کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1474588 | 991092 | 2012 | 8 صفحه PDF | دانلود رایگان |
The influence of the microstructure of screen-printed Ba0.6Sr0.4TiO3 ceramic thick-films on their microwave properties has been investigated. The Ba0.6Sr0.4TiO3 powders were synthesized through a sol–gel route. The spray-dried precursors were calcined at different temperatures. Scanning electron microscopy images and BET measurements revealed the primary particle size of calcined powder depending on the calcination temperature. The Ba0.6Sr0.4TiO3 thick-films showed different microstructure after sintering due to the use of two different calcined BST powders as well as varying the sintering conditions. Permittivity, dielectric loss and tunability of thick-films were characterized with coplanar waveguide structures up to 40 GHz. A correlation of microstructure and microwave properties of the thick-films has been observed. Particularly the tunability could be improved by an optimized microstructure.
Journal: Journal of the European Ceramic Society - Volume 32, Issue 16, December 2012, Pages 4311–4318