共沉淀法制备(Ni,Zn)Fe2O4纳米复合材料及其特性研究
PREPARATION OF NANOCRYSTALLINE(Ni,Zn)Fe2O4 COMPOSITE MATERIAL WITH COPRECIPITATION AND ITS CHARACTERISTICS1
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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1 h,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。Abstract: By using FeSO4·7H2O, NiSO4·6H2O and ZnSO4·7H2O as raw materials, with a coprecipitation method, the basic carbonate precursor containing very fine crystalline grain is first synthesized and then nanocrystalline (Ni,Zn)Fe2O4 composite particles followed by sintering for one hour can be obtained. The microstructure was measured by using XRD and TEM. And then, the infrared absorption and gas-sensitization of the samples have been investigated. The results show that the diameter of the nano-particles is about 50nm at 800℃.
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