文献类型：期刊文献

中文题名：共沉淀法制备复合Al_2O_3-Cr_2O_3超微粒子粉末

英文题名：Preparation of Al_2O_3-Cr_2O_3 Ultrafine Powders by Co-precipitation Method

作者：顾燕芳[1];胡黎明[1];熊玉梅[1];陈敏恒[1]

机构：[1]华东化工学院技术化学物理研究室国家重点固定床反应工程实验室

年份：1992

卷号：18

期号：4

起止页码：525

中文期刊名：华东化工学院学报

收录：Scopus;CSCD:【CSCD2011_2012】；

基金：国家自然科学基金

语种：中文

中文关键词：共沉淀;超细粉;氧化铝

外文关键词：co-precipitation; composition; ultrafine powders; aluminium oxide; chromium; particle size and distribution

摘要：探讨了文题的方法,研究了溶液的pH值、反应物浓度及配比、反应温度对合成的Al_2O_3-Cr_2O_3粒子的粒径、粒径分布以及组成的影响规律。结果表明,合成粒子的最佳pH值范围为4.4～5.0;粒子的组成仅取决于反应物初始浓度的配比,改变反应物初始浓度及配比可以十分有效地控制粒子的性能;反应温度对粒子的粒径及分布影响很小。制得的复合Al_2O_3-Cr_2O_3超微粒子呈球形、组成均一。
Inflences of the pH value of solution, reactants concentration as well as their ratio and reaction temperature on the particle size, distribution and composition were studied. It showed that the pH value in reaction system should lie in the range of 4.4 to 5.0; the particle composition depended only on the initial ratio of reactants; the properties of particles could be controlled effectively by altering the concentration and ratio of the reactants; the reaction temperature had less effect on particle size and distribution. The composite Al_2O_3Cr_2O_3 ultrafine powders synthesized were spherical with homogeneous composition.