共沉淀法制备(Ni,Zn)Fe_2O_4纳米复合材料及其特性研究  

PREPARATION OF NANOCRYSTALLINE(Ni,Zn)Fe_2O_4 COMPOSITE MATERIAL WITH COPRECIPITATION AND ITS CHARACTERISTICS

作　　者：方静华[1] 项金钟[1] 胡永茂[1] 信思树[1] 李茂琼[2] 吴兴惠[1] 

机构地区：[1]云南大学材料科学与工程系,昆明650091 [2]大理学院物理系,大理671000

出　　处：《复合材料学报》2004年第1期12-16,共5页Acta Materiae Compositae Sinica

基　　金：云南省自然科学基金重点项目(2001E0003Z)

摘　　要：　以FeSO4·7H2O、NiSO4·6H2O和ZnSO4·7H2O为原料,通过共沉淀法先制备出晶粒细小的碱式碳酸盐前驱体,在不同的温度下焙烧1h,制备出(Ni,Zn)Fe2O4纳米晶复合材料,利用XRD和TEM等方法对样品进行了分析表征;并考察了其气敏特性和红外吸收性能。结果表明:(Ni,Zn)Fe2O4在500℃下开始固相反应并结晶成为纳米晶体,在800℃下晶粒尺寸约为50nm。By using FeSO4&middot7H2O, NiSO4&middot6H2O and ZnSO4&middot7H2O as raw materials, with a coprecipitation method, the basic carbonate precursor containing fine crystalline grain is synthesized and nanocrystalline (Ni, Zn)Fe2O4 composite particles followed by sintering for one hour can be obtained. The microstructure was measured by using XRD and TEM. The infrared absorption and gas-sensitization of the samples have been investigated. The results show that the diameter of the nano-particles is about 50 nm at 800°C.

关 键 词：共沉淀法 (Ni Zn)Fe2O4 纳米晶体 复合材料 

分 类 号：TQ138.11[化学工程—无机化工] O782.1[理学—晶体学]