Ceramics-Silikáty 60, (1) 1 - 11 (2016) |
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LOWERING THE SINTERING TEMPERATURE OF BARIUM STRONTIUM TITANATE BULK CERAMICS BY BARIUM STRONTIUM TITANATE-GEL AND BaCu(B₂O₅)
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Gleissner Uwe 1, Megnin Christof 1, Benkler Manuel 1,
Hertkorn Daniel 1,
Elsenheimer Hendrik 1,
Schumann Katrin 1,
Paul Florian 1,
Hanemann Thomas 2,1
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1 University of Freiburg, IMTEK, Laboratory for Materials Processing, Georges-Köhler-Allee 102, 79110 Freiburg, Germany
2 Karlsruhe Institute of Technology (KIT), Institute for Applied Materials - Materials Process Technology, Hermann von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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Keywords: Barium strontium titanate (BST), Ferroelectric ceramics, Mixed oxide route, Sol-gel route, Sintering temperature, BaCu(B₂O₅) (BCB), Liquid phase
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In this paper the influence of barium strontium titanate (BST) xerogel as a sinter additive and BaCu(B₂O₅)(BCB) as a liquid phase sintering aid on the sintering behavior of BST bulk ceramics is investigated. BST as well as BCB powders were synthesized via a mixed oxide route and BST gel via a sol-gel process. Compared to pure BST bulk ceramics, BST gel reduces the sintering start (onset temperature) by up to 174°C and increases the density for a sintering temperature of 1200°C. By adding BCB to the BST powder the sintering was completed much faster and the onset temperatures were reduced by 281°C and 312°C for 1 mol% and 2.5 mol%, respectively. With 2.5 mol% BCB, the highest density of 96 % (5.41 g/cm³) was achieved at 950°C. |
Record in: Scopus | Web of Science |
 PDF (3.9 MB) |
doi: 10.13168/cs.2016.0001
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