| 摘要 |
PURPOSE:To obtain the titled composition providing a high-precision thermistor having small variability of resistance value, change thereof with time and B constant and stability, by adding a specific amount of Bi oxide as a secondary component to oxides of Mn and Co as a main component and sintering. CONSTITUTION:Oxides of elements of a composition which comprises Mn and Co as metallic elements as a main component and, if necessary, 0.1-10atom.% component of one or more elements of Li, B, Mg, Al, Si, Ti, V, Cr and Zn are blended with Bi oxide in a amount corresponding to 0.1-10mol.% Bi element as a secondary component, calcined at 700-800 deg.C and ground by a ball mill, etc. Then the calcined and ground powder is incorporated with about 10% PVA solution, granulated, press molded into a disc shape, etc., and sintered at 1,000-1,200 deg.C. |
