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Anneal and Concentration Effect on PL Properties of Sol-Gel Derived Eu3+ Doped SiO2 Glass Zhu Huiqun1,Wang Yi1,Ling Langsheng2,Ding Ruiqin1 (1.Institute of Thin Film and Nano Materials, Wuyi... anneal temperatures, and the optimized anneal temperature is observed around 700 ℃. The fluorescence-quenching effect can be observed in the emission spectra when the annealing temperature exceeds 700......
obviously with increasing the radius of alkali-earth metal ions; the mixed alkali effect appears when the glass contains a few kinds of alkali-earth metal oxides; when K+, Na+ and Li+ exist simultaneously in the glass, the two minimum peaks and complex mixed alkali effect can be observed from the composition-thermal expansion coefficient curve. Key words: glass; thermal expansion coefficient; mixed......
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force reduction from the tests, which suggests that softening effect may be one of the other reasons to reduce the force. Key words: ultrasonic vibration; compression; stress superposition; friction effect 1 Introduction Nowadays ultrasonic vibration has been widely used in metallurgy, welding, machinery, food processing and chemical industry. Lots of researches on ultrasonic vibration assisted......
with particles is similar to that of covering ratio of the duct in the section. The down-horn effect of caliber changes with D/d, i.e. the smaller D/d, the more obvious the down-horn effect of caliber. Key words: particles; duct; size of nature; size effect 当今微米/纳米尺度的物理现象,微电子机械系统,"纳米器件",微尺度传热和流体运动等越来越引起人们广泛的关注. 在微尺度研究领域, 尺度效应是一个非常重要的概念[1-9].在此, 作者对粒子通过管道的过程进行分析, 描述粒子和管道的特征长度, 讨论粒子通过管道时两者特征尺度之间的相互关系, 探讨粒子......
, respectively. Addition of I- ion greatly improves the inhibition efficiency of fenugreek seeds extract for Zn corrosion in HCl due to the synergistic effect. Potentiodynamic polarization and EIS... of fenugreek. Key words: zinc; corrosion mechanism; inhibitor; synergetic effect 1 Introduction Due to environmental regulations, plant extracts have again become important as they are environmentally......
Trans. Nonferrous Met. Soc. China 24(2014) 3732-3738 Capping effect of reducing agents and surfactants in synthesizing silver nanoplates Yang YAN, Ke-bin CHEN, Hao-ran LI, Wei HONG, Xiao-bin HU, Zhou XU State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China Received 16 December 2013; accepted 12 September 2014 Abstract: The effect of reducing agents......
of Springer Nature 2020 Abstract: We have established an elastoplastic analysis model to explore the effect of loading path in an incompressible thin-walled tube under the combined action of axial..., and the plastic stress-strain relationship of twelve stress paths in different stress areas is derived. The "primary effect" of the stress path on plastic strain is demonstrated, namely, the plastic strain......
: The macro scale fabrication of high performance metals with nano-structure and nano effect and the revelation of the characteristic of microstructure evolution to the functional regulation are the major... for the applications were proposed. Key words: metal nano-materials; composites; interface; size effect 金属材料的力学性质和物理性质在很大程度上依赖于其组织的特征尺度,典型的特征尺度是晶粒尺寸.通常情况下,对于纯金属和单相固溶体合金,传统的Hall-Petch关系σy=σ0+Ad-1/2(其中σy是屈服强度......
and the electrodeposited pure Ni coating were comparatively investigated in order to elucidate the effect of CeO2 at different temperatures and also CeO2 contents on the oxidation behaviour of Ni-CeO2...; nanocomposite coating; oxidation; reactive-element effect 1 Introduction The composite electrodeposition technique is a low-cost and low-temperature method suitable for producing metal matrix composite......
