The processing and properties of barium strontium titanate thick films foruse in frequency agile microwave circuit applications

Authors
Su, B Button, TW
Citation
B. Su et Tw. Button, The processing and properties of barium strontium titanate thick films foruse in frequency agile microwave circuit applications, J EUR CERAM, 21(15), 2001, pp. 2641-2645
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
21
Issue
15
Year of publication
2001
Pages
2641 - 2645
Database
ISI
SICI code
0955-2219(2001)21:15<2641:TPAPOB>2.0.ZU;2-U
Abstract
Barium strontium titanate (BST) thick films for use in frequency agile micr owave circuit applications have been investigated. A potentially cost-effec tive processing route has been used to make BST thick films from mixed-oxid e powders. BST thick films have been press-formed in a single step onto alu mina substrates from a viscous polymer tape. Films with thicknesses ranging from 10 to 140 mum have been obtained. The microstructure and dielectric p roperties of the BST thick films have been characterised. The results show that Ba0.7Sr0.3TiO3 thick films exhibit similar to 20% tunability at room t emperature under a DC bias field of 5.5 kV/cm. Possibilities for further im provements are discussed in terms of reducing the interactions between the BST films and alumina substrates. (C) 2001 Elsevier Science Ltd. All rights reserved.