| 摘要 |
PURPOSE:To lower a value of resistance of a thick film thermistor by adding composite oxide wherein a compound of Cu or CuO and a bivalent element is mixed and sintered as a second conductive material further to a thick film thermistor material comprising metal oxide having thermistor characteristics, a first conductive material composed of RuO2 and glass. CONSTITUTION:A thick film thermistor composition comprises at least two kinds of metal oxide having thermistor characteristics selected among oxides of Mn, Co, Fe and Ni, RuO2 being a first conductive material, a composite oxide wherein a compound of Cu or CuO and a bivalent element is mixed and sintered as a second conductive material, and glass. In this case a value of resistance can be lowered and the thermistor is free from dropping in a B constant and lack of heat-resistance stability unlike a case where Cu is directly added. Thus a thick film thermistor with low resistance and a high B constant and having a small change rate in a value of resistance against heat can be obtained. |
