30 December 2015, Volume 46 Issue 24
    

  • Select all
    |
  • Effect of ACF Microstructure on Microwave Absorption Properties of ACF Felt Screens Composites
    Shaoxu Xia
    . 2015, 46(24): 1-0.
    Abstract ( ) Knowledge map Save
    Abstract: The Interleaved structure frequency selective surfaces (FSS) have been designed. And the FSS structures are placed to form microwave absorbing composites. The surface morphology of carbon fiber was observed using the scanning electron microscopy (SEM), and the microwave reflective and absorption properties were measured using the Vector Network Analyzer. Results show that the ACF specific surface area and pore size are gradually increased as the activation temperature increases; The microwave absorbing properties increased at first and decreased subsequently with temperature increasing, and the absorbing performance was the perfect when the re-activated temperature was 750℃, the absorption bandwidth of reflection loss below -10dB was from 5.2GHz to 9.9GHz, and the lowest reflection loss was -21.1dB; The electromagnetic scattering losses of π electron polarization relaxation and microstructure in ACF increased the absorbing properties.
  • Effect of the Compatibilizer SEP on the Recycled Polypropylene/Recycled High Impact Polystyrene Blends
    Yu-Fei KONG 迎春 李
    . 2015, 46(24): 2-0.
    Abstract ( ) Knowledge map Save
    The recycled polypropylene(R-PP)/recycled high impact polystyrene(R-HIPS) blends were prepared through the twin screw extruder. The effect of the poly (styrene-b-ethylene-co-propylene) (SEP) acted as the compatibilizer on the mechanical properties, morphology, melt flow index(MFI) and the final torque was investigated in this paper. It was found that the notch impact strength of the R-PP/R-HIPS blends with 10phr SEP was 5.28KJ/㎡ which was improved by 114.63% than that of the R-PP/R-HIPS composites without SEP. However, the other mechanical properties of the blends decreased slightly when SEP was added into the R-PP/R-HIPS blends. And the morphology of the blends showed that the dispersed phase decreased in size and distributed better which was possibly due to well compatibility of the SEP. In addition, the increase of the MFI and the final torque indicated that the viscosity of the blends increased.
  • Preparation and characterization of nanostuctural MgAl2O4 powders
    Meng CHEN
    . 2015, 46(24): 3-0.
    Abstract ( ) Knowledge map Save
    Aluminum nanoparticles（NPs）in large quantities were prepared via dry roller vibration milling at room temperature with the particle size between 50 and 80 nm. The precursor of MgAl2O4 was prepared using NPs and Mg as raw materials, Na2CO3 and NaOH or NaHCO3 as precipitation agent with the technique of the aid of ultrasonic dispersion, drying, calcination and characterized by XRD, SEM. The results showed that after heat treatment of 500 ℃,almost all precursor was transformed into MgAl2O4 phase with about 10nm particle size and good dispersion. The temperature in this way was hundred lower than that in traditional process.
  • Preparation of pitch-based carbon materials by pyrolytic calcium carbonate template for supercapacitors
    Cun GuiZHONG
    . 2015, 46(24): 4-0.
    Abstract ( ) Knowledge map Save
    A coal tar pitch is used as supercapacitor precursor because it has a high carbon yield. Here we report a feasible method to make pitch-based porous carbon materials for supercapacitors by using inexpensive calcium carbonate as a hard template with its double effect of space-occupying and thermal decomposition. The textural characterization of the carbon material was investigated by N2 adsorption and transmission electron microscope. Its electrochemical capacitive performance was investigated by constructing a single electrode capacitor in a 6 M KOH electrolyte. The results showed that the carbon material possessed a high capacitance of 209 F?g-1 at current density of 0.4 A?g-1 and showed an excellent cycle stability.
  • Recent progress on cell-loaded hydrogels with wide stiffness range and intelligent adjustability
    . 2015, 46(24): 5-0.
