The ferroelectric phase transition of rare earth oxide substituted lead titanate ceramics

K. Keizer, A.J. Burggraaf

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

In rare earth oxide (L2 O3) substituted lead titanate Pb1-axLxTiO3+x(1.5-α) within the homogeneity range of the perovskite phase two compositional parameters affect the ferroelectric phase transition (FPT). The parameters are the LO1.5-TiO2 ratio (x) and the PbO-TiO2 ratio (1-αx).An increase of the value of x causes the Curie temperature to decrease and this shift is smaller with a decreasing radius of the rare earth ion. An increase of (1-αx) at a constant value of x increases the Curie temperature to higher values especially if the radius of the rare earth ion is small. At values of x < 0.23 the FPT is not broadened and has a Curie-Weiss behaviour in monophasic, homogeneous, coarse grained materials. For La2O3 substituted PbTiO3 (PLT) with x = 0.30 the FPT is broadened and frequency dependent. A quadratic relation between the reciprocal dielectric constant and the temperature is found.
Original languageEnglish
Pages (from-to)671-673
Number of pages3
JournalFerroelectrics
Volume14
Issue number1
DOIs
Publication statusPublished - 1976

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Lead oxide
lead oxides
Oxides
Rare earths
Ferroelectric materials
rare earth elements
Phase transitions
ceramics
Curie temperature
Ions
radii
Perovskite
homogeneity
ions
Permittivity
Lead
permittivity
oxides
causes
shift

Cite this

Keizer, K. ; Burggraaf, A.J. / The ferroelectric phase transition of rare earth oxide substituted lead titanate ceramics. In: Ferroelectrics. 1976 ; Vol. 14, No. 1. pp. 671-673.
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The ferroelectric phase transition of rare earth oxide substituted lead titanate ceramics. / Keizer, K.; Burggraaf, A.J.

In: Ferroelectrics, Vol. 14, No. 1, 1976, p. 671-673.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - The ferroelectric phase transition of rare earth oxide substituted lead titanate ceramics

AU - Keizer, K.

AU - Burggraaf, A.J.

PY - 1976

Y1 - 1976

N2 - In rare earth oxide (L2 O3) substituted lead titanate Pb1-axLxTiO3+x(1.5-α) within the homogeneity range of the perovskite phase two compositional parameters affect the ferroelectric phase transition (FPT). The parameters are the LO1.5-TiO2 ratio (x) and the PbO-TiO2 ratio (1-αx).An increase of the value of x causes the Curie temperature to decrease and this shift is smaller with a decreasing radius of the rare earth ion. An increase of (1-αx) at a constant value of x increases the Curie temperature to higher values especially if the radius of the rare earth ion is small. At values of x < 0.23 the FPT is not broadened and has a Curie-Weiss behaviour in monophasic, homogeneous, coarse grained materials. For La2O3 substituted PbTiO3 (PLT) with x = 0.30 the FPT is broadened and frequency dependent. A quadratic relation between the reciprocal dielectric constant and the temperature is found.

AB - In rare earth oxide (L2 O3) substituted lead titanate Pb1-axLxTiO3+x(1.5-α) within the homogeneity range of the perovskite phase two compositional parameters affect the ferroelectric phase transition (FPT). The parameters are the LO1.5-TiO2 ratio (x) and the PbO-TiO2 ratio (1-αx).An increase of the value of x causes the Curie temperature to decrease and this shift is smaller with a decreasing radius of the rare earth ion. An increase of (1-αx) at a constant value of x increases the Curie temperature to higher values especially if the radius of the rare earth ion is small. At values of x < 0.23 the FPT is not broadened and has a Curie-Weiss behaviour in monophasic, homogeneous, coarse grained materials. For La2O3 substituted PbTiO3 (PLT) with x = 0.30 the FPT is broadened and frequency dependent. A quadratic relation between the reciprocal dielectric constant and the temperature is found.

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