Interactions between barium strontium titanate (BST) thick films and alumina substrates

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@article{0e316b2a31f04bf6b43bded1fd4ed9a9,
title = "Interactions between barium strontium titanate (BST) thick films and alumina substrates",
abstract = "Barium strontium titanate (BST) thick films have been prepared on alumina substrates using a novel press forming route. The effect of the sintering temperature on the microstructure and dielectric properties of the films has been investigated. Severe interactions between the BST films and alumina substrates has been observed for sintering temperatures >1250 degreesC, with Ba and Sr ions diffusing into the substrates. The counter-diffusion of Al ions into the films resulted in the formation of strontium aluminate and the destabilisation of the BST solid solution. The use of B2O3 as a sintering aid and MgO as a buffer layer is also reported and discussed. MgO is shown to be effective in preventing inter-diffusion between the films and substrates and, although B2O3 is effective in reducing the sintering temperature and improving the dielectric properties of the films, it is not compatible with the current thick film processing route. (C) 2001 Elsevier Science Ltd. All rights reserved.",
keywords = "BST films, alumina substrates, inter-diffusion",
author = "Timothy Button and Bo Su",
year = "2001",
month = jan,
day = "1",
doi = "10.1016/S0955-2219(01)00362-4",
language = "English",
volume = "21",
pages = "2777--2781",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Interactions between barium strontium titanate (BST) thick films and alumina substrates

AU - Button, Timothy

AU - Su, Bo

PY - 2001/1/1

Y1 - 2001/1/1

N2 - Barium strontium titanate (BST) thick films have been prepared on alumina substrates using a novel press forming route. The effect of the sintering temperature on the microstructure and dielectric properties of the films has been investigated. Severe interactions between the BST films and alumina substrates has been observed for sintering temperatures >1250 degreesC, with Ba and Sr ions diffusing into the substrates. The counter-diffusion of Al ions into the films resulted in the formation of strontium aluminate and the destabilisation of the BST solid solution. The use of B2O3 as a sintering aid and MgO as a buffer layer is also reported and discussed. MgO is shown to be effective in preventing inter-diffusion between the films and substrates and, although B2O3 is effective in reducing the sintering temperature and improving the dielectric properties of the films, it is not compatible with the current thick film processing route. (C) 2001 Elsevier Science Ltd. All rights reserved.

AB - Barium strontium titanate (BST) thick films have been prepared on alumina substrates using a novel press forming route. The effect of the sintering temperature on the microstructure and dielectric properties of the films has been investigated. Severe interactions between the BST films and alumina substrates has been observed for sintering temperatures >1250 degreesC, with Ba and Sr ions diffusing into the substrates. The counter-diffusion of Al ions into the films resulted in the formation of strontium aluminate and the destabilisation of the BST solid solution. The use of B2O3 as a sintering aid and MgO as a buffer layer is also reported and discussed. MgO is shown to be effective in preventing inter-diffusion between the films and substrates and, although B2O3 is effective in reducing the sintering temperature and improving the dielectric properties of the films, it is not compatible with the current thick film processing route. (C) 2001 Elsevier Science Ltd. All rights reserved.

KW - BST films

KW - alumina substrates

KW - inter-diffusion

UR - http://www.scopus.com/inward/record.url?scp=0035194574&partnerID=8YFLogxK

U2 - 10.1016/S0955-2219(01)00362-4

DO - 10.1016/S0955-2219(01)00362-4

M3 - Article

VL - 21

SP - 2777

EP - 2781

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

ER -