| 摘要 |
PURPOSE:To provide high sensitivity to gaseous methane by using a compsn. contg. 0.1-50mol% tin, zirconium and titanium in total of additives respectively in terms of stannic oxide, zirconium oxide and titanium oxide as a gas sensitive element. CONSTITUTION:At least one among tin (Sn), zirconium (Zr) and titanium (Ti) are added as an additive to lithium ferrite (LiFe5O) contg. 0.005-10wt% sulfate ions. The compsn. contg. 0.1-50mol% said elements in total of additives respectively in terms of stannic oxide (SnO2), zirconium oxide (ZrO2) and titanium oxide (TiO2) is used as a gas sensitive element. Then the high sensitivity to gaseous methane is obtd. even at a relatively low operating temp. of 400 deg.C without adding any noble metal catalyst at all. |
