摘要
本文采用水热法,分别以ZnO、Zn(OH)2为前驱物,添加一定量的MnCl4.4H2O和CuSO4.2H2O, 3mol/LKOH作矿化剂,温度430℃,填充度35%,反应24h,制备了Mn、Cu共掺ZnO晶体。当前驱物为Zn(OH)2时,所得晶体大部分为短柱状晶体,显露正负极面{0001}、{0001-}、负锥面-p{101-1-}和柱面m{1-010},长度约为30 ～50μm。少部分晶体为单锥六棱柱状,显露正锥面p{101-1},柱面m{1-010},负极面-c{0001-},晶体的长度约为100μm,长径比为5:1。当ZnO用作前驱物时,短柱状晶体长度大约为10 ～30μm,晶体的六棱对称性都出现较大的偏差。X射线荧光能谱分析表明,前驱物为ZnO、Zn(OH)2时,Mn离子含量在分别为3.19%和1.62%原子分数,没有检测到Cu离子。虽然Mn、Cu离子的掺入会明显影响晶体形态,磁性测量显示掺杂Mn、Cu的ZnO仍为反铁磁。
In this paper, Mn, Cu co-doped ZnO crystals were synthesized by hydrothermal method with 3mol/L-1KOH as mineralizer, the fill factor of 35%, reaction temperature of 430℃, and time of 24h. When the Zn（OH）2 mixed with Mn, Cu were used as precursor, the shape of the most crystals was column. The positive polar ＋c{0001}, negative polar -c{0001^-}, negative pyramidal face -p{101^-1^-}, and column face m{1^-010} were exposed. The length of the column crystals was 30-50μm. Some of the crystals shape were hexagonal cone .The negative polar -c{0001^-}, positive pyramidal face ＋p{101^-1}, and column face m{1^-010} were exposed. The length of the hexagonal cone crystals was 100μm. And the length to the diameter was 5：1.When the ZnO mixed with Mn, Cu were used as precursor,the length of the column crystals was 10-30μm. The hexagonal shape of all the crystals became asymmetry. The concentration of Mn^2＋ in ZnO was 3.19at%,1.62at%, respectively,when the precursor was ZnO and Zn（OH）2 by the EDX. But the Cu ions were not found. Although the morphology of the crystals was affected by Mn, Cu doped, antiferromagnet was observed by the SQUID.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2007年第5期1155-1159,1165,共6页
Journal of Synthetic Crystals
基金
Project supported by the National Natural Science Foundation of China (No.2002158)
Natural Science Foundation of HebeiProvince (E2006001008,E200700019)
关键词
氧化锌
水热法
锰
铜
铁磁性
ZnO
hydrothermal method
Mn
Cu
ferromagnetism
