PREPARATION AND APPLICATION OF A LOW-B HIGH-RESISTANCE HIGH-TEMPERATURE THERMISTOR MATERIAL WITH WIDE TEMPERATURE RANGE

摘要

An object of the present disclosure is to provide the preparation and application of a low-B high-resistance high-temperature thermistor material with wide temperature range. The thermistor material uses CaCO₃, Y₂O₃, Nb₂O₅, CeO₂ and MoO₃ as raw materials. The Ca_1-yY_yMoO₄-xCeNbO₄ (1≤x≤3, 0.01≤y≤0.2) high-temperature thermistor material having low-B high-resistance and wide temperature region is obtained by mixing grinding, calcination, cold isostatic pressing, high-temperature sintering and coating electrode. The material constant B_{200° C./600° C.} is 1800 K-4000 K, and the resistivity at 25° C. is 8.0×10⁵ Ω·cm-6.0×10⁷ Ω·cm. The low-B high-resistance wide temperature range high-temperature thermistor material prepared by the disclosure has stable performance and good consistency. The thermistor material has obvious negative temperature coefficient characteristics in the range of 25° C.-1000° C. and is suitable for manufacturing wide temperature range high-temperature thermistor.