    Abstract ( ) Knowledge map Save
    It has been known matrix stiffness plays a pivot role in cellular events, like spreading, proliferation, migration and differentiation. Hydrogels provide a good platform to investigate how cells sense matrix stiffness due to their excellent capacity in mimicking native cellular environment. However, the limited stiffness tunability, hinder the efforts to demonstrate the matrix effects relevant to many in vivo progresses. These problems have been addressed by the recently emerged great quantity of exquisitely designed hydrogels. In this review, we summarize the latest progresses in hydrogel designing to mimic dynamic in vivo environment spanning a wide range of stiffness. We aim to search for outstanding approaches of designing hydrogels with fine-tunable stiffness.
  • Effect of Impurity Eliminating Methods on Infrared Optical Properties of Ge28Se60Sb12 Chalcogenide Glass
    zhao hua wang yanhang
    . 2015, 46(24): 6-0.
    Abstract ( ) Knowledge map Save
    IR optical properties of Ge28Se60Sb12 chalcogenide glass pretreated by three different impurities eliminating technologies were studied in this article. Results showed that hydroxyl content of quartz ampoule by high temperature pretreatment was reduced, which caused 6.3 μm, 7.9 μm and 12.8 μm impurity absorption bands in Ge28Se60Sb12 chalcogenide glass significantly reduced, the doping Al into the raw material can effectively eliminate [Ge-O] absorbance in chalcogenide glass, while the overall heating of the purification process can significantly improve the transmittance around 4.5μm and 4.9μm, which is arouse by [Se-H] impurity. The results show the effective combinations of three eliminating impurities ways can access to high quality, and no absorption loss chalcogenide glass.
  • Study on Electromagnetic Shielding Sheet Prepared by FeSiAl alloy and Thermoplastic Elastomer POE Applied in NFC System
    LIANWEN DENG
    . 2015, 46(24): 7-0.
    Abstract ( ) Knowledge map Save
    The flexible electromagnetic shielding sheets based on soft magnetic FeSiAl alloy were produced by calendering technics. The flaky Fe84Si6Al10 alloy powders prepared by the high-energy ball milling process were chosen as magnetic fillers and thermoplastic elastomer POE as matrix. Effects of the particle shape, particle size, filling amount of magnetic alloy materials on the permeability spectrum and shielding property of electromagnetic shielding sheet were investigated. The results show that the Fe84Si6Al10 alloy powders prepared by high-energy ball milling process can obtain a high flatten rate, the flatten rate is large as 100. While the thickness is less than 1μm, the influence of the flaky magnetic powders with different radial dimensions on the permeability spectrum of electromagnetic shielding sheet is not so obvious. With increase of flaky Fe84Si6Al10 powders filling amount, the real permeability of electromagnetic shielding sheet increased significantly, and the imaginary part also increased slightly. While the mass ratio of magnetic powders and matrix is 9 to1, the real permeability of electromagnetic shielding sheet reaches 35.1 at 13.56MHz, and the reading/writing distance reaches 33mm, so the electromagnetic shielding sheet can be efficiently applied to resist electromagnetic interference in NFC system.
  • Influence factors of the properties of amorphous alloy filler and its electromagnetic shielding coating
    Min-Na YANG Lin LU Xiao-gang LI
    . 2015, 46(24): 8-0.
    Abstract ( ) Knowledge map Save
    Soft magnetic amorphous alloy has attracted more and more attention in the field of electromagnetic shielding due to its excellent magnetic properties, corrosion resistance and mechanical properties. In this paper, the structure and performance of amorphous alloy are briefly introduced. The influence factors of magnetic properties and corrosion resistance of soft amorphous alloy are systemically summarized. Also, the influencing factors of electromagnetic shielding effectiveness of the coating and their effects were addressed extensively from the angle of developing electromagnetic shielding composite coating using soft magnetic amorphous alloy as filler. Based on literatures, the improvement of soft magnetic properties and electromagnetic shielding effectiveness of the amorphous alloy can be achieved by strengthening amorphous forming ability, enhancing corrosion resistance and refine grains. Appropriate addition of alloy element, surface modifications or a doubledecked structure is effective to improve electromagnetic shielding effectiveness. Moreover, for the electromagnetic shielding composite coating, the electromagnetic shielding effectiveness can be raised by a good conductive network constructed with flaky powders and a good match between the filler and coupling agent. Based on the review, some developing trends are postulated at last.
