摘 要：用化学沉淀法制备了纳米立方 NiO 的微粉‚研究了 介质 pH、不同沉淀剂和热处理温度对纳米 NiO 粒子大小和 聚结状态的影响。用 NaOH 作沉淀剂‚控制介质 pH 为9～ 10‚经270～300℃热处理4h‚制备得到粒子尺寸约5nm‚在 水中易重新分散的纳米 NiO 微粉。 

关键词：纳米 NiO；化学沉淀法；沉淀剂

Abstract：Nanosized NiO powders were prepared with the chemical precipitation method.The effects of pH,precipitant and heat treatment temperature on formation of nanosized NiO powders were researched.Nanosized NiO(～5nm)powders,which were redispersed easily in water,were obtained under following conditions:NaOH as precipitant,pH～10,heat-treatment temperature 270～300℃ for 4h.When H ₂C ₂O ₄(oxalic acid)was used as precipitant,the agglomeration between NiO particles was serious.

Keywords：nanometer NiO; chemical precipitation method; precipitant