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Effect of CuO Addition on the Microstructural and Electrical Properties of Ni-Mn Oxide NTC Thermistor
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 Title & Authors
Effect of CuO Addition on the Microstructural and Electrical Properties of Ni-Mn Oxide NTC Thermistor
Kim, Kyeong-Min; Lee, Sung-Gap; Lee, Dong-Jin; Park, Mi-Ri;
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In this study, (x=0~0.25) specimens were prepared by using a conventional mixed oxide method. All specimens were sintered in air at for 12 h and cooled at a rate of to , subsequently quenching to room temperature. We investigated the structural and electrical properties of specimens with variation of CuO amount for the application of NTC thermistors. As results of X-ray diffraction patterns, all specimens showed the formation of a complete solid solution with cubic spinel phase. The relationship between ln and the reciprocal of absolute temperature(1/T) for the NTC thermistors was shown linearity, which exhibited the typical NTC thermistor properties. With increasing the amount of CuO, resistivity at room temperature, B-value, and temperature coefficient resistance decreased.
Negative temperature coefficient;Ni-Mn-Cu oxide;Electrical resistivity;Mixed-oxide method;
 Cited by
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