Materials Literature
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Three new exocyclic ring-fused boron-dipyrromethene(BDP)dyes with N,N-dimethylaniline,p-methoxyphenyl or phenyl subunit at meso-position were synthesized.Their absorption,steady-state fluorescence and electrochemical properties were investigated.The spectrofluorometric titrations were performed to examine their respon…
In terms of torque ripple,five-level converter of switched reluctant motor is proposed and analyzed.Conduction of new topology was analyzed,and conduction comparison between new topology and asymmetric half bridge was performed.Based on conduction theory and direct instantaneous torque control(DITC),hysteresis control…
Encapsulation is demonstrated to be an effective method for enzyme immobilization.Compared to traditional methods,the biomimetic approach at mild conditions has garnered much interest.For the removing phenol in waste-water,silica formed by polyethyleneimine-inducer was used to immobilize horseradish peroxidase(HRP)at…
The effects of Tg value,H-8905(viscosity adjusting resin),H-862(release agent) and H-859(wear resisting wax) on the performance of glazing oil were investigated.Depending on the result the glazing oil and buffing oil formulations were proposed which could meet the requirement of high glossiness and excellent wear resi…
This paper summarizes researches progress on TiO2 nanotubes in recent years.The preparation methods of the TiO2 nano-tubes and the underlying formation mechanisms are introduced,and key factors affecting the formation of anodic TiO2 nanotube ar-rays are discussed in detail.Different doping methods and their effects on…
MgCl2 was used as crystal controlling agent for the synthesis of regular needle-like calcium carbonate with diameter of 2.5?5μm and aspect ratio of 10?20.Complexometric titrating method was employed to determine the contents of Ca2+ and Mg2+ in filtrated solution after carbonization and the fresh MgCl2 was added to ba…
The first realization of transparent alumina ceramics among all advanced ceramics expands a new research field of advanced ceramics.The application of transparent alumina is also successful,such as arc tubes for high intensity discharge lamps.Fruitful results in theory research and processing optimization are made wit…
A high strength low alloy(HSLA)ship-hull steel was processed with solid solution at 900 ℃ and quenching in water and then aging at 400-700 ℃.Effect of aging temperature on microstructure and properties of the HSLA ship-hull steel was investigated by means of SEM,TEM,tensile test,impact test and hardness measurement.Th…
The short-term corrosion behavior of X80 pipeline steel was investigated in Huo'erguosi soil with saturated water using electrochemical measurement,scanning electron microscopy(SEM) and energy dispersive spectrum(EDS) analysis.The results showed that the corrosion rate of X80 steel presented the variational trend of r…
SrAl2O4:Eu2+,Dy3+,Pr3+ long afterglow phosphor powder was successfully prepared by combustion at a lower temperature of 650 ℃,using nitrate and carbamide as starting materials.The crystallization,crystallite size and luminescence properties of the phosphor were investigated.The results show that the crystalline struct…
Phosphotungstics acid with Dawson structure(P2W18) supported on SiO2 were prepared by the sol-gel method.The catalytic performance in synthesis of n-Butyl acetate with acetic acid and n-butanol was investigated and the mechanism was discussed.The optimized condition were as follows:the supported quantity is 25%,the ma…
In order to investigate the tensile deformation and fracture behaviors of a single crystal Ni-based superalloy in the temperature range from room temperature to 1 100 ℃,the fracture surface and dislocation configuration after tensile deformation were characterized by scanning electron microscope and transmission elect…
The content of silicon inclusions in steel was analyzed by original position statistic distribution analysis technique.The relationship between the signals of abnormal sparks and the content of silicon inclusions was investigated by combining with physical and chemical phase analysis,scanning electronic microscopy and…
MSWI fly ash concentrates toxic substances such as heavy metals,if treated improperly it would lead to secondary pollution.Therefore,MSWI fly ash is considered as hazardous waste,and need special treatment.The paper describes the research on immobilization of heavy metals in municipal solid wastes incineration(MSWI) f…
Using polyethylene glycol(PEG) as soft segments,1,4-butanediol(BDO) as chain extender,and modified MDI as curing agent,a series of polyurethane phase change materials(PUPCM)was obtained.The change in morphology and properties of PUPCM during heating-cooling cycles was online observed using polarization microscope(POM)…
One-off chopsticks and veneer plywood are used to make composite boards,and the preliminary study is made of the manufacturing process.The performance of three-layer and five-layer composite boards made during the experiment has reached the standard requirements for block boards.
Several hydroxyapatite(HA) microspheres with different structures,including solid,porous and hollow,were fabricated by the spray drying method,and the microsphere formation mechanism was introduced simply.The scanning electron microscopy was used to observe microstructure and surface morphology of the microspheres.Res…
For spinning higher quality chitin fiber/cotton blend yarn,the technology parameters are studied.The experiments show that reasonable technological parameters can guarantee the quality of the blend yarn.The less than 30% of chitin fiber ratio is a reasonable blend ratio.Based on the experiment conditions used in this…
The continuous cooling transformation curves of under-cooled austenite in Nb-V microalloyed spring steel 60Si2CrVAT were measured by using a DIL805A quenching deformation dilatometer.The microstructure changes of under-cooled austenite in the tested steels at different cooling rates were studied by the metallographic…
Three-point-bending fatigue tests were conducted on both WC-6(mass fraction,the same below)% Co functionally-graded cemented carbides(FGCCs) and conventional WC-6%Co cemented carbides.The relationship between fatigue fracture morphology and failure mechanism were investigated.The results show that the fatigue cracks a…