液晶与显示2017，Vol.32Issue(6)：467-473,7.DOI:10.3788/YJYXS20173206.0467
纳米MgO晶体制备及其二次电子发射系数理论研究
Preparation of MgO and mechanism analysis of secondary electron emission coefficient
摘要
Abstract
In this work, the direct precipitation method was used to generate magnesium salt Mg(OH)2, the process of preparing MgO crystal by calcining Mg (OH)2 in three stage temperature was studied, and MgO crystal was characterized by scanning electron microscope and XRD.On this basis, the energy band structure and states density of MgO crystal were calculated by the first principle theory, the influence of crystal orientation on MgO secondary electron emission was analyzed.The experimental results show that the MgO prepared by this method is cubic crystal.The grain size is evenly distributed in the vicinity of 40.65 nm.The crystal orientation is of (200), (111), (220) and along the (200) orientation preferential growth.Among three kinds of common crystal orientation which are (110), (110) and (111), the surface (110) orientation of the MgO crystal with the lowest band gap, the two electron emission coefficient of the material surface is relatively high.关键词
MgO晶体/二次电子发射系数/第一性原理/直接沉淀法Key words
MgO crystal/secondary electron emission/first principle theory/direct precipitation method分类
信息技术与安全科学引用本文复制引用
韦海成,许亚杰,肖明霞,吉文欣..纳米MgO晶体制备及其二次电子发射系数理论研究[J].液晶与显示,2017,32(6):467-473,7.基金项目
国家自然科学基金项目 (No.61461001) （No.61461001）
宁夏自然科学基金重点项目 (No.NZ13083)Supported by National Natural Science Foundation of China(No.61461001) （No.NZ13083）
National Natural Science Foundation of NingXia(No.NZ13083) （No.NZ13083）
