Abstract
The influence of Y 2O 3 addition on the electrical properties and the microstructure of BaTiO 3-based negative temperature coefficient (NTC) thermistors was studied. All the NTC thermistors prepared showed a linear relationship between log resistivity and the temperature, indicative of NTC characteristics. At a given BaTiO 3 and BaBiO 3 content, as the amount of Y 2O 3 in BaTiO 3-based ceramics thermistors increased, the resistivity decreased to a minimum value and then increased again. Similarly, Y 2O 3 addition had the same effect on the coefficient of temperature sensitivity for those samples.
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