Ceramics and CompositesNo Access

Investigation of PTCR characteristics in ${Nb}_{2} O_{5}$ ${Nb}_{2} O_{5}$ -doped ${BaTiO}_{3}$ ${BaTiO}_{3}$ -based chip-type ceramics prepared by reduction sintering-reoxidation method

Xuxin Cheng

School of Electronic and Electrical Engineering, Zhaoqing University, Zhaoqing 526061, P. R. China

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Xiaoming Chen

School of Electronic and Electrical Engineering, Zhaoqing University, Zhaoqing 526061, P. R. China

E-mail Address: zqcxm@qq.com

Corresponding author.

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Haining Cui

School of Electronic and Electrical Engineering, Zhaoqing University, Zhaoqing 526061, P. R. China

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Yuxin Wang

School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China

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, and

Chao Xiong

School of Photoelectric Engineering, Changzhou Institute of Technology, Changzhou 213001, P. R. China

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https://doi.org/10.1142/S0217979220400470Cited by:0 (Source: Crossref)

This article is part of the issue:

SPECIAL ISSUE — MMPD 2019

Abstract

This study investigates the influence of sintering conditions on electrical properties and positive temperature coefficient of resistance (PTCR) of ${Ba}_{1.005} ({Ti}_{1 - x} {Nb}_{x}) O_{3}$ ${Ba}_{1.005} ({Ti}_{1 - x} {Nb}_{x}) O_{3}$ (BTNO) ceramics, fired at $119 0^{\circ}$ $119 0^{\circ}$ C for different times from 1 to 6 h in a reducing atmosphere and reoxidised within the temperature range of $600$ $600$ – $90 0^{\circ}$ $90 0^{\circ}$ C for 1 h. The results showed that the room-temperature (RT) resistance and the resistance jump of the multilayer BTNO ceramics decreased with an increase in the firing time. Furthermore, the RT resistance of the BTNO samples gradually increased at first and then rapidly increased with increasing reoxidation temperature. In addition, the influence of sintering times on the microstructure of ceramics was also investigated.

Keywords:

PACS: 84.32.Ff

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