Study of phase transitions and properties of tetragonal (Pb,La)(Zr,Ti)O3 ceramics-I: Phase diagram and β-phase

C.G.F. Stenger, A.J. Burggraaf

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Abstract

The phase diagram (T-x plot) of thermally depoled tetragonal PLZT materials has been investigated by means of X-ray diffraction, Capacitance and DSC measurements. Materials with a low La content show a classical Fet↔PEc transition. This transition has first or second order character, dependent on the Zr/Ti ratio. Materials with a medium and high La content show a diffuse transition from the cubic high temperature phase to a tetragonal, so called β phase. This β phase has no clear FE properties and a spontaneous transition to the FEt phase on lowering the temperature only takes place for materials with a medium La content. For materials with a high La content a spontaneous βt→ FEt transition is not observed.

Original languageEnglish
Pages (from-to)17-23
Number of pages7
JournalJournal of physics and chemistry of solids
Volume41
Issue number1
DOIs
Publication statusPublished - 1980

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Phase diagrams
Phase transitions
phase diagrams
ceramics
Capacitance
plots
capacitance
X ray diffraction
Temperature
diffraction
x rays
temperature

Keywords

  • Ceramics

Cite this

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Study of phase transitions and properties of tetragonal (Pb,La)(Zr,Ti)O3 ceramics-I : Phase diagram and β-phase. / Stenger, C.G.F.; Burggraaf, A.J.

In: Journal of physics and chemistry of solids, Vol. 41, No. 1, 1980, p. 17-23.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Study of phase transitions and properties of tetragonal (Pb,La)(Zr,Ti)O3 ceramics-I

T2 - Phase diagram and β-phase

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AU - Burggraaf, A.J.

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AB - The phase diagram (T-x plot) of thermally depoled tetragonal PLZT materials has been investigated by means of X-ray diffraction, Capacitance and DSC measurements. Materials with a low La content show a classical Fet↔PEc transition. This transition has first or second order character, dependent on the Zr/Ti ratio. Materials with a medium and high La content show a diffuse transition from the cubic high temperature phase to a tetragonal, so called β phase. This β phase has no clear FE properties and a spontaneous transition to the FEt phase on lowering the temperature only takes place for materials with a medium La content. For materials with a high La content a spontaneous βt→ FEt transition is not observed.

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