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URN: urn:nbn:de:swb:90-539803

Lowering the sintering temperature of barium strontium titanate bulk ceramics by barium strontium titanate-gel and BaCu(B₂O₅)

Gleissner, Uwe; Megnin, Christof; Benkler, Manuel; Hertkorn, Daniel; Elsenheimer, Hendrik C; Schumann, Katrin; Paul, Florian; Hanemann, Thomas

Abstract:
In this paper the influence of barium strontium titanate (BST) xerogel as a sinter additive and BaCu(B$_{2}$O$_{5}$) (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∙cm$^{-3}$) was achieved at 950°C.


Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator ISSN: 0862-5468
KITopen ID: 1000053980
HGF-Programm 43.22.03; LK 01
Erschienen in Ceramics silikáty
Band 60
Heft 1
Seiten 1-11
Schlagworte Barium strontium titanate (BST), Ferroelectric ceramics, Mixed oxide route, Sol-gel route, Sintering temperature, BaCu(B2O5) (BCB), Liquid phase
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