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Influence of sintering conditions on Ni internal electrode and PTCR effect of the multilayer (Ba1.005−x Y x )TiO3 ceramics

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Abstract

The influence of sintering conditions on the positive temperature coefficient of resistance (PTCR) characteristics and the Ni internal electrode in multilayer (Ba1.005−x Y x )TiO3 (BYT) ceramics is investigated. The BYT ceramics were fired at 1160–1240 °C for 2 h in a reducing atmosphere and then reoxidised at 500–900 °C for 1–2 h. Results indicate that the room-temperature (RT) resistance for BYT ceramics—which were reoxidised at 750 °C for 2 h after sintering at different temperatures—decreased quickly when the sintering temperature was increased from 1160 to 1240 °C. As the firing temperature increased, the sample resistance jump [Lg(R max/R min)] increased initially and then decreased. In addition, the reoxidation temperature effect on the electrical properties and the PTCR effect on the specimens were also studied. Finally, the BYT ceramics showed a significant PTCR characteristic. They obtained a resistance jump greater than 3.06 orders of magnitude and a low RT resistance of 0.25 Ω at a 750 °C reoxidated temperature for 2 h after sintering at 1180 °C for 2 h in a reducing atmosphere. In addition, the sintering temperature influence on the Ni internal electrode surface microstructure is investigated using FSEM.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51402258), the Natural Science Foundation of Guangdong Province (No. 2015A030313706), the Science and Technology Planning Project of Guangdong Province (No. 2014A010105056), the Characteristic Creative Project in University of Guangdong Province (No. 2014KTSCX189), the Science and Technology Planning Project of Zhaoqing City (No. 2015B010402003).

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  1. College of Electronic Information and Electromechanical Engineering, Zhaoqing University, Zhaoqing Road, Duanzhou District, Zhaoqing, 526061, Guangdong, People’s Republic of China

    Xuxin Cheng, Xiaoxia Li & Haining Cui

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  1. Xuxin Cheng
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  2. Xiaoxia Li
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  3. Haining Cui
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Correspondence to Xuxin Cheng.

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Cheng, X., Li, X. & Cui, H. Influence of sintering conditions on Ni internal electrode and PTCR effect of the multilayer (Ba1.005−x Y x )TiO3 ceramics. J Mater Sci: Mater Electron 28, 5200–5206 (2017). https://doi.org/10.1007/s10854-016-6176-8

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