  • Study of low inter-solubility metallic composites and its interfacial model
    . 2015, 46(24): 9-0.
    Abstract ( ) Knowledge map Save
    Low inter-solubility metal as a kind of metal matrix composites. The two bonding constituents are neither reaction nor dissolution in each other, which is against the development of composites. Research of low inter-solubility metallic composites in recent years is reviewed. This paper present the characteristics, applications and processing techniques of low inter-solubility metallic composites, both in China and abroad, using Cu-Fe and Mo-Cu as examples. It shows that atomic level interdiffusion is present at the interface, and low inter-solubility metal can be bonded by solid state welding. The model of roll-bonding and diffusion-bonding for low inter-solubility metal are established, which can provide a guidance for the processing of low inter-solubility metal with high quality and efficient.
  • Study on Dynamics of Titanium Foams Creep Processing
    . 2015, 46(24): 10-0.
    Abstract ( ) Knowledge map Save
    Abstract: The foaming dynamics equation of Titanium foams was deduced through analyzing the foaming process of Titanium foams produced by Gas trapping method. The main factors affecting titanium foam porosity are foaming temperature and creep resistance of the matrix. The relation curves of between the porosity and the foaming time, and their kinetic curves under different temperature conditions are built by experimental results. The microstructure of Titanium foams matrix was analyzed by metallurgical microscope. It is found that the foaming rate is proportional to the foaming temperature and inversely proportional to the matrix material creep resistance, but with the temperature increases, the foaming rate does not increase continuously. This phenomenon can be explained by the microstructure change of the matrix material whose creep resistance decreases first and then increases with temperature increases. And this proves the reasonable of the kinetic curve.
  • The hydrolysis effect on phosphoester bond by chitosan Ce(Ⅳ) complexes
    . 2015, 46(24): 11-0.
    Abstract ( ) Knowledge map Save
    CCC[Ce(Ⅳ),Cu(Ⅱ)] was prepared by attaching Ce(Ⅳ), 1,4,7,10-tetraazacyclododecane and chlorophyll-Cu(Ⅱ), and using reversed-phase cross-linking method and ion binding method. The results indicated that pNPP and AMP was hydrolyzed up to 60 % and 165 % at 60℃ after 60 minutes. The pseudo-first-order kinetic constant (Kobsd) was 1.9×10-2 M?min-1 for pNPP treatment, 3.9×10-2 M?min-1 for AMP treatment. The complexes could significantly accelerate the cleavage of phosphoester bond. The time-hydrolysis rate was 183 times faster than pNPP itself, 211 times faster than AMP itself. pBR322 DNA was transformed from the supercoiled to the nicked circle and the linear by CCC[Ce(Ⅳ),Cu(Ⅱ)], and the proportion of the nicked circles was as high as 93 %.
  • Study on structure and thermo-physical properties of Sm2-xYxZr2O7 ceramics for thermal barrier coatings
    Min XIE
    . 2015, 46(24): 12-0.
    Abstract ( ) Knowledge map Save
    Sm2-xYxZr2O7 ceramics were prepared by solid phase synthesis method. The phase structure were analysed by XRD, the morphology were observed by SEM, and the thermal expansion coefficient, themal diffusitivities and conductivities of the ceramic materials were characterized. The results show that ceramics are mainly consist of pyrochlore structure while x≤0.8, the size of grains range 1~3μm. The thermal expansion coefficient of the ceramics are more than 11.0×10-6/K-1 while the temperature range from room temperature to 1200℃. The thermal diffusivities of the ceramics decrease with the increased x value, and thermal conductivies dropped to 1.50 W?m-1K-1 which shows excellent thermo-physical properties.
  • Preparation and Tribological Properties of Nano- Al2O3-Ni-P Electroless Composite Coatings
    . 2015, 46(24): 13-0.
