Effects of TiO<inf>2</inf>and SiO<inf>2</inf>additions on phase formation, microstructures and PTCR characteristics of Sb-doped barium strontium titanate ceramics
Phase formation, densification, microstructural development and the electrical resistivity of Sb-doped Ba0.8Sr0.2TiO3ceramics, containing different sintering additives have been investigated. A secondary phase of (Ba1-xSrx)6Ti17O40was found in samples containing 1 mol% excess TiO2, whereas in sample...
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| Main Authors: | , , , |
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| Format: | Journal |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=20444426220&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/62268 |
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| Institution: | Chiang Mai University |
| Summary: | Phase formation, densification, microstructural development and the electrical resistivity of Sb-doped Ba0.8Sr0.2TiO3ceramics, containing different sintering additives have been investigated. A secondary phase of (Ba1-xSrx)6Ti17O40was found in samples containing 1 mol% excess TiO2, whereas in samples containing a combination of 1 mol% TiO2and 3 mol% SiO2an additional fresnoite solid solution phase, Ba1-ySryTi1+xSi2-xO8, was found to co-exist at intergranular regions. Grain growth was suppressed by the single TiO2additive, but no improvement in densification was observed. However, the combined excess of SiO2and TiO2promoted liquid phase sintering, producing a reduction in sintering temperature from ∼1350 °C to ∼1250 °C; this additive combination also enhanced the PTCR response. © 2004 Elsevier Ltd. All rights reserved. |
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