Temperature and stress dependence of Young's modulus in semiconducting barium titanate ceramics

Gerhard Mader, Hans Meixner, Peter Kleinschmidt

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In order to study the temperature and stress dependence of Young's modulus in semiconducting barium titanate ceramics, the longitudinal sound velocity was measured at a frequency of 5 MHz in the temperature range of 20-180°C. It is striking that at temperatures above the Curie point (Tc=120°C) the sound velocity reaches values that are 10-20% higher than those at room temperature. Furthermore, a shift of the Curie point of about 2×10 -8 K/Pa is observed if uniaxial stress is applied perpendicular to the sound propagation. Both effects can be understood by means of the phenomenological theory of Devonshire.

Original languageEnglish
Pages (from-to)702-704
Number of pages3
JournalJournal of Applied Physics
Volume58
Issue number2
DOIs
Publication statusPublished - Dec 1 1985

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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