Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics
A careful, systematic investigation of Ba6−3xLn8+2xTi18O54 (BLnTss) ceramics has been performed in order to understand the relationship between composition, microstructure evolution, and microwave dielectric properties. In this paper, we report the effects of composition, morphology, and sintering t...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/373079 |
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| author | Amanda L. Snashall Yun Liu Frank Brink Ray L. Withers Steven Cooper |
| author_facet | Amanda L. Snashall Yun Liu Frank Brink Ray L. Withers Steven Cooper |
| author_sort | Amanda L. Snashall |
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| description | A careful, systematic investigation of Ba6−3xLn8+2xTi18O54 (BLnTss) ceramics has been performed in order to understand the relationship between composition, microstructure evolution, and microwave dielectric properties. In this paper, we report the effects of composition, morphology, and sintering time on the phase relations and properties of BLnTss (Ln = Nd, Nd/Sm, Sm) ceramics. The microwave dielectric properties of the materials are reported in addition to phase characterisation and structural analysis via X-ray diffraction and field emission scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. BLnTss,
x=0.33, ceramics with high Sm content are found to experience a severe degradation of Qf and changes in τcf trending, associated with the onset of globular and needle-like grain morphology and a Ba-Ti rich phase. x=0.67 ceramics with high Nd content are found to exhibit a secondary phase (Nd2Ti2O7) upon prolonged sintering which resulted in beneficial changes to Qf and τcf without affecting εr. Two BLnTss ceramics compositions with near-zero τcf were successfully synthesised with high Qf and εr values. |
| format | Article |
| id | doaj-art-06a7f5a8138c43d5a1aeac1373052560 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
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| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-06a7f5a8138c43d5a1aeac13730525602025-02-03T01:07:33ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242013-01-01201310.1155/2013/373079373079Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) ElectroceramicsAmanda L. Snashall0Yun Liu1Frank Brink2Ray L. Withers3Steven Cooper4Research School of Chemistry, Australian National University, Acton, Australian Capital Territory 0200, AustraliaResearch School of Chemistry, Australian National University, Acton, Australian Capital Territory 0200, AustraliaCentre for Advanced Microscopy, Australian National University, Acton, Australian Capital Territory 0200, AustraliaResearch School of Chemistry, Australian National University, Acton, Australian Capital Territory 0200, AustraliaMesaplexx Pty. Ltd., 31 Kurilpa Street, West End, Brisbane, Queensland 4101, AustraliaA careful, systematic investigation of Ba6−3xLn8+2xTi18O54 (BLnTss) ceramics has been performed in order to understand the relationship between composition, microstructure evolution, and microwave dielectric properties. In this paper, we report the effects of composition, morphology, and sintering time on the phase relations and properties of BLnTss (Ln = Nd, Nd/Sm, Sm) ceramics. The microwave dielectric properties of the materials are reported in addition to phase characterisation and structural analysis via X-ray diffraction and field emission scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. BLnTss, x=0.33, ceramics with high Sm content are found to experience a severe degradation of Qf and changes in τcf trending, associated with the onset of globular and needle-like grain morphology and a Ba-Ti rich phase. x=0.67 ceramics with high Nd content are found to exhibit a secondary phase (Nd2Ti2O7) upon prolonged sintering which resulted in beneficial changes to Qf and τcf without affecting εr. Two BLnTss ceramics compositions with near-zero τcf were successfully synthesised with high Qf and εr values.http://dx.doi.org/10.1155/2013/373079 |
| spellingShingle | Amanda L. Snashall Yun Liu Frank Brink Ray L. Withers Steven Cooper Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics Advances in Condensed Matter Physics |
| title | Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics |
| title_full | Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics |
| title_fullStr | Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics |
| title_full_unstemmed | Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics |
| title_short | Phase Relations in Ba6−3xLn8+2xTi18O54 (Ln = Nd & Sm) Electroceramics |
| title_sort | phase relations in ba6 3xln8 2xti18o54 ln nd sm electroceramics |
| url | http://dx.doi.org/10.1155/2013/373079 |
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