期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
IONIC CONDUCTIVITIES OF SEGMENTED POLYETHER POLYURETHANEUREA COMPLEXES WITH LiClO_4
1
作者 顾庆超 徐炜政 +1 位作者 叶温温 莫天麟 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1991年第3期189-194,共6页
Ionic conductivity values for segmented polyether polyurethaneurea (PEUU) complexes with LiClO_4 were determined and values as high as~1.1×10^(-4) S·cm^(-1) at 353K and~1.0×10^(-5)S·cm^(-1) at 30... Ionic conductivity values for segmented polyether polyurethaneurea (PEUU) complexes with LiClO_4 were determined and values as high as~1.1×10^(-4) S·cm^(-1) at 353K and~1.0×10^(-5)S·cm^(-1) at 306K were achieved. The ionic conductivity data were analyzed using the VTF (Vogel-Tamman-Fulcher) equation and WLF (Williams-Landel-Ferry) type equation. Values have been estimated for the 'apparent' activation energies of ion transport from VTF equation and they lie in the range 2.70—5.53 kJ·mol^(-1). 展开更多
关键词 Segemented polyether polyurethaneureas Complex: Solid ionic conductor Ionic conductivity VTF (Vogel-Tamman-Fulcher) equation WLF equation
下载PDF
西门子贴片机贴装0402元件工艺控制
2
作者 苟弘昕 《现代表面贴装资讯》 2007年第5期17-20,共4页
西门子贴片机器使用率在SMT行业中增加,0402物料的贴装还是一个主流,本文就siemens机器如何成功的贴装0402元件的工艺介绍给大家。
关键词 飞达 西格玛(SEGEMENT) 模板
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部