    Abstract ( ) Knowledge map Save
    In order to obtain the composite coating of excellent tribological properties, the nano-Al2O3-Ni-P composite coating was applied to 20# steel substrate. The orthogonal experiment method was used to study the plating bath formula. The nano-Al2O3 content and the plating temperature were investigated for their effects on the hardness, friction and wear property of the composite coating. The surface topography of the coating was observed through the scanning electron microscopy. The results showed that the most important factor affecting the hardness and wear resistance was the content of nano-Al2O3 particles in plating liquid. The nano-Al2O3 particles effectively improved the surface structure of Ni-P alloy coating and were well distributed in the composite coating, which would significantly improve the coating hardness and wear resistance. Moreover, when the nano-Al2O3 content was 6g?L-1, the nano-particles were densely and evenly distributed in the composite coating, generating the best coating hardness, wear resistance and bonding to the base material. The temperature of the plating liquid affected the coating properties and provided best hardness and wear resistance at 85℃.
  • Preparation and photocatalytic properties of PAN fiber supported copper-iron bimetallic 2,2'-bipyridine complex
    . 2015, 46(24): 14-0.
    Abstract ( ) Knowledge map Save
    A bimetallic heterogeneous Fenton catalyst was prepared by supporting iron 2,2'-bipyridine complex (Fe(bpy)32+) and Cu2+ onto amidoxiamted polyacrylonitrile (PAN) fiber successively. Then the catalyst was characterized by FT-IR, DRS and XPS analyses and used for the degradation of organic dye Rhodamine B under visible irradiation. The results indicate that Cu2+ could interact with adjacent Fe2+ through hydroxyl group in the bimetallic catalyst, leading to the catalyst with broad light absorption in the visible region.. In addition, the catalyst with Cu/Fe molar ratio of 1.07 showed the highest photocatalytic activity, and the introduction of Cu2+ significantly increased the pH applicability and utilization of visible irradiation.
  • Preparation and properties of antimicrobial polyhydroxybutyrate (PHB) films
    Xiao-Yan FAN
    . 2015, 46(24): 15-0.
    Abstract ( ) Knowledge map Save
    Abstract: Antibacterial films were prepared by solvent evaporation technique by the mixtures of 5,5-dimethyl-3-(3’-triethoxysilylpropyl)hydantoin polymer (PSPH) and polyhydroxybutyrate (PHB) which is a biodegradable and thermoplastic aliphatic polyester. The surface morphology, structure and thermo property were measured by SEM, FT-IR and DSC. The tensile test, wetting property, UV light stability, and controlled release characteristic were investigated. The antimicrobial activities of chlorinated films with 1.204×1018 atoms/cm2 of active chlorine were challenged with Staphylococcus and Escherichia coli O157：H7 according to AATCC 2004 Test Method, and showed good efficacy against these bacterial species by inactivating 100% Staphylococcus and Escherichia coli O157：H7 within 5 min. The films may serve as potential materials for food packaging and biomedical applications.
  • The study of preparation and thermal conductivity of magnetic nanofluid based Fe3O4 coated on carbon nanotubes nanoparticles in amagnetic field
    . 2015, 46(24): 16-0.
    Abstract ( ) Knowledge map Save
    In this paper,magnetic nanofluids based Fe3O4 coated on carbon nanotubes (Fe3O4-CNT) were prepared. Its dispersibility was characterizated by transmission electron microscopy (TEM), its stability was observed by standing,and its thermal conductivity was investigated in a magnetic field.The results showed that Fe3O4-CNT magnetic nanofluids could be stable existed at higher strength magnetic field.As the magnetic field strength increased,Fe3O4-CNT nanoparticles into chains and CNT orientation had played a leading role for the increased thermal conductivity of Fe3O4-CNT magnetic nanofluids.Under certain magnetic field direction,the thermal conductivity of magnetic nanofluid was significantly increased because of the anisotropy of carbon nanotubes. Due to the large aspect ratio of carbon nanotubes ,the length of the chain and the speed into a chain in the magnetic field could be effectively reduced,and the thermal conductivity of base fluid was improved further .
  • Tensile mechanical properties of CuZr-based bulk metallic glass at room temperature
    Lian-Xiang FANG
    . 2015, 46(24): 17-0.
