Materials Literature
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In the present paper,optical characteristics of InGaN/GaN multiple quantum well s light emitting diodes fabricated on the conventional(C-LEDs) and patterned sapphire substrates(PSSLEDs) were investigated by electroluminescence(EL) and photolum i nescence(PL).PSSLEDs show higher light output power and smaller full widt…
The spectra of permittivity and permeability of the coaxial planar anisotropic carbonyl-iron(PACI)/paraffin and ferrite/paraffin composite samples were studied.The coaxial ferrite/PACI/paraffin composite samples with different volume concentration of the two kinds of particles were prepared.Their permittivity and perm…
In this paper,the domestic status of the technology of black conversion coating on steel in recent years was reviewed.Two aspects,namely black oxide coating and black phosphate coating were described.The development status of each technology,reaction condition and composition of the coatings,etc.were compared and anal…
In present paper,boron-doped diamond was synthesized by static pressure method using Fe-Ni-C-B system catalyst.The morphology,crystal structure,resistance-temperature characteristic curve were studied.Experiments proved that the boron-doped diamond has different ionization energy at different temperature range and the…
In FEM simulation of ring rolling process,element distortion is aroused by large deformation.An adaptive mesh refinement and remesh algorithm was studied.Based on analyzing the mesh distortion,a remesh activation criteria was put forward according to the discrete error of space domain.Considering the features of ring…
Silver nanoparticles were synthesized by using sodium oleate as stabilizer,silver nitrate as precursor and N,N-dimethylformamide as ruductant in aqueous phase.The kinetic process for the formation of silver nanoparticles were studied by changing reaction temperature and DMF addition amounts,and with the aid of UV-vis…
This paper discusses the evaluation method for the ramie fabric-evoked prickle,especially the method of using the mechanical index of the surface hair when press the fabric.The effect of some fabric construction parameters on prickle sensation was analyzed by statistical method.
Two kinds of polycarboxylate ether superplasticizer(APEG type and TPEG type)with different molecular structures were synthesized respectively under 65 ℃ and room temperature conditions and characterized by IR.The effects of the type of initiator,reaction temperature on the dispersant's performance of APEG system were…
The persimmon powder was used as raw material to prepare two persimmon biosorbents SPP and HPP by chemical modification with H2SO4 and HNO3,respectively.The adsorption behaviors of Cu2+ and Pb2+ in aqueous solutions on two persimmon biosorbents were investigated.The effects of solution pH,solid-liquid ratio,temperatur…
In view of measuremeat of fineness of yarn in fabric,it used a slice technology to make the fabric slices and got the image of fabric slices,then used MATLAB graphics processing functions processing the image for measuring.At last,it used microscopic image analysis software package in CU-2 fiber fineness instrument to…
According to the characteristics of yak cashmere fiber,the article presents the processing route of worsted high-count pure yak-cashmere woven yarn,which is based on the worsted spinning system,to reduce the damage of the fiber and ensure the top uniform.The long process route can make the advantage of the fiber fully…
The green phosphors NaLa(1-x)Tbx(MoO4)2 with different concentrations of Tb3+ were synthesized via the combustion synthesis method.The phase composition and optical properties of as-synthesized samples were studied by X-ray powder diffraction and photoluminescence spectra.The influences of processing parameters,such a…
The advantages of resin sand-coated iron mold casting process were introduced.The as-cast high strength and high elongation nodular iron crankshaft was trial-produced by using Sb-containing nodularizing alloy and sand-coated iron mold casting process.The result showed that microstructure and the mechanical properties…
This article analyzes the importance of draping(three-dimensional cutting) technology in the production of ready-to-wear clothes.After a close comparing of draping and clipping,this article comes to a conclusion that draping technology has strong adaptability and plasticity in dealing with such fields as garment desig…
Amorphous Si-C-O-N coatings were deposited by RF magnetron sputtering on SSiC ceramic substrates.The morphology of the coatings were observed by FESEM.The results show that the coatings have less surface defects and higher compact structure with increasing sputtering power.This is attributed to the ion bombardment ind…
A kind of environmental titanium alloy anode oxidation process was introduced in this paper.Different from traditional process,there were not toxic substances such as hydrofluoric acid and chromic acid in this process,which would reduce the effect on environment.And more,the process was simple,the raw material was che…
To determine if radiopharmaceutical waste can be cleared or decay-in-storage is effective for its disposal,we have evaluated the extent of this problem in low level radioactive waste involving ~(99)Tc~m over a 10 half-life cycle of decay-in-storage by identifying the residual radionuclides in our dry waste using a mul…
The silicon-containing arylacetylene resin(PSA resin) has good mechanical,thermal property and wave transmission properties.Resin modified with functional groups of benzoxazine and propargyl ether has been prepared and characterized.The viscosity,rheological property,curing characteristic,heat resistance and mechanica…
The slurry was treated by ultrasonic cell disrupter,and the experiment was verified.Response surface design was generated by the Design-Expert software according to the central composite design principle and a mathematical model was set up.The optimal extraction conditions were found as liquid-to-solid ratio of 28:1 a…
In this peper,Equal Channel Angular Pressing is chosen as severe plastic deformation,by comparing the diffusion action of ECAP and equilibrium condition in Ag-Pb immiscible system to study the atom diffusion action under severe plastic deformation condition.The study results show that:The diffusion coefficient under E…