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Citation: Yang Xiaojuan, Liu Ersheng, Chen Naisheng, Huang Jinling. Preparation and Gas sensitivity of Several-Spinel type Nanocrystalline Mixed Oxides[J]. Chinese Journal of Applied Chemistry, ;1998, 15(5): 14-17. shu

Preparation and Gas sensitivity of Several-Spinel type Nanocrystalline Mixed Oxides

Research Institute of Functional Materials, Fuzhou University, Fuzhou 350002

Received Date: 19 November 1997
Revised Date: 17 June 1998

Four spinel-type mixed oxide nanocrystalline powders MFe₂O₄(M=Cu²⁺, Zn²⁺, Cd²⁺ and Mg²⁺) were prepared by chemical coprecipitation method. The products were characterized by means of powder XRD, TEM and specific surface area measurements. The results reveal that the samples are nanocrystalline powders with high specific surface areas. Their gas sensitivities to reductive gases depend on their specific surface area: the larger the specific surface area, the higher the sensitivity.
- spinel-type mixed ferric oxide,
- nanocrystalline,
- preparation,
- gas sensitivity
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