常压化学气相输运法合成Zn_(1-x)Co_xO晶体

Zn_(1-x)Co_xO Crystal Synthesized by Chemical Vapor Transport

本文采用高温化学气相输运法,温度970℃,在蓝宝石和石英基片上制备Zn1-xCoxO晶体。电子扫描显微镜(SEM)观察发现,蓝宝石晶片上的晶体形貌较S iO2晶片上的规整,晶体呈现六棱柱或六棱锥体,一般显露柱面m{101-0}、正锥面p{101-1}、负极面c{0001-}和正极面c{0001},晶体表面光滑。在石英基片上得到的Zn1-xCoxO晶体生长的棱面较模糊,基片的部分晶体非定向密集生长,连续形成薄膜结构。X衍射证实晶体为ZnO纤锌矿结构。X光能谱(EDS)测量表明ZnO晶体有钴离子的存在,且浓度随原料中的Co2O3:ZnO的比值增大而增加。

Zn（1-x）CoxO crystals were synthesized by chemical vapor transport method at 970℃ on the sapphire substrate and quartz substrate, respectively in this paper. By SEM, it is found that Zn（1-x）CoxO crystals surface tend to be smooth, the crystal hexagonal structures tend to be asymmetric, and the conical area reduces, when the substrate was sapphire. When the substrate was quartz, the prism planes of Zn（1-x）CoxO crystals is fuzzy. By non-oriented dense growth, continuous films was formed and prism planes was appeared at the edge of quartz substrate. The content of Co in ZnO crystal can be measured by X-ray energy spectrum.