Enhanced electrical properties of lead-free BNLT-BZT ceramics by thermal treatment technique
Electrical properties of lead-free solid solution ceramics from the Bi 0.4871Na0.4871La0.0172TiO3 (BNLT) and BaZr0.05Ti0.95O3 (BZT) system have been improved by a thermal treatment technique. A modified two step mixed-oxide method was employed for the preparation of the (1-x)BNLT-xBZT ceramics, wher...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84875723539&partnerID=40&md5=ac17634bd51aedf7895539df320053d9 http://cmuir.cmu.ac.th/handle/6653943832/6909 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Electrical properties of lead-free solid solution ceramics from the Bi 0.4871Na0.4871La0.0172TiO3 (BNLT) and BaZr0.05Ti0.95O3 (BZT) system have been improved by a thermal treatment technique. A modified two step mixed-oxide method was employed for the preparation of the (1-x)BNLT-xBZT ceramics, where x=0.06, 0.09, 0.12 and 0.20. After sintering at 1125 °C for 4 h, the BNLT-BZT ceramics were annealed at 825, 925 and 1025 °C. The annealing treatment caused an increase in dielectric constant of BNLT-BZT ceramics with x≤0.09 mol% and with x higher than 0.09 mol% the dielectric value dropped considerably. The ferroelectric properties of all annealed ceramic samples tend to decrease with increasing annealing temperature as confirmed by the slimmer P-E loops. The piezoelectric coefficient (d33) increased with annealing temperatures and a maximum value of ∼170 pC/N was obtained from the ceramic samples annealed at 1025 °C with x=0.02. © 2012 Elsevier Ltd and Techna Group S.r.l. |
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