Effects of Uniaxial Compaction Pressure on the Dielectric Properties of B a T i O3/Polyvinylidene Fluoride Composites

Hsing-I Hsiang, Fu Su Yen Yen

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10 Citations (Scopus)

Abstract

In this study, the formation of internal stress, domain switching, phase transition, and dielectric property variations of BaTiO3 particles in the BaTiO3-PVDF composites are investigated. It is found that the characteristics of the composite are highly affected by the magnitude of the compaction pressure employed. The internal stress may change from a state of compressive to tensile as the pressure increases. This is characterized by domain switching, in which the c axis rotates 90°, leaning from perpendicular to the sample surface to parallel. Meanwhile, a larger compaction pressure favors the formation of orthorhombic (o-) BaTiO3, which can result from the effects of internal stress and crystallite size. Composites made of BaTiO3 crystallites with higher internal stress and o-BaTiO3 contents may have higher values of the dielectric constant.

Original languageEnglish
Number of pages1
JournalJapanese Journal of Applied Physics
Volume33
Issue number7R
DOIs
Publication statusPublished - 1994 Jan 1

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vinylidene
Dielectric properties
residual stress
fluorides
dielectric properties
Residual stresses
Compaction
composite materials
Composite materials
Crystallite size
Crystallites
crystallites
Permittivity
Phase transitions
permittivity

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "In this study, the formation of internal stress, domain switching, phase transition, and dielectric property variations of BaTiO3 particles in the BaTiO3-PVDF composites are investigated. It is found that the characteristics of the composite are highly affected by the magnitude of the compaction pressure employed. The internal stress may change from a state of compressive to tensile as the pressure increases. This is characterized by domain switching, in which the c axis rotates 90°, leaning from perpendicular to the sample surface to parallel. Meanwhile, a larger compaction pressure favors the formation of orthorhombic (o-) BaTiO3, which can result from the effects of internal stress and crystallite size. Composites made of BaTiO3 crystallites with higher internal stress and o-BaTiO3 contents may have higher values of the dielectric constant.",
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AB - In this study, the formation of internal stress, domain switching, phase transition, and dielectric property variations of BaTiO3 particles in the BaTiO3-PVDF composites are investigated. It is found that the characteristics of the composite are highly affected by the magnitude of the compaction pressure employed. The internal stress may change from a state of compressive to tensile as the pressure increases. This is characterized by domain switching, in which the c axis rotates 90°, leaning from perpendicular to the sample surface to parallel. Meanwhile, a larger compaction pressure favors the formation of orthorhombic (o-) BaTiO3, which can result from the effects of internal stress and crystallite size. Composites made of BaTiO3 crystallites with higher internal stress and o-BaTiO3 contents may have higher values of the dielectric constant.

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