Screen printed barium strontium titanate thick films for microwave applications
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Colleges, School and Institutes
Powders to be used in inks for screen printing of Ba0.5Sr0.5TiO3 thick films have been prepared by two different routes-calcination of BaCO3, SrCO3 and TiO2 by a conventional solid-state reaction, and thorough mixing of uncalcined nano-sized BaTiO3 and SrTiO3. The effect of these two different production routes on the microstructural properties in terms of grain size and density has been assessed using SEM. Electrical measurements at 1 kHz indicate that both permittivity and dielectric loss are affected by the density of the films. Permittivity also appears to be affected by the grain size of the films, which increases dramatically above a particular sintering temperature. The Curie temperature also decreases as sintering temperature increases and this has been linked to observed Ba diffusion from the film into the alumina substrate. (C) 2003 Elsevier Ltd. All rights reserved.
|Number of pages||5|
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 1 Jan 2003|
- sintering, diffusion, dielectric properties, (Ba,Sr)TiO3, microstructure-final