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Phase and structure of polycrystal Sr_(0.69) La_(0.31)F_(2.31)+SrS solid electrolyte material
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作者 Tian Yanwen(田彦文), Ma Ping(马 平), Zhang Xin(张 新), Zhai Yuchun(翟玉春) School of Materials and Metallurgy, Northeastern University, Shenyang 110006, P. R. China 《中国有色金属学会会刊:英文版》 CSCD 1999年第3期541-545,共5页
The phase and the structure of polycrystal material, which was prepared by calcining the co precipitated fluoride powder of Sr and La with a ratio of 0.69∶0.31 mixed with SrS powder, were investigated by X ray diffra... The phase and the structure of polycrystal material, which was prepared by calcining the co precipitated fluoride powder of Sr and La with a ratio of 0.69∶0.31 mixed with SrS powder, were investigated by X ray diffraction and electron probe scanning. In the materials, three phases were found, they are Sr 0.69 La 0.31 F 2.31 solid solution phase with a pure SrF 2 cubic structure whose lattice constant is 5.843 ?, SrS single phase with a NaCl cubic structure, and an unknown phase that is produced by the interaction of SrS and co precipitated powder. It was also found that SrS has no influence on the structure of Sr 0.69 La 0.31 F 2.31 solid solution. 展开更多
关键词 X ray diffraction electron probe POLYCRYSTAL SR 0.69 LA 0.31 F 2.31 +SrS material PHASE STRUCTURE
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航嘉新版ATX12V 2.31电源解析——让我们的电源更环保
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作者 雷军 《微型计算机》 北大核心 2008年第10期66-66,共1页
2008年年2月23日.Intel全球发布了最新的PSDG(《桌面平台电源设计指南》)1.2版规范。在新版本的PSDG中ATX12V规格的版本号由2.3升级到了2.31。
关键词 环保 电源 航嘉磐石400ATX12V2.31 航嘉磐石355UATX12V2.31
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更省更强大AT×12V 2.31版规范解析国内首发
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《现代计算机(中旬刊)》 2008年第3期82-83,共2页
作为电源行业的标准,ATX12V规范在规范电源设计和提高电能效率具有非常积极而重要的作用。目前,ATX12V 2.3版是这一规范的最新版本,与旧版规范相比,其要求更加严格,也更加符合当前电脑配件的功耗水平,在新规范发布之后得到了各... 作为电源行业的标准,ATX12V规范在规范电源设计和提高电能效率具有非常积极而重要的作用。目前,ATX12V 2.3版是这一规范的最新版本,与旧版规范相比,其要求更加严格,也更加符合当前电脑配件的功耗水平,在新规范发布之后得到了各路厂商的鼎力支持。 然而,在2.3版规范发布后不到一年时间,Intel又将ATX12V规范升级至2.31版,这又将给电源带来哪些变化呢? 展开更多
关键词 ATX12V2.31版规范 国内 电源设计 INTEL 最新版本 电脑配件
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Nanosized complex fluorides based on Eu^(3+) doped Sr_2LnF_7(Ln=La, Gd) 被引量:9
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作者 M.Runowski S.Balabhadra S.Lis 《Journal of Rare Earths》 SCIE EI CAS CSCD 2014年第3期242-247,共6页
A simple co-precipitation approach taking place between Ln3+, Sr2+ cations and F anions, led to the formation of nanocrystalline Eu3+ doped Sr2LnF7 (Ln-La and Gd) complex fluorides. The reaction was carried out i... A simple co-precipitation approach taking place between Ln3+, Sr2+ cations and F anions, led to the formation of nanocrystalline Eu3+ doped Sr2LnF7 (Ln-La and Gd) complex fluorides. The reaction was carried out in the presence of polyeth- ylene glycol, PEG 6000 as a surfactant/surface modifier, providing small size and homogeneity of the products. The synthesized compounds were composed of small nanoparticles with an average size of 15 nm. All obtained Eu3+ doped compounds exhibited an intensive red luminescence. In the case of gadolinium based compounds, the energy transfer phenomena could be observed from Gd3+ ions to Eu3+ ions. In order to study the structure and morphology of the synthesized fluorides, powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements were performed. Also FT-IR spectra of the products were re- corded, revealing the presence of PEG molecules on the nanoparticles suN'ace. A spectrofluorometry technique was applied to examine optical properties of the synthesized nanoparticles. Excitation and emission spectra as well as luminescence decay curves were measured and analysed. The performed analysis revealed a red luminescence, typical for the Eu3+ ion situated in the inorganic, highly symmetric matrix. Concentration quenching phenomena and lifetimes shortening, together with an increasing of the Eu3+ doping level, were observed and discussed. Judd-Ofelt analysis was also performed for all doped samples, in order to support the registered spectroscopic data and examine in details structural and optoelectronic properties of the synthesized nanomaterials. 展开更多
关键词 luminescence Eu3+ doping complex strontium lanthanide fluorides nanoparticles Sr2LnF7 Sr0.69La0.31F2.31 rare earths
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