    Abstract ( ) Knowledge map Save
    Due to the limitation of sample dimension and material properties, the studies related on the mechanical properties under compressive conditions of bulk metallic glasses are mainly focused so far. In this paper, a Zr47Cu46Al6Co1 bulk metallic glass was chosen for the evaluation of tensile mechanical properties at room temperature. The tensile strength of the samples is ~2000 MPa at room temperature, comparable with the value of other similar CuZr-based bulk metallic glasses. The brittle fracture without yielding and ductility can be observed under the present conditions. The fracture surface of the failed samples is smooth with river-like patterns typical for the morphology of metallic glasses after tensile failure. The results suggested that the brittle fracture mechanism reported in other metallic glass systems controls the fracture behavior of the BMG.
  • Effect of additives on morphology and performance of PVDF membranes via dual-bath coagulation
    Zhi-Ying WANG
    . 2015, 46(24): 18-0.
    Abstract ( ) Knowledge map Save
    Hydrophobic polyvinylidene fluoride (PVDF) membrane were fabricated by a dual-bath coagulation bath method. The first coagulant was isopropanol and the second coagulant was water. N,N-dimethylacetamide (DMAc) was used as solvent. Polyethylene glycol (PEG-400) and tetraethylorthosilicate (TEOS ) were used as additives. Effect of the additive content or mass ratio of PEG-400 to TEOS on membrane morphology and performances such as wettability, permeability and mechanical property were investigated. The SEM images of the membranes revealed that the pore-forming region of PEG-400 was top surface, and the pore-forming region of TEOS was the cross section. As the content of PEG-400 increased, the number of top surface pores and pore size increased and the nitrogen flux increased, too. But the hydrophobic of the top surface decreased with increasing the content of PEG. As the content of TEOS increased, the number of crystalline particles and the nitrogen flux increased, at the same time, the hydrophobic of the top surface increased and the mechanical strength decreased. Using the mixture of PEG-400 and TEOS as additive, membrane properties were optimized. Perfect performances could be obtained in the experimental range when the content of additives was 10% and the mass ratio of PEG-400 to TEOS was 6∶4.
  • Preparation and Characterization of Silicon Carbide-Derived Carbon/Mesophase Pitch Carbon Composites
    . 2015, 46(24): 19-0.
    Abstract ( ) Knowledge map Save
    Silicon carbide/mesophase pitch carbon precursors were prepared by pyrolysis of polycarbosilane and mesophase pith mixture at 320oC and then carbonization and graphitization at different temperatures. The as-prepared precursors were etched by Cl2 at 1000oC to obtain silicon carbide-derived carbon/mesophase pitch carbon composites. The micro-morphology and structures of the samples were characterized by polarizing microscope, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and raman spectra. The specific surface area and pore structure of samples were analyzed by a physical adsorption analyzer. The results show that the crystal size of SiC formed by the pyrolysis of polycarbosilane becomes larger with the increasing of heat treatment temperature. Meanwhile, the graphitization degree of mesophase pitch carbon increases. The silicon carbide-derived carbon is mainly amorphous carbon and noticeable graphitized carbon layers can be observed. With the increasing of heat treatment temperature, the specific surface area of the samples after etching decreases and the micropore size increases.
  • Sintering Process and Properties of 0.98Bi0.5(Na0.82K0.18)0.5TiO3-0.02NaNbO3 Lead-Free Piezoelectric Ceramics
    . 2015, 46(24): 20-0.
    Abstract ( ) Knowledge map Save
    0.98Bi0.5(Na0.82K0.18)0.5TiO3-0.02NaNbO3 lead-free piezoelectric ceramics were prepared by solid state reaction method. The effect of sintering process on the phase, microstructure and electric-properties were studied. The results show the calcinated powder is perovskite structure at 900℃.The crystal structure is not changed with the sintering process beginning. The grain size increases with sintering temperature increasing, but glass phase appears in the system because of high sintering temperature. The excellent electric properties of εr=1620, tanδ=0.030, d33=138pC/N, kp=0.40 are obtained at 1200℃. The lowest curie temperature of 370℃is tested at 1200℃ and the curie temperature is enhanced without sintering temperature is higher or lower than 1200℃. The dielectric constant is deceased with the frequency increasing. The electric domain turning-direction polarization and space charge polarization loss contribution around 150kHz, and the dielectric constant changes very small when the frequency is more than 150kHz.
  • Hemolysis and cytotoxicity of surface organically modified pure Magnesium
    . 2015, 46(24): 21-0.
