Materials Literature
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The ground-state structures of the Au-based charge-transfer complexes,[AuⅠMⅠ(CNH)2(PH2CH2PH2)2]2+(M=Co(1),Rh(2) and Ir(3)),were optimized using the SVWN,XαVWN and MP2 methods.It was shown that the weak Au-M interaction was reasonably described.This is evident in the calculated Au-M distances(0.268～ 0.302 nm),stretchin…
Based on a phase-field model,a series of numerical calculations of dendritic growth into undercooled melt for a pure material were performed,and the influence of some physical parameters,including anisotropy strength,undercooling and noise factor,on dendritic growth were investigated.Results showed that the noise coul…
A copper(core)-nickel(shell) nanostructure was synthesized by porous anodic aluminum oxide template (AAO) combined with electrochemical deposition according to a new two-step method, i.e., the copper nanowire core was prepared first and then the AAO pore was widened and followed by the growth of the nickel shell in th…
A new lead-free piezoelectric ceramics of(1-x)Na1/2Bi1/2TiO3-xNa1/2Bi1/2(Sb1/2Nb1/2)O3 was prepared by conventional solid state reaction and the effects of B-site complex ions substitution on dielectric properties and relaxation of Na1/2Bi1/2TiO3 lead-free piezoelectric ceramics were investigated. The mechanism of rel…
The globe-like diamond microcrystalline aggregates were fabricated by microwave plasma chemical vapor deposition (MPCVD) method. The ceramic with a Ti mental layer was used as substrate. The fabricated diamond was evaluated by Raman scattering spectroscopy, X-ray diffraction (XRD) spectrum, scanning electron microscop…
Fe-MCM-41 sieve was synthesized by direct hydrothermal method using NaSiO3 and Fe(NO3)3 as silicon and metal source,respectively,and CTAB as template.Bimetallic modified mesoporous materials doped with Co and Cr were prepared on the base of Fe-MCM-41.Structure and properties of the obtained materials were characterize…
Effects of modification of sisal fiber (SF), length and content of SF on physical and mechanical properties of sisal fiber-polypropylene (SF/PP) composites were studied. And the microstructures of impact fracture surface were also analyzed by SEM. The results showed that impact strength of composites treated by alkali…
Bx:Bi-CVG ferrite samples were prepared by solid-state reaction.The effect of sintering additives of B2O3 on the bulk density,phase structure,microstructures and magnetic properties of Bi-CVG were investigated by means of XRD,SEM and MATS.The results showed that doping B can lower sintering temperature of Bi-CVG sampl…
ABS modifiers prepared by SBR with difference diameter were used to toughen PVC in this study,and it was found that the optical properties of ABS/PVC alloys declined with diameter increment and its notched impact strength increased firstly and then decreased,the maximum value was showed at 225nm.The influence of NaCl…
The functional modification of hydroxyl-caped polyether polyurethane prepolymer(PU) with tribromophenyl glycidyl ether(TBPGE) catalyzed by n-C4H9Li and Et3N was studied.TBPGE is a flame retardant with chemical reactive epoxy group.Structural analysis of the products showed that the ring-opening alkylation reactions of…
Ba(Ti_(0.91)Zr_(0.09))O_3 ceramics doped with CuO,Bi2O3O3,MoO3 and Li2O respectively was prepared by a solid phase reaction.The effect of A-site and B-site donor-acceptor doped on dielectric relaxor behaviour was investigated.The dielectric constants as a function of temperature at different frequencies show that rela…
The crystal of benzoic acid(C7H6O2) has been prepared and structurally determined by X-ray single-crystal diffraction.The titled compound crystallized in the triclinic system,space group P1-with a = 0.515 6(8) nm,b=0.552 1(8) nm,c=2.204 9(3) nm,α= 97.19°,V =0.622 8(16) nm3,Z=18.The first-principle calculations were pe…
(Y,Gd)2O3∶Eu3+ nanopowders were prepared by co-precipitation method using ammonium bicarbonate as precipitating agent.FT-IR,XRD,TEM,SEM,DTA/TG and SEM were used to characterize the samples.The emission spectrums of the samples were analyzed by the fluor-photometer.The results show that the powders are approximately sp…
Luminescent material,Sr1.98Eu0.02MgSi2O7,was prepared by sol-gel method.The structure of luminescent material was made up of akermanite.It was found that liquid phase appeared during the sinter process by SEM.The main excitation and emissions situated at 353nm and 468nm respectively by fluorescence analysis.It was the…
Renewable materials in automobile ecology design were discussed from ecology design thought.The function of renewable material for the health of the ecosystem and sustainable development of mankind was analyzed.It was put forward that the solution to solve the contradictory between automobile industry development and…
In order to develop silk underwear fabric with good anti-bacterial property,the modified silk was prepared using 2-diethylaminoethyl methacrylate(DEAEMA) as monomer,CuBr/N,N,N′,N″,N″-pentamethyldiethylenetriamine(PMDETA) as catalyst system via atom transfer radical polymerization(ATRP) method in water/ethanol media.Th…
In this paper a series of RE2MgNi9 hydrogen storage alloys were synthesized by vacuum induction melting method.The products were modified by heat treatment under argon protection for at least 5h at different temperature.The structure of the alloys were tested by SEM and XRD.The electrochemical characteristics of the a…
Based on the introduction of preparation processes,microstructures and formation mechanisms of TiC-TiB2 composite ceramics,and by combining with the microstructures and formation mechanism of TiC-TiB2 prepared by combustion synthesis under high gravity,the characteristics of the various processes and their influences…
On the basis of first transformation of impulse-thermal conductivity hydrogen analyzer,its secondary transformation was performed to make it have the temperature programming function.By use of different combinations of the two transformed analyzers,the release of helium and hydrogen in metal was investigated.The resul…
Side-chain azobenzene polyimide had been synthesized from amino azobenzene monomers and polystyrene-maleic anhydride copolymer through graft polymerization and studied its chemical structure,thermal stability,light responsiveness and photoelectric properties.The results showed that azobenzene polyimide had excellent w…