摘要
以四氯化锆为锆源,苯甲醇为碳源,分别采用对二甲苯,间二甲苯和二甲苯3种不同溶剂,有机合成高碳锆比(原子比28:1)碳化锆陶瓷的先驱体苯甲醇锆(benzyl alcohol zirconium,BAZ)。采用FT-IR对先驱体的基团结构进行表征,通过热重分析(TGA)和X射线衍射分析(XRD)对BAZ的耐热性和陶瓷转化过程进行研究。结果表明,采用不同溶剂制备的碳化锆先驱体在600～700℃时均全部热裂解,1 500℃完全热解为ZrC,其中采用对二甲苯溶剂制备的先驱体在氩气气氛下1 600℃保温1 h后的陶瓷产率最高,为51.8%,采用二甲苯溶剂制备的先驱体热裂解温度最高,为670℃。
Using zirconium tetrachloride as zirconium source,and benzyl methanol as carbon source,precursor benzyl alcohol zirconium(BAZ)of high carbon zirconium ratio(28:1 atomic ratio)zirconium carbide ceramic was prepared by 3 different solvents(p-xylene solvent,m-xylene solvent and xylene solvent).The structure of the BAZ was characterized by FT-IR.The heat-resistant property was studied by TGA and the transformation of ceramic was studied by XRD.The results show that all zirconium carbide precursors prepared by different solvents are pyrolysised during 600.700℃and turn to ZrC after 1 500℃heat treatment.The precursor prepared by p-xylene solvent has the highest ceramic yield of 51.8%after 1 600℃heat treatment with argon gas protection.The precursor prepared by xylene solvent has the highest pyrolysis temperature that is 670℃.
作者
李一鸣
苏哲安
杨鑫
黄启忠
邵俊杰
王宇杰
方存谦
LI Yiming;SU Zhean;YANG Xin;HUANG Qizhong;SHAO Junjie;WANG Yujie;FANG Cunqian(State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China)
出处
《粉末冶金材料科学与工程》
EI
北大核心
2019年第1期89-94,共6页
Materials Science and Engineering of Powder Metallurgy
基金
湖南省战略新兴产业科技攻关项目(2016GK4020)
关键词
碳化锆
高碳锆比
先驱体
陶瓷产率
热裂解
Zirconium carbide
high carbon zirconium ratio
precursor
ceramic yield
pyrolysis
作者简介
通信作者:黄启忠,教授,博士。电话:13607442795;E-mail:huangqz@csu.edu.cn.
