| 摘要 |
PURPOSE:To provide a zirconia solid electrolyte internal vessel containing Sc2O3 as an improved zirconia oxygen sensor which permits stable measurement of oxygen potential of alloys or molten metals having low melting point and low oxygen potential for an extended period. CONSTITUTION:A zirconia oxygen sensor, for measuring oxygen potential of alloys or molten metal 5 whose melting point is as low as 350-550 deg.C, comprises a reference electrode 2 forming a system including a metal which shows liquid phase at the temperature of measuring the molten metal 5 or the alloy and the oxides distributed in it, a vessel 1 of zirconia solid electrolyte containing 5-15mol%, Sc2O3 of (7-13)mol% desirable, being made to receive the system and contact the molten metal or the alloy, lead wires 3 and 4 connected to either the reference electrode 2 or the molten metal 5 or each alloy and a means 6 for measuring electromotive force between the lead wires 3 and 4. By using the zirconia solid electrolyte interval vessel 1 containing Sc2O3, oxygen potential of alloys or the molten metal 5 of low melting point and oxide potential can be stably measured for an extended period, more effectively as a zirconia oxygen sensor. |
