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Citation: GE Xiu-Tao, HOU Chang-Ping, LIU Xing-Qin. Preparation and Gas-sensing Property of α-Fe₂O₃-MgO[J]. Chinese Journal of Applied Chemistry, ;2001, 18(10): 813-816. shu

Preparation and Gas-sensing Property of α-Fe₂O₃-MgO

1.
a Department of Chemistry, Chuzhou Normal College, Anhui 239012;
2.
b Department of Materials Science and Engineering, University of Science and Technology of China, Hefei

Received Date: 5 March 2001
Available Online: 12 July 2001
Fund Project:

α-Fe₂O₃-MgO powder was prepared by a chemical coprecipitation method. The preparation conditions, phase constitution, conductance and gas sensing properties were investigated. The results show that pure phase Mg-Fe₂O₄-MgO could be obtained when Mg(NO₃)₂ and (NO₃)₃ were mixed in 1:2 molar ratio of Mg²⁺ to Fe³⁺ and calcined at 500℃ for 4 hours. The Mg-Fe₂O₄-MgO is an n-type semiconductor. The sensor based on Mg-Fe₂O₄-MgO calcined at 600℃ for 4 hours exhibited high sensitivity and good selectivity to C₂H₅OH.
- Mg-Fe₂O₄-MgO,
- C₂H₅OH,
- gas-sensing property
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沈阳化工大学材料科学与工程学院沈阳 110142

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Preparation and Gas-sensing Property of α-Fe₂O₃-MgO