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Characterization of (1-x)[Bi12In0.5O18.75+γ-Bi2O3]:(x)PbTiO3 ceramics by C.W. Tai; K.Z. Baba-kishi; H.L.W. Chan; F.G. Shin; C.L. Choy is a Materials Science article available to read on EtoBox.

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The ceramic system with composition (1-x )[Bi 12 In 0.5 O 18.75 '/g-Bi 2 O 3 ]:(x )PbTiO 3 with x0/0.0, 0.3, 0.5 and 0.8 was synthesized and subsequently characterized for its crystal structure and dielectric properties. X-ray diffraction showed that the ceramic with nominal composition Bi 12 In 0.5 O 18.75 '/g-Bi 2 O 3 has sillenite structure, which is an uncommon metastable mineral phase with composition Bi 12 In 0.5 O 18.75 . The dielectric constants and loss tangents were measured at different frequencies and temperatures. The dielectric properties of the sample with x0/0.0, Bi 12 In 0.5 O 18.75 '/g-Bi 2 O 3 , showed strong frequency and temperature dependence of dielectric constant and loss tangent. The high value of both the dielectric constant and loss tangent showed a conductivity value similar to a typical semiconductor. The addition of PbTiO 3 significantly reduced the temperature and frequency dependence at the low frequency range. For the sample x0/0.8 (80% PbTiO 3 ) the dielectric properties are similar to a typical dielectric material and the conductivity was not revealed in the loss tangent. The results indicate that the electrical properties of (1-x )[Bi 12 In 0.5 O

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Author

C.W. Tai; K.Z. Baba-kishi; H.L.W. Chan; F.G. Shin; C.L. Choy

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd; Elsevier BV (ISSN 0921-5107)

Published

2003

Language

EN

Field

Materials Science (Physical Sciences)