溶胶－凝胶法合成纳米级ZnO超细粉末

Preparation of ZnO ultrafine powder by Sol-Gel method

用Ｚｎ（Ａｃ）２·２Ｈ２Ｏ为原料，通过溶胶一凝胶（Ｓｏｌ－Ｇｅｌ）法合成了纳米级ＺｎＯ超细粉末。研究了反应物浓度，溶剂和改性剂用量，以及溶胶剂种类对胶溶过程的影响。Ｚｎ（ＯＨ）２凝胶在４００℃下煅烧２小时后，可以得到结晶型圆球状纳米级ＺｎＯ超细粉，纯度为９９．２５％（ｗｔ），平均粒径为３０ｎｍ，粒径分布范围窄。

Abstract ZnO ultrafine powders have been prepared from Zn(Ac)2·2H2Oby Sol一Gel method.Effects of reactant concentration,amount of solvent and modifier,kinds of pep-tizator have been studied.After calcination at 400℃ and 800℃ for 2h,a crystalline sphericalZnO ultrafine powder with the average particle diameter of 30nm and purity of 99.25%canbe obtained.