Phase transition and dielectric properties of nanograin BaTi O3 ceramic under high pressure

Jinlong Zhu, Changqing Jin, Wenwu Cao, Xiaohui Wang

Research output: Contribution to journalArticle

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Abstract

Temperature dependence of the dielectric constant of nanograin BaTiO 3 ceramic has been investigated under hydrostatic pressure σ up to 5 GPa. We found that the paraelectric-ferroelectric phase transition temperature TC decreases with σ at a rate of dTC/dσ=-40.0 (±1.1) KGPa for coarse-grain ceramic and -34.3 (±1.4) KGPa for ceramic with 60 nm grains. The variation of intergranular stresses with reducing grain size is considered as the main factor causing the decrease of TC and the change of d TC dσ.

Original languageEnglish (US)
Article number242901
JournalApplied Physics Letters
Volume92
Issue number24
DOIs
StatePublished - Jun 30 2008

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dielectric properties
ceramics
hydrostatic pressure
grain size
transition temperature
permittivity
temperature dependence

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "Temperature dependence of the dielectric constant of nanograin BaTiO 3 ceramic has been investigated under hydrostatic pressure σ up to 5 GPa. We found that the paraelectric-ferroelectric phase transition temperature TC decreases with σ at a rate of dTC/dσ=-40.0 (±1.1) KGPa for coarse-grain ceramic and -34.3 (±1.4) KGPa for ceramic with 60 nm grains. The variation of intergranular stresses with reducing grain size is considered as the main factor causing the decrease of TC and the change of d TC dσ.",
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Phase transition and dielectric properties of nanograin BaTi O3 ceramic under high pressure. / Zhu, Jinlong; Jin, Changqing; Cao, Wenwu; Wang, Xiaohui.

In: Applied Physics Letters, Vol. 92, No. 24, 242901, 30.06.2008.

Research output: Contribution to journalArticle

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AB - Temperature dependence of the dielectric constant of nanograin BaTiO 3 ceramic has been investigated under hydrostatic pressure σ up to 5 GPa. We found that the paraelectric-ferroelectric phase transition temperature TC decreases with σ at a rate of dTC/dσ=-40.0 (±1.1) KGPa for coarse-grain ceramic and -34.3 (±1.4) KGPa for ceramic with 60 nm grains. The variation of intergranular stresses with reducing grain size is considered as the main factor causing the decrease of TC and the change of d TC dσ.

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