纳米气体敏感材料的喷射共沉淀法制备及特性

Characteristic and preparation of nano gas sensitive materials by spraying coprecipitation

在化学共沉淀法的基础上进行改进,采用喷射共沉淀法,制备了ZnGa2O4和ZnFe2O4等一些具有良好形貌的纳米气敏功能材料。采用XRD、SEM和TEM进行结构分析的结果表明,喷射共沉淀法制备的纳米粉末颗粒细小均匀,形状完整。从流体力学角度分析了喷射共沉淀法中物质的输运和反应过程,并解释了试验结果。认为喷射共沉淀法是一种较好的制备纳米功能材料的方法,并对喷射共沉淀法原理进行了分析。

In this paper the coprecipitation was improved(called spraying coprecipitation)to pre-pare nano gas sensitive materials such as ZnGa 2 O 4 and ZnFe 2 O 4 .The structural analysis was done by XRD,SEM and TEM.The result shows that the size and the uniform of the material pre-pared by the spraying coprecipitation is better than ever.Transport and reaction process of spray-ing coprecipitation was analysed by hydrodynamics theory.Some experiments were explained.The principle of spraying coprecipitation was also discussed.