Abstract
Nickel manganite based negative temperature coefficient (NTC) thermistors have good temperature sensor characteristics and electrical stability for temperature measurement applications. In this study, the electrical and microstructural properties of Ni0.5Co0.5Cu0.3Zn0.3Mn1.4O4 NTC thermistor were investigated. The samples were fabricated by the conventional solid-state reaction method. The powders were calcinated at 900 °C for 2 h and the samples were sintered at 1200 and 1300 °C for 5 h in air. The bulk density of samples was 5.07 and 4.96 g/cm3, respectively. The microstructure of samples was observed using a scanning electron microscope. The electrical resistance was measured in a temperature programmable furnace between 25 and 85 °C. The electrical resistivity of the Ni0.5Co0.5Cu0.3Zn0.3Mn1.4O4 sample increased from 52 Ω cm to 95 Ω cm when the sintering temperature increased from 1200 to 1300 °C. The material constant “B”, sensitivity coefficient “α” and activation energy “Ea” values were also calculated for the NTC thermistors .
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References
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Acknowledgements
This study is supported by TÜBİTAK (The Scientific and Technical Research Council of Turkey), Project number 3001-114M860. We would like to thank TÜBİTAK for its financial support.
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© 2017 The Minerals, Metals & Materials Society
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Hardal, G., Yüksel Price, B. (2017). Electrical and Microstructural Investigation of Ni0.5Co0.5Cu0.3Zn0.3Mn1.4O4 Temperature Sensors. In: Ikhmayies, S., et al. Characterization of Minerals, Metals, and Materials 2017. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51382-9_16
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DOI: https://doi.org/10.1007/978-3-319-51382-9_16
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