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+.
出处
《波谱学杂志》
CAS
CSCD
1996年第3期277-282,共6页
Chinese Journal of Magnetic Resonance
关键词
ESR
结构相变
硫化锌
微晶
Zns:Ag crystallite, ESR of Mn￣(2+),Structure phase transformation, Reversed transformation
