Synthesis and Reaction Mechanism of ZrB2-Al2O3 Composite Powders by a Combinational Method of Sol-Gel and Aluminothermic Reduction

摘要：

　　ZrB2-Al2O3 composite powders are successfully synthesized via an improved sol-gel technique combined aluminothermic reduction at low temperature.The effects of heating temperature and Zr:B molar ratio on the purity of final powder have been studied.The formation mechanism of ZrB2-Al2O3 has been investigated.The results show that ZrB2-Al2O3 composite under optimal ratio (ZB6A0)could be obtained at 1100 ℃ for 2 h and the synthesized ZrB2 with an average grain size of 30 nm.Two routes can be described the formation mechanism:one was ZrO2 and Al reacted with amorphous B which produced from intermediate reaction.The other one was one was through the intermediate formation of Al3Zr, and then reaction reacted with amorphous B2O3.

关键词： ZrB2-Al2O3 Sol-Gel aluminothermic reduction Al3Zr

作者: SONG Shaolei LI Rong LU Fei ZHEN Qiang

作者单位: School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;Nano-Science & Nano-Science &Technology Research Center,Shanghai University,Shanghai 200444,China

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: 1-7

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）