硼化锆陶瓷前驱体法制备及其表征  

Preparation of Zirconium Diboride Ceramic via Liquid Precursor Route and Its Characterization

作　　者：李运涛[1] 陶雪钰[2] 邱文丰[2] 赵京波[1] 赵彤[2] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]中国科学院化学研究所高技术材料实验室,北京100190

出　　处：《化学研究》2010年第4期27-29,共3页Chemical Research

摘　　要：以聚乙酰丙酮锆(PZO)、硼酸、酚醛树脂为原料制备得到硼化锆液相前驱体;在1 400℃和氩气保护下使硼化锆前驱体发生碳热还原反应,得到硼化锆陶瓷.采用热重分析仪、X射线衍射仪、电感耦合等离子体发射光谱仪、扫描电镜表征了硼化锆前驱体及热解陶瓷产物.结果表明,在相对较低的温度(1 400℃)下热解得到的硼化锆陶瓷纯度较高;硼化锆陶瓷材料整体呈小块状,由硼化锆晶体层层堆积而成,其晶粒尺寸约为200 nm.Liquid phase precursor of zirconium diboride was prepared by using polyzirconoxane（PZO）,boric acid and phenolic resin as the starting materials.The precursor was pyrolyzed in flowing argon at elevated temperature of 1 400 ℃,generating ZrB2 ceramic.The precursor and its pyrolysis ceramic product were characterized by means of thermogravimetric analysis,X-ray diffraction,inductive coupling plasma emission spectrometry,and scanning electron microscopy.Results show that the ZrB2 ceramic prepared by thermolysis of zirconium diboride precursor at relatively low temperature（1 400 ℃） has high purity.The block-shaped bulk ceramic consists of layer-by-layer piled zirconium diboride,and its crystal size is about 200 nm.

关 键 词：硼化锆陶瓷 液相前驱体 碳热还原反应 制备 表征 

分 类 号：TQ174.75[化学工程—陶瓷工业]