Grain‐size effects on dielectric properties in barium titanate ceramics

ABSTRACTBarium titanate ceramics have been obtained by sol-gel methods. The dielectric investigations of these materials revealed the existence of diffuse ferroelectric transitions. By using a phenomenological model, we could demonstrate the existence of a simple relationship between the diffuse character of the transition and the sample grain-size. This effect has been attributed to interactions between charged defects on the grain surfaces and the spontaneous polarization of the material.

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Comparison of Grain Size Effects on Microstructure and Dielectric Properties of Y2/3Cu3Ti4-xFexO12(X = 0.00, 0.05 and 0.15) Ceramics Synthesized by Glycine Assisted Semi Wet Route

Processing, Properties, and Design of Advanced Ceramics and Composites: Ceramic Transactions ◽

10.1002/9781119323303.ch10 ◽

2016 ◽

pp. 117-130

Author(s):

S. Sharma ◽

M.M. Singh ◽

Narsingh B. Singh ◽

K.D. Mandal

Keyword(s):

Grain Size ◽

Dielectric Properties ◽

Size Effects ◽

Grain Size Effects

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The role of interfaces on an apparent grain size effect on the dielectric properties for ferroelectric barium titanate ceramics

Ferroelectrics ◽

10.1080/00150199808009168 ◽

1998 ◽

Vol 206 (1) ◽

pp. 337-353 ◽

Cited By ~ 291

Author(s):

M. H. Frey ◽

Z. Xu ◽

P. Han ◽

D. A. Payne

Keyword(s):

Grain Size ◽

Dielectric Properties ◽

Barium Titanate ◽

Size Effect ◽

Grain Size Effect ◽

Titanate Ceramics

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Grain size effects on the dielectric properties of ferroelectric Bi2VO5.5 ceramics

Journal of Materials Science ◽

10.1007/bf00356819 ◽

1994 ◽

Vol 29 (10) ◽

pp. 2691-2696 ◽

Cited By ~ 37

Author(s):

K. V. R. Prasad ◽

A. R. Raju ◽

K. B. R. Varma

Keyword(s):

Grain Size ◽

Dielectric Properties ◽

Size Effects ◽

Grain Size Effects

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Grain Size Dependence of the Microstructure and Dielectric Properties of Potassium Niobate-Barium Titanate Ceramics

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.566.34 ◽

2013 ◽

Vol 566 ◽

pp. 34-37

Author(s):

Kenta Yamashita ◽

Ichiro Fujii ◽

Kouichi Nakashima ◽

Nobuhiro Kumada ◽

Yoshihiro Kuroiwa ◽

...

Keyword(s):

Dielectric Constant ◽

Grain Size ◽

Dielectric Properties ◽

Barium Titanate ◽

Size Dependence ◽

Potassium Niobate ◽

Titanate Ceramics

In this study, 0.8 KNbO3(KN) -0.2 BaTiO3(BT) ceramics were prepared using KN powder with the diameter of 100 nm and BT powders with the diameter of 100, 300, or 500 nm. The relative densities were more than 96 % of the theoretical densities of the samples. The dielectric constant of the samples was temperature-stable at temperatures between-50 and 300 °C and it was found that the dielectric constant of the 0.8KN-0.2BT ceramics increased as the BT diameter increased.

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