Please use this identifier to cite or link to this item: http://cmuir.cmu.ac.th/jspui/handle/6653943832/62873
Title: Influence of A-site deficiency on electrical characteristics of barium strontium titanate perovskite dielectrics
Authors: Natthaphon Raengthon
Gobwute Rujijanagul
David P. Cann
Keywords: Physics and Astronomy
Issue Date: 21-Oct-2018
Abstract: © 2018 Author(s). Improvement of dielectric properties and insulation resistance are important for the development of high-performance dielectric materials. Various techniques can be used in order to improve the performance of such materials. The effect of A-cation deficiency on the electrical properties of barium strontium titanate ceramics is an interesting topic of investigation. Thus, this study examined the stoichiometric, 0.01 mol Ba-deficient, and 0.01 mol Sr-deficient compositions of (Ba0.8Sr0.2)TiO3 ceramics. Changes in the dielectric characteristics were observed in the 0.01 mol Ba-deficient and 0.01 mol Sr-deficient compositions. The characteristics of electrical conduction revealed by impedance analysis are different at high temperatures when Ba-deficiency and Sr-deficiency are introduced to the dielectrics. The Ti4+ state for the Ba-deficient composition is maintained. However, the Ti4+ state partially changes to the Ti3+ state, giving rise to the polaron hopping conduction process for Sr-deficient composition. Therefore, this study shows that a minor deviation of the A-cation from stoichiometry can induce a different conduction process while maintaining the dielectric permittivity characteristics.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85055207011&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/62873
ISSN: 10897550
00218979
Appears in Collections:CMUL: Journal Articles

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