自蔓延高温合成Al2O3-TiB2多孔陶瓷  

Synthesis of Porous Al_2O_3-TiB_2 Ceramic by SHS

作　　者：李靓[1] 王建江[1] 李俊寿[1] 闫晋东[1] 郭焕升[1] 

机构地区：[1]军械工程学院先进材料研究所

出　　处：《科学技术与工程》2008年第7期1791-1794,共4页Science Technology and Engineering

基　　金：国家自然科学基金(50572122)资助

摘　　要：自蔓延高温合成(SHS)是制备多孔陶瓷的一种新兴方法,在SHS技术的基础上结合传统制备方法中的发泡技术,在原料中添加只有在高温条件下才能分解,并全部转化为气体的发泡剂,制备出了Al2O3-TiB2多孔陶瓷,并使用XRD进行了晶体结构分析。宏观和SEM观察测得Al2O3-TiB2多孔陶瓷具有毫米级和微米级的孔梯度,用阿基米德法测得其孔隙率为65.1%。热力学分析得到绝热燃烧温度为2 646 K。Porous Al2O3-TiB2 ceramic was prepared by Self-propagating High-temperature Synthesis （SHS） combined with foaming technique. The raw materials were A1, TiO2, and B2O3. Pores were formed by foaming agent which decomposed to gas in high temperature. Crystal structure was analyzed and characterized by XRD. Direct observation and SEM confirmed that porous Al2O3-TiB2 ceramic had pores gradient at millimeter level and micron level. Archimedean method showed that the porosity is 65.1%. Thermodynamic analysis indicated that adiabatic temperature is 2 646 K.

关 键 词：多孔陶瓷 自蔓延高温合成 发泡剂 

分 类 号：TB39[一般工业技术—材料科学与工程]