Phase transitions of the ferroelectric Na0.5Bi0.5TiO3 by dielectric and internal friction measurements

Venkata Ramana Mudinepalli, N. Ramamanohar Reddy, Wen-Chin Lin, K. V. Siva Kumar, B. S. Murty

研究成果: 雜誌貢獻文章

6 引文 斯高帕斯(Scopus)

摘要

This work focuses on the high temperature dielectric and mechanical spectroscopic properties of lead free relaxor Sodium Bismuth Titanate (NBT) ceramics, fabricated by conventional ceramic double sintering method. Systematic measurements of dielectric and mechanical properties have been performed as a function of temperature. A sequence of phase transitions has been studied by both dielectric and anelastic measurements. Three internal friction peaks were observed near 350, 200 and 120 °C. The 350 °C-peak corresponds to a transition associated with the tetragonal (P4bm) to rhombohedral (R3c) phase, and the 200 °C-peak is related to the ferroelectric to antiferroelectric phase transition. The 120 °C-peak could be ascribed to the interaction between the domain walls and the diffusion of oxygen vacancies in the domains.

原文英語
頁(從 - 到)27-32
頁數6
期刊Advanced Materials Letters
6
發行號1
DOIs
出版狀態已發佈 - 2015 一月 1

ASJC Scopus subject areas

  • Materials Science(all)

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