| 摘要 |
Combustible gas detecting element for detecting the concentration of a combustible gas such as isobutane, ethane, propane and hydrogen. It comprises gamma -Fe2O3, gamma -Al2O3 and at least one of La, Ce, Pr and Nd in terms of La2O3, Ce2O3, Pr2O3 and Nd2O3, respectively. This gas detecting element is an improvement over gamma -Fe2O3, and is advantageous for its highly stable load life even under severe conditions of a high temperature and a high humidity and for its high sensitivity to a combustible gas.
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