纳米铝粉对氧化铝陶瓷晶粒形态的影响  

Effect of Aluminum Nanopowder on Growth and Morphology of Alumina Grain

作　　者：张新霓[1,2] 谢志鹏[1] 徐利华[3] 

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084 [2]青岛大学,山东青岛266071 [3]北京科技大学,北京100083

出　　处：《稀有金属材料与工程》2009年第A02期172-174,共3页Rare Metal Materials and Engineering

基　　金：国家支撑计划(2006BAB12B03)

摘　　要：通过改变氧化铝粉体中纳米铝粉含量,研究了纳米铝粉对烧结氧化铝晶粒形态的影响。当铝粉质量分数为0.01%和0.1%时,氧化铝的晶粒分布具有双峰结构,部分晶粒为长柱状和板状晶粒,而当铝粉质量分数为0.5%时,整个氧化铝晶粒都呈现均匀、等轴结构,其与氧化镁的作用相类似。The microstructural evolution during sintering of A1203 was investigated to determine the role of Al nanoparticles. Compared with specimens without Al, a few platelike Al2O3 grains were observed with the addition of 0.01% and 0.1% （mass fraction） Al nanoparticles. When Al content was increased to 0.5%, a fine, equiaxed and homogeneous grained microstructure was obtained. This effect of Al on the microstructure of the sintered Al2O3 is similar to that of MgO.

关 键 词：氧化铝 长柱状晶粒 纳米铝粉 生长机制 

分 类 号：TQ174.1[化学工程—陶瓷工业]