Effect of Reoxidation Temperature on Electrophysical Properties of High-TC Barium Titanate-Based PTCR Ceramics

Tatiana Plutenko; Oleg I. V'yunov

doi:10.4028/www.scientific.net/SSP.200.311

Paper Titles

Effect of Direct Transport Current and Heat Treatment on Resistive Properties of Bismuth-Based Ceramic High-Temperature Superconducting Oxides of Various Compositions
p.267

Plasma Frequency in Josephson Junctions with a Non-Sinusoidal Current-Phase Relation
p.272

Lithium Ion Conductors Based on System (Li,Na,La){Ti,Nb,Та}O with Perovskite Structure
p.279

Oxygen Ionic Transport in Brownmillerite-Type Ca₂Fe₂O_5-δ and Calcium Ferrite-Based Composite Membranes
p.286

Fractal Analysis of Surface Topography of Solid Oxide Fuel Cell Materials
p.293

Solid-State Catalysts Based on Bentonites and Pd(II) Cu(II) Complexes for Low-Temperature Carbon Monoxide Oxidation
p.299

Structure and Gas Sensitivity of the ZnO Sensor of Ethanol
p.305

Effect of Reoxidation Temperature on Electrophysical Properties of High-T_C Barium Titanate-Based PTCR Ceramics
p.311

Are the Temperature Sensors Based on Chalcogenide Glass Possible?
p.316

HomeSolid State PhenomenaSolid State Phenomena Vol. 200Effect of Reoxidation Temperature on...

Effect of Reoxidation Temperature on Electrophysical Properties of High-T_C Barium Titanate-Based PTCR Ceramics

Abstract:

Ceramic samples of (1 x)BaTiO_3–xNa_0.5Bi_0.5TiO₃ system were prepared by sintering in reducing atmosphere of N₂/H₂ and were subsequently reoxidized in air. The influence of reoxidation temperature firing on the PTCR effect of (1 x)BaTiO_3–xNa_0.5Bi_0.5TiO₃ ceramics was investigated. The effect of Na_0.5Bi_0.5TiO₃ concentration on resistivity and microstructure of the reoxidized samples was investigated by means of complex impedance spectroscopy and scanning electron microscopy. It has been found that the grain size decreases with the increase in Na_0.5Bi_0.5TiO₃ content. The values of minimum ρmin and maximum ρmax resistivities of the samples were observed to increase with the increase in reoxidation temperature in the 600 – 1000°C temperature range. It was shown that with increasing in reoxidation temperature of (1-x)BaTiO_3-xNa_0.5Bi_0.5TiO₃ solid solutions, potential barrier at grain boundaries increases.

You might also be interested in these eBooks

Oxide Materials for Electronic Engineering - Fabrication, Properties and Applications

View Preview

Info:

Periodical:

Solid State Phenomena (Volume 200)

Pages:

311-315

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.200.311

Citation:

Cite this paper

Online since:

April 2013

Authors:

Tatiana Plutenko, Oleg I. V'yunov

Keywords:

Barium Titanate (BT), Ceramic, PTCR, Reoxidation, Resistivity

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] K. Okazaki, Ceramic Engineering for Dielectrics, Gakken-Sha Publishing Co., Tokyo, (1983).

Google Scholar

[2] Directive 2002/95/Ec of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment, Official J. of the European Union. L37 (2003) 19-23.

Google Scholar

[3] B.H. Kim et al., Electrical properties of (1-x)(Bi0. 5Na0. 5)TiO3-xBaTiO3 synthesized by emulsion method, Ceram. Int. 33 (2007) 447-452.

Google Scholar

[4] W. Heywang, Resistivity Anomaly in Doped Barium Titanate, J. Am. Ceram. Soc. 47 (1964) 484-490.

DOI: 10.1111/j.1151-2916.1964.tb13795.x

Google Scholar

[5] C. Zhou, X. Liu, W. Li, C. Yuan, Structure and piezoelectric properties of Bi0. 5Na0. 5TiO3- Bi0. 5K0. 5TiO3-BiFeO3 lead-free piezoelectric ceramics, Mater. Chem. Phys. 114 (2009) 832836.

DOI: 10.1007/s12034-007-0090-x

Google Scholar

[6] M. Kuwabara, Effect of Microstructure on the PTCR Effect in Semiconducting Barium Titanate Ceramics, J. Am. Ceram. Soc. 64 (1981) 639-644.

DOI: 10.1111/j.1151-2916.1981.tb15861.x

Google Scholar

[7] D.Y. Wang, K. Umeya, Electrical Properties of PTCR Barium Titanate, J. Am. Cerаm. Soc. 73 (1990) 669-677.

DOI: 10.1111/j.1151-2916.1990.tb06570.x

Google Scholar

[8] W. Heywang, Semiconducting barium titanate, J. Mater. Sci. 6 (1971) 1214-1226.

Google Scholar

[9] O.I. V'yunov, L.L. Kovalenko, A.G. Belous, V.N. Belyakov, Distribution of manganese ions and its effect on the properties of PTCR ceramic, Inorg. Mater. 39 (2003) 190-197.

Google Scholar