Barium titanate coated with magnesium titanate via fused salt method and its dielectric property

Barium titanate fine particles were coated homogeneously with magnesium titanate via the fused salt method. The thickness of the magnesium titanate film is 20 nm, as verified by TEM and XRD. The mechanism of the coating is that: when magnesium chloride is liquated in 800 °C, magnesium will replace b...

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Bibliographic Details
Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2003-05, Vol.99 (1), p.302-305
Main Authors: Chen, Renzheng, Cui, Aili, Wang, Xiaohui, Li, Longtu
Format: Article
Language:English
Subjects:
Barium titanate
Coating
Dielectric constant
Fused salt method
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Summary:Barium titanate fine particles were coated homogeneously with magnesium titanate via the fused salt method. The thickness of the magnesium titanate film is 20 nm, as verified by TEM and XRD. The mechanism of the coating is that: when magnesium chloride is liquated in 800 °C, magnesium will replace barium in barium titanate, and form magnesium titanate film on the surface of barium titanate particles. Ceramics sintered from the coated particles show improved high frequency ability. The dielectric constant is about 130 at the frequency from 1 to 800 MHz.
ISSN:0921-5107
1873-4944
DOI:10.1016/S0921-5107(02)00557-3