    Abstract ( ) Knowledge map Save
    Phytic acid and silane were selected to modify the pure magnesium in this study. Hemolysis and cytotoxicity of modified magnesium were tested. The results show that compared with pure magnesium, the hemolysis rate of modified materials dropped significantly. The hemolysis rate of pure magnesium is 59.93%, while the magnesium modified by phytic acid is 4.28 and by silane is 0.87%, which are within the demand (<5%). The cytotoxicity of phytic acid modified magnesium is level 2 toxic after 1d, cannot meet the requirements of biomaterials; then change to level 2 and level 1 non-toxic after 3d and 5d respectively, which meet the requirements of biomaterials. The cytotoxicity of silane modified magnesium meets the demand of cytoxicity through the whole test, is level 1 of non-toxic after 1d and 3d, while after 5d is level 0 and has a promoting effect on the growth of cells.
  • The preparation and properties of degradable calcium phosphate bioceramics
    Shu-yang LI Hong Li Peng WANG Peng-zhen LIU Yong-Gang YAN
    . 2015, 46(24): 22-0.
    Abstract ( ) Knowledge map Save
    Using sintering methods on the mixture of the calcium dihydrogen phosphate and calcium carbonate powder, and the calcium hydrogen phosphate and calcium sulfate powder, a series of calcium phosphate bioceramics materials were prepared. The samples were detected by XRD, FI-IR, degradation experiments, calcium and phosphorus ratio analysis, SEM observation and cytotoxicity test. Results showed that under the 750 ℃ sintering, calcium dihydrogen phosphate and calcium carbonate with 1:1 mole ratio generated calcium phosphate. When the molar ratios were 1:2 and 1:2.3, the calcium phosphate and hydroxyapatite bipolar biological ceramic were generated. Calcium hydrogen phosphate and calcium sulfate with molar ratios of 1:0.67 and 1:0.5 generated the calcium pyrophosphate and calcium sulfate bipolar biological ceramics. Degradation experiment showed that the weight loss of calcium pyrophosphate and calcium sulfate bipolar biological ceramics were 35% and 36%, respectively, after soaking in PBS for 28 days, and had no significant effect on the pH values of soaking liquid. Also the cytotoxicity test showed that the calcium pyrophosphate and calcium sulfate bipolar biological ceramics was non-toxic to cells.
  • Influence of DETA on the structure and photocatalytic activity of Sm(OH)3 nanocrystallites prepared by water-bath process
    . 2015, 46(24): 24-0.
    Abstract ( ) Knowledge map Save
    Samarium hydroxide (Sm(OH)3) nanocrystallites with controllable size were successfully prepared using Sm(NO3)3?6H2O, diethylenetriamine (DETA) as main raw materials and distilled water as reaction solution by a facile water bath process. The phase composition, surface groups, morphologies and optical properties of the samples were characterized by X-ray diffraction, Fourier transform infrared spectra, scanning electron microscopy and UV-vis diffuse reflectance spectroscopy. The influence of different addition amount of DETA on the structure control and photocatalytic activity of the prepared samples has been investigated. Results show that with the increase of DETA addition, the crystallinity, size, aspect ratio and photocatalytic activity of the Sm(OH)3 nanorods were decreased. Sm(OH)3 hexagonal prims with bigger aspect ratio prepared at 0.40 vol% of DETA shows high photocatalytic activity to degrade Rhodamine B (RhB), which degradation efficiency reaches 94.2%.
  • Verification of Low Temperature Performance of Asphalt Pavement Aging Material in Cold Regions
    . 2015, 46(24): 25-0.
    Abstract ( ) Knowledge map Save
    The main form of highway engineering damages is the low-temperature cracking of asphalt pavement, which ubiquity of damage in cold regions. Low-temperature performance of binder and asphalt mixture is a reflection of anti-cracking ability of asphalt pavements. This paper was supported by Changping highway construction engineering, by investigation the actual cracking status of asphalt pavement, by the indirect tensile test in low temperature condition, and by the bending beam rheological test in laboratory, can have verification of low temperature performance of asphalt pavement aging material. Also we have an analysis of actual cracking status of asphalt pavement with low temperature performance of pavement aging materials, and the result has proven the evaluation criterion of AASHTO highly effective for verification low temperature performance of binder and asphalt pavements.
