摘要
采用溶胶-凝胶(Sol-Gel)法制备了高纯高导热BeO陶瓷用MgO-Al2O3-SiO2系粉体助烧剂,并利用DSC和扫描电镜(SEM)对粉体助烧剂的热性能、形貌及其助烧效果进行了系统研究。研究结果表明,采用优化后的工艺,可制备出颗粒细小,熔点约1 370℃的MgO-Al2O3-SiO2系粉体。利用该粉体,在1 550℃左右空气中烧结出密度不小于2.93 g/cm3,热导率大于280 W/(m.K),抗折强度大于200 MPa的高性能高纯99BeO陶瓷材料。
A Sol-Gel process was adopted to prepare MgO-Al2O3-SiO2 compounds as sintering additives which can promote the sintering of beryllium oxide ceramics. The physical characteristics of the MgO-Al2O3-SiO2 sintering additive powders and the sintering promotion for beryllium oxide ceramics were also investigated systemically. The results show that the average particle size of the MgO-Al2O3-SiO2 ceramic additives is about 100 nm, and the melt point is ahout 1 370℃. Using the presented additives, advanced Beryllium oxide ceramics can he obtained when sintering at 1 550 ℃ with the density of above 2.93 g/cm^3 , the thermal conductivity of above 280 W/（m ·K）.
出处
《压电与声光》
CSCD
北大核心
2008年第1期61-63,66,共4页
Piezoelectrics & Acoustooptics
基金
国防基础科研资助项目
关键词
BEO
助烧剂
纳米
溶胶-凝胶法
beryllium oxide ceramics
sintering additive
nanometer
Sol-Gel process
