摘要 |
PURPOSE:To obtain the titled composition having small variability of resistance value and thermistor constant and small change of resistance value with time, by adding Bi as a secondary component to a main component consisting of Mn, Co, Ni and Cu. CONSTITUTION:A main component consisting of oxides of metallic elements of Mn, Co, Ni and Cu such as MnO2, CoO, NiO and CuO is blended with 0.1-10mol.% Bi element (e.g. Bi2O3) as a secondary component and, if necessary, 0.1-10atom.% of one or more elements selected from Li, B, Mg, Al, Si, Ti, V, Cr and Zn. |