  • Research progress graphene-based supercapacitor
    . 2015, 46(24): 26-0.
    Abstract ( ) Knowledge map Save
    Graphene can be used as the ideal electrode material for supercapacitors in double-layer capacitors because it has unique two-dimensional network structure and excellent electrical properties, mechanical properties and large specific surface area. There is a problem that graphene usually occurring the irreversible agglomeration result in reducing dramatically the available active surface of graphene and decreasing the conductivity and capacitance. In recent years, the problem was studied through graphene doped with the heteroatom of N/B/P and combinied with nanotube as well as formed complmentary composite electrode materials with Faraday Pseudocapacitance, and these solution have good effects. This paper reviews the progresss about the problem and solution. Meanwhile, the further research and the direction is prospected.
  • Preparation of Novel Biological MgO/PCL/ZnO Composite Coatings on Magnesium Alloy and their Corrosion Resistance
    li qing
    . 2015, 46(24): 27-0.
    Abstract ( ) Knowledge map Save
    In this study, novel biological MgO/PCL/ZnO composite coatings for enhancing the corrosion resistance and biocompatibility of the magnesium implant were designed and prepared by using anodization treatment and dip-coating technique. The adhesion test suggested that the composite coatings have better adhesion strength. The composite coatings are smooth and with low porosity. The ZnO powders disperse in PCL uniformly of the composite coatings. In addition, the results of corrosion test demonstrated that the MgO/PCL/ZnO composite coatings have good corrosion resistance in SBF.
  • Preparation and characterization of monodisperse zirconia spherical nanometer powder via lamellar liquid crystal template method
    weiyan-he weiyanhe
    . 2015, 46(24): 28-0.
    Abstract ( ) Knowledge map Save
    The cubic phase spherical zirconia nano-powder was prepared by a direct template route in the lamellar liquid crystal formed by TritonX-100/SDS /H2O system. The precursor powders and zirconia powders were characterized by XRD, FT-IR, TG/DSC, TEM, SEM methods. Results showed that the stability of the lamellar liquid crystal were controlled by the suitable conditions. The size and morphology of the nanoparticles were greatly affected by NH3?H2O concentration and ZrOCl2?8H2O concentration. The zirconia nanoparticles obtained shows narrow particle size distribution in the range of 15–30 nm.
  • Application of [NiFe/Cu/Co/Cu]n multilayer nanowires in giant magnetoresistance displacement sensor
    Wang HongZhi
    . 2015, 46(24): 29-0.
    Abstract ( ) Knowledge map Save
    High ordered [NiFe/Cu/Co/Cu]n multilayered nanowires for the chip of displacement sensor were fabricated by the electrodopsition with double cells. The research showed that the displacement sensor has high temperature stability through at 10~40oC with the simple linear relationship between output voltage and displacement. Compared with the sensor using [NiFe/Cu/Co/Cu]n multilayers, the sensor using [NiFe/Cu/Co/Cu]n multilayered nanowires has a better performance.
  • Fabrication and property correlation of a Co-based bulk metallic glass with ultrahigh hardness, elastic moduli, and thermal stability
    WANG Ju
    . 2015, 46(24): 30-0.
    Abstract ( ) Knowledge map Save
    A Co23Ir6Ru3Re20Ta10B35 bulk metallic glass (BMG) with critical diameter of glass formation up to 1 mm is synthesized by copper mold casting. The glassy alloy exhibits ultrahigh glass transition temperature of 1021 K, Young’s modulus of 277 GPa, shear modulus of 103 GPa, and Vickers hardness of 16.4 GPa. Glass transition temperature and shear modulus are the highest values for reported bulk metallic glass so far. Several universal criteria correlated with the thermal properties, elastic constants and hardness are validated for the BMG combining with the data of 39 typical BMGs.
Author Center
Review Center
Journal Online
Copyright © Jorunal of Functional Materials
Tel: 023－68264739　 　
E-mail: gnclbjb@126.com　
Total visitors:
Visitors of today:
Now online:
渝公网安备50010902000552号　渝ICP备2022001025号-1