ZnS：Ag的ESR及结构相变研究  

STUDY ON ESR AND STRUCTURE PHASE TRANSFORMATION IN ZnS: Ag

作　　者：候碧辉 眭云霞[1] 韩世莹[1] 李碧琳 郭常新[1] 

机构地区：[1]中国科学技术大学物理系,南京大学现代分析中心

出　　处：《波谱学杂志》1996年第3期277-282,共6页Chinese Journal of Magnetic Resonance

摘　　要：ＥＳＲ实验表明Ａｇ在ＺｎＳ微晶中是以Ａｇ＋离子的形式存在．没有测到Ａｇ２＋离子的信号．以Ｍｎ２＋为探针的ＥＳＲ和Ｘ射线衍射分析研究发现．在ＺｎＳ微晶由立方点阵（β相）变为六角点阵（α相）的结构相变中，Ａｇ＋离子对相变的影响与掺杂浓度和煅烧温度有关．当掺Ａｇ量为５×１０－４ｇ／ｇ时相变在１１００～１２００℃出现逆转现象．由Ｍｎ２＋的ＥＳＲ谱得出α相的朗德因子ｇ为２．００６，越精细常数ａ为６．７６ｍＴ，β相的ｇ为２．００２，ａ为６．８１ｍＴ．It was found with electron-spin-resonance(ESR) that the doped silver is Ag+,and no ESR signal or Ag2+ was observed in ZnS crystallite. With ESR of probe ion Mnn2+ and X-ray diffraction analysis, it was found that a structure phase transformation from cubic lattice(β phase) to hexagonal(α phase) in ZnS crystallite is affectd by doped amount of Ag+ ion and calcination temperature. There is a reverse transformation phenomenon when Ag+ doped amount is 5×10-4g/g and at 1100℃-1200℃.The Land factor g of α phase is 2.006,the hyperfine constant a is 6.76mT,the g of β is 2.002,a is 6.81 mT from ESR of the Mn2+.

关 键 词：ESR 结构相变 硫化锌 微晶 

分 类 号：O753.1[理学—晶体学] O482.4