Synthesis of Calcium Chloroborate Whiskers Via Sedimentation and Sintering Process  

作　　者：朱东海 NAI Xueying 兰生杰 DANG Li LIU Xin 李武 

机构地区：[1]State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China [2]Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China [3]School of Chemical Engineering, Qinghai University, Xining 810016, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2017年第5期1067-1071,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.51402323);the West Light Foundation of the Chinese Academy of Sciences(No.Y412031006);the Natural Science Foundation of Qinghai Province,China(No.2014-ZJ-938Q)

摘　　要：Single crystalline calcium chloroborate（Ca2B5O9Cl） whiskers with uniform diameter have been fabricated by a two-step process. The precursor was firstly prepared by the sedimentation reaction between CaCl2, H3BO3 and Na OH aqueous solutions, and then sintered at different temperatures for 6 h with KCl as flux. The XRD indicates that the product synthesized at 600 °C is Orthorhombic Ca2B5O9Cl. SEM and TEM results show that the Ca2B5O9Cl is whisker with the diameter about 0.2-0.5 μm and the length up to 15 μm. SAED analysis shows that the whisker is single crystalline and grows along [001] direction. The possible formation process and growth mechanism were proposed.Single crystalline calcium chloroborate（Ca2B5O9Cl） whiskers with uniform diameter have been fabricated by a two-step process. The precursor was firstly prepared by the sedimentation reaction between CaCl2, H3BO3 and Na OH aqueous solutions, and then sintered at different temperatures for 6 h with KCl as flux. The XRD indicates that the product synthesized at 600 °C is Orthorhombic Ca2B5O9Cl. SEM and TEM results show that the Ca2B5O9Cl is whisker with the diameter about 0.2-0.5 μm and the length up to 15 μm. SAED analysis shows that the whisker is single crystalline and grows along [001] direction. The possible formation process and growth mechanism were proposed.

关 键 词：single crystal growth Ca2B5O9Cl whiskers microstructures 

分 类 号：O78[理学—晶体学] TQ132.32[化学工程—无机化工]