The invention discloses a low-temperature-sintered BiFeO3-based high-performance negative-temperature-coefficient thermosensitive
ceramic material and a preparation method thereof. According to the preparation method, (1-x)BiFeO3-xMeMO3
powder is firstly synthesized, no SiO2 or a small amount of SiO2 is doped, and the SiO2-doped (1-x)BiFeO3-xMeMO3 thermosensitive
ceramic material is formed through
compression molding and
sintering. According to the low-temperature-sintered BiFeO3-based high-performance negative-temperature-coefficient thermosensitive
ceramic material prepared by the preparation method, the
sintering temperature is lower than 95 DEG C, the performance is stable, and shown by property tests, the following better comprehensive thermosensitive properties can be obtained: the thermosensitive constant beta25 / 85 is higher than 5,000 K, the room-temperature resistivity rho25 is lower than 1,000,000
ohm.cm, and the aging rate eta is lower than 5%. According to the preparation method, a traditional ceramic
solid phase
sintering preparation process is adopted, and the adopted process is relatively simple and stable, so that the preparation method has higher practicality and popularization and application prospects.