STUDY OF MICROSCOPIC HEAT SOURCES IN SEMICONDUCTING BARIUM TITANATE CERAMICS.

Gerhard Mader, H. Meixner, Peter Kleinschmidt

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

If high electric fields are applied to semiconducting barium titanate ceramics, the rapid temperature rise caused by power dissipation makes it difficult to separate the field dependence of the resistance from its temperature dependence. For that reason the microscopic temperature rise during a voltage pulse was calculated by a theoretical model for the heat production and the heat flow inside a single grain. In addition, the local temperature behavior was measured experimentally by means of an infrared radiometric microscope. The fast temperature rise during a voltage pulse (350 V/mm; 400 mu s) and the cooling off immediately after the end of the pulse prove that there are significant heat sources at the grain boundaries. In ceramics with relatively large grains (30-60 mu m) temperature differences up to 50 K within a single grain were measured.

Original languageEnglish
Pages (from-to)2832-2836
Number of pages5
JournalJournal of Applied Physics
Volume56
Issue number10
DOIs
Publication statusPublished - Jan 1 1984

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heat sources
barium
ceramics
pulses
temperature
electric potential
heat transmission
temperature gradients
dissipation
grain boundaries
microscopes
cooling
heat
temperature dependence
electric fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physics and Astronomy (miscellaneous)

Cite this

STUDY OF MICROSCOPIC HEAT SOURCES IN SEMICONDUCTING BARIUM TITANATE CERAMICS. / Mader, Gerhard; Meixner, H.; Kleinschmidt, Peter.

In: Journal of Applied Physics, Vol. 56, No. 10, 01.01.1984, p. 2832-2836.

Research output: Contribution to journalArticle

Mader, Gerhard ; Meixner, H. ; Kleinschmidt, Peter. / STUDY OF MICROSCOPIC HEAT SOURCES IN SEMICONDUCTING BARIUM TITANATE CERAMICS. In: Journal of Applied Physics. 1984 ; Vol. 56, No. 10. pp. 2832-2836.
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