Temperature Sensitive Properties of the La(TixMn1 − x)O3 System

The electrical mechanisms of perovskite-type LaMnO3 were investigated with B-site substitution. Samples of La(TixMn1-x)O3 (x = 0.1-0.7) were sintered at different temperatures. The voltage-temperature (V-T) curves of the samples were tested from room temperature to 300 C, then the electrical properties were measured and analysed. The experimental results showed that the resistivity-temperature (rho-T) curves of the samples matched NTC characteristic. The resistivity increased slightly with the increase of Ti amount as x was < 0.5, however, it rose greatly after x was > 0.5; The sintering temperatures have little influence on the resistivity, except for the sample with x = 0.7. 6 refs.