Materials Literature
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The Sb3 +,Bi3 +,Zr4 + and Si4 +doped YAG ∶Ce yellow phosphors were synthesized by high temperature solid-state method.The doping effect and the related mechanism of Sb3+,Bi3+,Zr4+ and Si4+ on the luminescence intensity of YAG ∶Ce were studied.The results show that the luminescence intensity firstly increases with the…
The environment of the indoor substation achieves the integrated control of the temperature,the humidity and the poisonous gas SF6 by combing the exhaust equipment with the air conditioning and refrigeration.Mathematical models of the temperature and the humidity are built according to the integrated factors of indoor…
High-resolution X-ray tomography technology was adopted to analyze inner structural features of multi-directional braided carbon / carbon composites.The tensile property and failure mechanism of this material at room temperature were also studied. Results show that the fiber tows of 4-D C / C composites have improved…
Tongling is one of the main non-ferrous metal mining areas in China, and the biodiversity in the river ecosystem of this area is seriously affected by heavy metals as a result of mining activities. In the winter in 2010, an investigation was conducted on the community structure of phytoplankton and its relationships w…
针对非制冷红外探测器系统，设计了一种无需衬底温度稳定器——热电制冷器(TEC)的读出电路(ROIC)结构.首先分析了衬底温度对微测辐射热计的特性的影响，利用ROIC对衬底温度变化引起的微测辐射热计的特性的变化进行补偿，实现ROIC的输出信号与衬底无关.该ROIC已在0.5 μm CMOS工艺下成功流片，并应用了到阵列大小为320×240的非制冷微测辐射热计焦平面上.测试结果表明: 在衬底温度变化20 K时，ROIC输出信号仅变化2 mV，实现了去除TEC后衬底温度补偿的功能，有效地降低了系统功耗.该ROIC在低功耗，小体积的非制冷红外探测器上有着广泛的应用.
In order to quantitatively understand impulsively loading mechanism of a point pyrotechnic separation device,the finite element models of three processes including explosion,strain energy release and impact were built,respectively.The three different physical processes and the induced responses were investigated,and t…
The phenolic resin carbon-coated microcrystalline graphite,as anode materials for lithium-ion battery,was prepared by being coated with phenolic resin carbon by immersion method,following with carbonization.The influences of the content of phenolic resin carbon on the structure and electrochemical performances of micr…
Metal hydrides(Mg(BH4)2 and MgH2) with high heat values are expected to improve the explosion properties of RDX.However,they bring safety problems at the same time.In order to explore the consistencies between RDX and these two kinds of metal hydrides,the DSC was used to study the thermal decomposition characteristics…
In order to investigate monitoring methods of sulfur corrosion in transformer,the copper content in oil and the sulfur-corrosion test results of 40 operating transformers were compared.Moreover,dynamic copper strip corrosion was tested by simulation in transformer oil samples filled with nitrogen,air and oxygen,respec…
A review was provided of the research progress of the inhibition mechanism of benzotriazole (BTA) as corrosion inhibitor for copper. The surface structure and composition as well as the corrosion inhibition type of protective films of BTA formed in acidic medium, nearly neutral medium and alkaline medium were highligh…
Catalytic reduction of NO by metallic iron mesh roll was experimentally studied in a horizontal ceramic tubular reactor.The NO reduction efficiency was tested in the temperature range of 300-1 100 ℃ in the atmospheres of CO,O2,CO2 and simulated flue gas respectively.The results show that metallic iron is very effectiv…
The construction and main constituent of the integument of Eriocheir sinensis were studied by the methods of histochemistry and atomic absorption methods.The results showed that the integument of E.sinensis was composed of four sub-layers from the exterior to the interior: an epicuticle,an exocuticle,an endocuticle,an…
In this paper, bile acids' retention parameter, R(M), obtained in normal phase thin-layer chromatography is determined as a function of the temperature (293-323 K). Analyzed bile acids belong to congeneric group with two oxygen atoms (OH or oxo groups) on the steroid core and congeneric group with three oxygen atoms.…
This chapter presents three contemporary applications of natural rubber. In the first application, natural rubber membranes with gold nanoparticles were placed in the culture medium and the physiological behaviour of Leishmania braziliensis promastigotes evaluated. The natural rubber membranes containing AuNPs decreas…
Using isothermal compression test and quantitative metallographic analysis,the deformation behavior and microstructure evolution of as-extruded aluminum alloy 7075 were studied within a temperature range of 250-450 ℃ and a strain rate range of 0.01-10s-1.The true stress—strain curves,average grain size,recrystallized…
ZnSnO3 one-dimensional (1D) strutures were synthesized by using an evaporation technique. The morphology, crystal structure, and enhanced sensing properties of the ZnSnO3 structures functionalized with Pd to CO gas at 300 degrees C were investigated. The diameters of the 1D structures ranged from a few hundreds to a f…
Ca-K codoped La0.64Ca0.25K0.11MnO3 nanocrystals with rhombohedral structure were synthesized in a molten KOH system at temperature as low as 500 ℃ in the atmosphere of Ar.The starting materials were MnO2,Ca(OH)2 and La(OH)3.Mn oxidation state and magnetic properties of La0.64Ca0.25K0.11MnO3 were discussed.XPS results…
To understand the effect of water-cut sheds on flashovers of contaminated hollow core insulators in heavy rain,we performed simulative experiments.Taking 5-meter-long hollow core porcelain insulators for examples,we experimentally simulated flashovers on the samples in heavy rain,and measured the characteristics of th…
In order to enhance the utilization of kenaf stems, chemical stabilities against hydrothermal reactions were compared between core parts and bast ribbons. With increasing the treatment temperature, hemicellulose fractions contained in the intercellular matrix regions were preferentially decomposed. This tendency was m…
This work reports the design and use of a laboratory-scale tribometer and a new developed tool-holder to reproduce the industrial polishing process for ceramic tiles in laboratory-scale. The mechanical conditions in a typical industrial polishing process were used to execute the tests in industrial-scale on a single p…