NTC thermistor material with high resistance value and high B value and preparation method thereof

The invention provides an NTC (Negative Temperature Coefficient) thermistor material with high resistance and high B value and a preparation method thereof. In the formula of the NTC thermistor material with the high resistance value and the high B value, Mn, Co and Fe metal oxides are used as a system, a spinel crystal phase structure is combined with crystal structures and electrical advantages of p-type semiconductors, amphoteric semiconductors and valence-control semiconductors, crystal structure simulation of a chip NTC high-resistance material is carried out according to crystal phase composition, and powder synthesis preparation tests prove that the NTC thermistor material with the high resistance value and the high B value can be used for preparing the NTC thermistor material with the high resistance value and the high B value. By adding a trace amount of Al2O3, SiO2, ZnO and other raw materials, grain refinement is promoted, the resistivity rho of the material is increased to 30000 omega.cm, and the