Template Formation of Zinc Aluminate Micro-platelets from Molten Salt

摘要：

　　Zinc aluminate (ZnAl2O4) micro-platelets were synthesized by reacting equimolar ZnO and a-Al2O3 micro-platelets in a molten alkaline chloride (NaCl or KCl) or sodium sulphate salt at a relatively low temperature.ZnAl2O4 started to form at 800℃ and its amount increased with temperature rising whereas those of ZnO and Al2O3 decreased.KCl was found to be the most effective in accelerating the ZnAl2O4 formation among the three salts.Phase pure ZnAl2O4 micro-platelets were prepared after 3 h firing at 1100 ℃ in KCl or at 1200 ℃ in NaCl or Na2SO4.They, to a large extent, inherited morphologies and sizes of the original a-Al2O3 micro-platelets, indicating that a template formation mechanism dominated the molten salt synthesis process.

关键词： Zinc aluminate spinel Molten salt synthesis Micro-platelets Mechanism

作者: WU Feng HUANG Juntong LIN Liangxu LI Zhijian QU Dianli ZHANG Shaowei

作者单位: School of High Temperature Materials and Magnesite Resource Engineering,University of Science and Te College of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter EX4 4QF,U.K.

会议类型: 国际会议

会议名称: 第七届国际耐火材料学术会议(ISR2016)

会议地点: 西安

会议语种:英文

页码: 1-5

在线出版日期: 2016-09-20（万方平台首次上网日期，不代表论文的发表时间）