Effects of microstructure on the dielectric properties of lanthana substituted PbTiO3 and Pb (Zr, Ti) O3-ceramics

A.J. Burggraaf, K. Keizer

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Abstract

The effect of grain size on unit-cell dimensions and dielectric properties has been studied in ceramic lanthana-substituted leadtitanate and leadtitanate-zirconate mixed crystals of the general composition Pb1−αxLaxZryTi1−yO3+x(1.5−α). The influence of grain size has been investigated in the range from 0.6μm–10μm and can be distinguished from other microstructural influences by its effect on dielectric properties. A decrease of the grain size leads to a decrease of the maximum of the dielectric constant ε′ at the “Curie” temperature Tc′, while the value of Tc′ shifts to a lower temperature and the ε′-T curve (phase transition) becomes broadened. The results can be discussed in terms of a distribution of internal compression stresses spreading around an average value which increases with decreasing grain size.
Original languageEnglish
Pages (from-to)521-528
JournalMaterials research bulletin
Volume10
Issue number6
DOIs
Publication statusPublished - 1975

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Lanthanum
lanthanum
Dielectric properties
dielectric properties
grain size
ceramics
microstructure
Microstructure
Curie temperature
Permittivity
Phase transitions
Crystals
mixed crystals
Chemical analysis
permittivity
Temperature
shift
curves
cells

Cite this

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title = "Effects of microstructure on the dielectric properties of lanthana substituted PbTiO3 and Pb (Zr, Ti) O3-ceramics",
abstract = "The effect of grain size on unit-cell dimensions and dielectric properties has been studied in ceramic lanthana-substituted leadtitanate and leadtitanate-zirconate mixed crystals of the general composition Pb1−αxLaxZryTi1−yO3+x(1.5−α). The influence of grain size has been investigated in the range from 0.6μm–10μm and can be distinguished from other microstructural influences by its effect on dielectric properties. A decrease of the grain size leads to a decrease of the maximum of the dielectric constant ε′ at the “Curie” temperature Tc′, while the value of Tc′ shifts to a lower temperature and the ε′-T curve (phase transition) becomes broadened. The results can be discussed in terms of a distribution of internal compression stresses spreading around an average value which increases with decreasing grain size.",
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Effects of microstructure on the dielectric properties of lanthana substituted PbTiO3 and Pb (Zr, Ti) O3-ceramics. / Burggraaf, A.J.; Keizer, K.

In: Materials research bulletin, Vol. 10, No. 6, 1975, p. 521-528.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Effects of microstructure on the dielectric properties of lanthana substituted PbTiO3 and Pb (Zr, Ti) O3-ceramics

AU - Burggraaf, A.J.

AU - Keizer, K.

PY - 1975

Y1 - 1975

N2 - The effect of grain size on unit-cell dimensions and dielectric properties has been studied in ceramic lanthana-substituted leadtitanate and leadtitanate-zirconate mixed crystals of the general composition Pb1−αxLaxZryTi1−yO3+x(1.5−α). The influence of grain size has been investigated in the range from 0.6μm–10μm and can be distinguished from other microstructural influences by its effect on dielectric properties. A decrease of the grain size leads to a decrease of the maximum of the dielectric constant ε′ at the “Curie” temperature Tc′, while the value of Tc′ shifts to a lower temperature and the ε′-T curve (phase transition) becomes broadened. The results can be discussed in terms of a distribution of internal compression stresses spreading around an average value which increases with decreasing grain size.

AB - The effect of grain size on unit-cell dimensions and dielectric properties has been studied in ceramic lanthana-substituted leadtitanate and leadtitanate-zirconate mixed crystals of the general composition Pb1−αxLaxZryTi1−yO3+x(1.5−α). The influence of grain size has been investigated in the range from 0.6μm–10μm and can be distinguished from other microstructural influences by its effect on dielectric properties. A decrease of the grain size leads to a decrease of the maximum of the dielectric constant ε′ at the “Curie” temperature Tc′, while the value of Tc′ shifts to a lower temperature and the ε′-T curve (phase transition) becomes broadened. The results can be discussed in terms of a distribution of internal compression stresses spreading around an average value which increases with decreasing grain size.

U2 - 10.1016/0025-5408(75)90177-4

DO - 10.1016/0025-5408(75)90177-4

M3 - Article

VL - 10

SP - 521

EP - 528

JO - Materials research bulletin

JF - Materials research bulletin

SN - 0025-5408

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