MECHANISM OF ELECTRICAL CONDUCTIVITY IN SEMICONDUCTING BARIUM TITANATE CERAMICS. PART 2: EXTENDED MODEL OF ELECTRICAL CONDUCTIVITY.

Gerhard Mader, Hanes Meixner, Peter Kleinschmidt

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A review of the literature and the authors' own measurements of the varistor effect were presented in Part 1. In Part 2 a number of conductivity mechanisms are discussed. An extension of the Heywang model with inclusion of the microscopic intrinsic heating effect at the grain boundaries offers a good explanation of the PTC effect and the varistor effect in BaTiO//3 ceramics. To this end, the voltage dependence of the resistance (varistor effect) is calculated for the first time by solving the system of nonlinear differential equations for the free electron diffusion with the aid of the quasi-Fermi potential.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
JournalSiemens Forschungs- und Entwicklungsberichte/Siemens Research and Development Reports
Volume16
Issue number4
Publication statusPublished - Jan 1 1987

ASJC Scopus subject areas

  • Engineering(all)

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