共搜索到4062条信息,每页显示10条信息,共407页。用时:0小时0分0秒234毫秒
......
......
......
......
Preparation of high-purity bismuth by sulphur deleadization in vacuum distillation XIONG Li-zhi(熊利芝)1, HE Ze-qiang(何则强)1, LIU Wen-ping(刘文萍)1, MA Cheng-jin(麻成金)1, DAI Yong-nian(戴永年)2 (1. College..., China) Abstract: The feasibility of separation of impurities in refined bismuth and sulphur deleadization with vacuum distillation was studied theoretically. Experimental studies on sulphur......
......
Purification of indium by vacuum distillation and its analysisLI Dong-sheng(李冬生)1,2,3, DAI Yong-nian(戴永年)1,2,3, YANG Bin(杨斌)1,2,3, LIU Da-chun(刘大春) 1,2,3, DENG Yong(邓勇) 1,2,3(1. National...% or 5N, mass fraction) indium (In) was obtained through vacuum distillation using a 2N (99%) In as input material under a dynamic vacuum of 5 Pa. The glow discharge mass spectrometry (GDMS) was applied......
......
......
......