介绍了近年来γ－Fe2O3超微粉在制备方法上的新进展,以及用作气敏材料时，通过掺杂不同化合物以提高其相变温度和气敏性等。
The preparation methods of γ－Fe2O3 ultrafine powders in recent years are summarized. The mechanisms for improving gas－sensing properties and increasing the temperature of phase transition by doping different chemical compounds are described when γ－Fe2O3 is used as gas－ sensing materials.
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