Phase relations and dielectric behaviour of (Pb, La)Zr0.55Ti0.45O3 ceramics with a diffuse phase transition region

M. Wolters, A.J. Burggraaf

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Abstract

Phase relations in (Pb, La)Zr0.55Ti0.45O3 ceramics have been investigated by means of X‐ray diffraction and dielectric measurements as functions of the La concentration and temperature. Between a tetragonal, ferroelectric phase (FE) and a cubic, paraelectric phase (PE), in the phase diagram a pseudo‐cubic phase, a so‐called quasi‐ferroelectric phase (QFE) was found. The phase boundary FE-QFE found from dielectric and X‐ray data approximately coincides, while the unit cell volume and unit cell dimensions show discontinuities at this boundary. The dielectric properties were investigated in the QFE and PE phase fields as functions of temperature and frequency. The dielectric constant ϵ as a function of temperature could be represented in both the phase fields by a quadratic law of the type ϵ−1 = ϵmax−1 + C(T-T'c)2, while T'c as well as tan δmax were dependent on the frequency.
Original languageEnglish
Pages (from-to)341-350
JournalPhysica Status Solidi A: Applied research
Volume24
Issue number1
DOIs
Publication statusPublished - 1974

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Phase transitions
ceramics
Ferroelectric materials
Phase boundaries
cells
Dielectric properties
Temperature
Phase diagrams
temperature
dielectric properties
discontinuity
Permittivity
Diffraction
phase diagrams
permittivity
diffraction

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title = "Phase relations and dielectric behaviour of (Pb, La)Zr0.55Ti0.45O3 ceramics with a diffuse phase transition region",
abstract = "Phase relations in (Pb, La)Zr0.55Ti0.45O3 ceramics have been investigated by means of X‐ray diffraction and dielectric measurements as functions of the La concentration and temperature. Between a tetragonal, ferroelectric phase (FE) and a cubic, paraelectric phase (PE), in the phase diagram a pseudo‐cubic phase, a so‐called quasi‐ferroelectric phase (QFE) was found. The phase boundary FE-QFE found from dielectric and X‐ray data approximately coincides, while the unit cell volume and unit cell dimensions show discontinuities at this boundary. The dielectric properties were investigated in the QFE and PE phase fields as functions of temperature and frequency. The dielectric constant ϵ as a function of temperature could be represented in both the phase fields by a quadratic law of the type ϵ−1 = ϵmax−1 + C(T-T'c)2, while T'c as well as tan δmax were dependent on the frequency.",
author = "M. Wolters and A.J. Burggraaf",
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language = "English",
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Phase relations and dielectric behaviour of (Pb, La)Zr0.55Ti0.45O3 ceramics with a diffuse phase transition region. / Wolters, M.; Burggraaf, A.J.

In: Physica Status Solidi A: Applied research, Vol. 24, No. 1, 1974, p. 341-350.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Phase relations and dielectric behaviour of (Pb, La)Zr0.55Ti0.45O3 ceramics with a diffuse phase transition region

AU - Wolters, M.

AU - Burggraaf, A.J.

PY - 1974

Y1 - 1974

N2 - Phase relations in (Pb, La)Zr0.55Ti0.45O3 ceramics have been investigated by means of X‐ray diffraction and dielectric measurements as functions of the La concentration and temperature. Between a tetragonal, ferroelectric phase (FE) and a cubic, paraelectric phase (PE), in the phase diagram a pseudo‐cubic phase, a so‐called quasi‐ferroelectric phase (QFE) was found. The phase boundary FE-QFE found from dielectric and X‐ray data approximately coincides, while the unit cell volume and unit cell dimensions show discontinuities at this boundary. The dielectric properties were investigated in the QFE and PE phase fields as functions of temperature and frequency. The dielectric constant ϵ as a function of temperature could be represented in both the phase fields by a quadratic law of the type ϵ−1 = ϵmax−1 + C(T-T'c)2, while T'c as well as tan δmax were dependent on the frequency.

AB - Phase relations in (Pb, La)Zr0.55Ti0.45O3 ceramics have been investigated by means of X‐ray diffraction and dielectric measurements as functions of the La concentration and temperature. Between a tetragonal, ferroelectric phase (FE) and a cubic, paraelectric phase (PE), in the phase diagram a pseudo‐cubic phase, a so‐called quasi‐ferroelectric phase (QFE) was found. The phase boundary FE-QFE found from dielectric and X‐ray data approximately coincides, while the unit cell volume and unit cell dimensions show discontinuities at this boundary. The dielectric properties were investigated in the QFE and PE phase fields as functions of temperature and frequency. The dielectric constant ϵ as a function of temperature could be represented in both the phase fields by a quadratic law of the type ϵ−1 = ϵmax−1 + C(T-T'c)2, while T'c as well as tan δmax were dependent on the frequency.

U2 - 10.1002/pssa.2210240131

DO - 10.1002/pssa.2210240131

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SN - 1862-6300

IS - 1

ER -