Enhanced anti-aging behaviors in cubic phase CeO2 induced BaSnO3 thermosensitive ceramics

The anti-aging ability is an important index to measure the temperature measurement application of thermo-sensitive materials. Herein, the BaSnO3 + xCeO2 (x = 0 %, 2 %, 4 %, 7 %) ceramics were synthesized via mixing BaSnO3 with CeO2. By combining with CeO2, some Ce4+ replaces Sn4+ to improve the phase structure stability, which improves the high-temperature stability of the thermosensitive ceramic, reducing the aging coefficient from 50 % to 2.5 %. Meanwhile, the resistivity decreases with the increase of CeO2 composition, which can be attributed to the increase of Ce3+ content, resulting in the increase of the number of small polaron. With the increase of x content, thematerial constant B500/850, activation energy Ea and resistivity p500 of the ceramic decrease. The B values and Ea values of the thermistors are in the range of 12341-17155 K and 1.06-1.48 eV, respectively. These results indicate that BaSnO3 + xCeO2 composites are potential candidates in high temper-ature NTC thermistor devices.