The Influence of Donor-Doped Content on PTCR Effect of (Ba1-xSmx)TiO3 Based Ceramics Prepared by the Reduction Sintering-Reoxidation Method

Xu Xin Cheng; Zhao Xiong Zhao; Dong Xiang Zhou; Qiu Yun Fu

doi:10.4028/www.scientific.net/AMR.1015.517

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1015The Influence of Donor-Doped Content on PTCR...

The Influence of Donor-Doped Content on PTCR Effect of (Ba_1-_xSm_x)TiO₃ Based Ceramics Prepared by the Reduction Sintering-Reoxidation Method

Abstract:

We investigated the effect of the donor-doped content on the positive temperature coefficient of resistivity (PTCR) of (Ba_1-_xSm_x)TiO₃ (BST) Based Ceramics that were sintered at 1300 °C for 30 min in a reducing atmosphere and re-oxidized at 850 °C for 1 h. The results indicated that the resistance jump first increased and then decreased with an increase of the donor-doped concentration. Moreover, the specimens achieved a low room temperature resistivity of 383.1 Ω·cm at a donor-doped content and exhibited a pronounced PTCR characteristics with a resistance jump of 3.1 orders of magnitude. Furthermore, the RT reisistivity of the samples reduced and increased with the increasing of the donor-dopant content in the range of 0.1−0.5 mol% Sm³⁺. In addition, the effect of the Sm³⁺-doped concentration on the grain size of the ceramics was investigated in our paper.

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Periodical:

Advanced Materials Research (Volume 1015)

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517-520

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https://doi.org/10.4028/www.scientific.net/AMR.1015.517

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Online since:

August 2014

Authors:

Xu Xin Cheng*, Zhao Xiong Zhao, Dong Xiang Zhou, Qiu Yun Fu

Keywords:

BaTiO₃, Ceramic, Donor-Dopant, Low Oxygen Partial Pressure, PTCR Effect

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