Abstract
Highly dense LaCrO3 negative temperature coefficient (NTC) thermistor ceramics by low-heating solid-state method have been successfully synthesized in air ambient. The X-ray diffraction analysis has shown that both of the calcined powders and as-sintered ceramics crystallize in a perovskite structure. The relative densities of the ceramics synthesized by Cr(NO3)3·9H2O and the ceramics synthesized by CrCl3·6H2O are 91% and 65%, respectively. The relationship between lnρ and 1000/T shows an approximate line in the measured temperature range. The values of ρ25 and B0/25 of the ceramics synthesized by Cr(NO3)3·9H2O and the ceramics synthesized by CrCl3·6H2O are 424.8 Ω cm, 3252 K and 1835.9 Ω cm, 3636 K, respectively.
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