摘要
研究了以 Ａｌ（ＮＯ３）３·９Ｈ２Ｏ和ＮＨ３·Ｈ２Ｏ溶液为原料，采用高纯氧化铝球磨原位引入晶种和添加 ＺｎＦ２、 ＡｌＦ３的制备工艺．通过提高凝胶中晶种的均匀性和加速相转变时物质的扩散和传输，可降低过渡型氧化铝向α型氧化铝相转变温度，所制铝凝胶经９００～９２０℃煅烧可获得平均粒径＜５０ｎｍ的α型纳米氧化铝．
Alpha alumina nanocrystalline powders, with mean particle size less than 50nm, were prepared by a novel synthesis process using Al(NH3)(3). 9H(2)O and NH3.H2O solutions as raw materials. The process mainly utilized a seed-effect of fine grains worn from the milling mediums and also utilized ZnF2 or AlF3 additives. The phase transformation temperatures to alpha alumina can be reduced dramatically to 900 similar to 920 degreesC by improving the homogeneity of seeds with the hydrous alumina and accelerating the mass diffusivity and transportation in the transformation process.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第2期349-352,共4页
Journal of Inorganic Materials
