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Investigation of PTCR effect and microdefects in Nb₂O₅-doped BaTiO₃-based ceramics by positron annihilation techniques

College of Electronic Information and Mechatronic Engineering, Zhaoqing University, Zhaoqing Road Duanzhou District, Zhaoqing 526061, Guangdong, P. R. China

E-mail Address: cxx101@126.com

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Haining Cui

College of Electronic Information and Mechatronic Engineering, Zhaoqing University, Zhaoqing Road Duanzhou District, Zhaoqing 526061, Guangdong, P. R. China

E-mail Address: cuihaining2009@126.com

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Xiaoxia Li

College of Electronic Information and Mechatronic Engineering, Zhaoqing University, Zhaoqing Road Duanzhou District, Zhaoqing 526061, Guangdong, P. R. China

E-mail Address: lxxshrimp@yahoo.com.cn

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, and

Wen Deng

School of Physical Science and Technology, Guangxi University, Daxue Road 100, Nanning 530004, Guangxi, P. R. China

E-mail Address: wdeng@gxu.edu.cn

Corresponding author.

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https://doi.org/10.1142/S021797921744060XCited by:1 (Source: Crossref)

Abstract

The influence of Nb₂O₅-doped concentration on the positive temperature coefficient of resistance (PTCR) effect, electrical properties and microdefects of (Ba $_{0.95}$ $_{0.95}$ Sr $_{0.05}$ $_{0.05}$ )(TiNb $_{x}$ $_{x}$ )O₃ (BSTN) ceramics were investigated. Firing was conducted at 1350 $^{\circ}$ $^{\circ}$ C for 2 h in air. The donor-doped content affected the electrical properties, PTCR effect and formation of the microdefect type of the BSTN samples. The room temperature resistivity of the BSTN specimens first decreased and then increased with increasing donor-doped content in the range of 0.2 mol.% Nb $^{5 +}$ $^{5 +}$ to 0.5 mol.% Nb $^{5 +}$ $^{5 +}$ . Moreover, the information on microdefects in BSTN ceramics was demonstrated by coincidence Doppler broadening spectrum. The influence of the defects on the PTCR characteristics of the ceramics was also revealed.

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References

1. M. W. Mancini and P. I. P. Filho, J. Appl. Phys. 100, 104501 (2006). Crossref, Web of Science, ADS, Google Scholar
2. W. Heywang, J. Am. Ceram. Soc. 47, 484 (1964). Crossref, Web of Science, Google Scholar
3. J. Illingsworth et al., J. Appl. Phys. 67, 2088 (1990). Crossref, Web of Science, ADS, Google Scholar
4. W. Heywang, Solid-State Electron. 3, 51 (1961). Crossref, Web of Science, ADS, Google Scholar
5. G. H. Jonker, Solid-State Electron. 7, 895 (1964). Crossref, Web of Science, ADS, Google Scholar
6. T. Kolodiazhnyi and A. Petric, J. Am. Ceram. Soc. 86, 1554 (2003). Crossref, Web of Science, Google Scholar
7. H. T. Langhammer et al., J. Eur. Ceram. Soc. 26, 2907 (2006). Crossref, Web of Science, Google Scholar
8. D. Makovec, N. Ule and M. Drofenik, J. Am. Ceram. Soc. 84, 1273 (2001). Crossref, Web of Science, Google Scholar
9. G. H. Jonker and E. E. Havinga, Mater. Res. Bull. 17, 345 (1982). Crossref, Web of Science, Google Scholar
10. H. M. Chan, M. P. Harmer and D. M. Smyth, J. Am. Ceram. Soc. 69, 507 (1986). Crossref, Web of Science, Google Scholar
11. E. Brzozowski and M. S. Castro, J. Mater. Process. Technol. 168, 464 (2005). Crossref, Web of Science, Google Scholar
12. W. Deng et al., Mater. Lett. 59, 3390 (2005). Google Scholar
13. Y. Tang et al., J. Am. Ceram. Soc. 96, 2537 (2013). Crossref, Web of Science, Google Scholar
14. H. M. Chan, M. P. Harmer and D. M. Smyth, J. Am. Ceram. Soc. 69, 507 (1986). Crossref, Web of Science, Google Scholar
15. Y. P. Pu et al., J. Mater. Sci.-Mater. Electron. 22, 1480 (2011). Crossref, Web of Science, Google Scholar
16. E. Brzozowski and M. S. Castro, J. Eur. Ceram. Soc. 24, 2499 (2004). Crossref, Web of Science, Google Scholar
17. E. Brzozowski et al., Ceram. Int. 28, 773 (2002). Crossref, Web of Science, Google Scholar
18. J. Nowotny and M. Rekas, Ceram. Int. 20, 265 (1994). Crossref, Web of Science, Google Scholar
19. V. J. Ghosh et al., Phys. Rev. B 61, 10092 (2000). Crossref, Web of Science, ADS, Google Scholar