Bharathi, P and Varma, KBR (2014) Grain and the concomitant ferroelectric domain size dependent physical properties of Ba0.85Ca0.15Zr0.1Ti0.9O3 ceramics fabricated using powders derived from oxalate precursor route. In: JOURNAL OF APPLIED PHYSICS, 116 (16).
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Abstract
Fine powders comprising nanocrystallites of Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) were synthesized via oxalate precursor method, which facilitated to obtain homogenous and large grain sized ceramics at a lower sintering temperature. The compacted powders were sintered at various temperatures in the range of 1200 degrees C-1500 degrees C for an optimized duration of 10 h. Interestingly the one that was sintered at 1450 degrees C/10 h exhibited well resolved Morphotrophic Phase Boundary. The average grain size associated with this sample was 30 mu m accompanied by higher domain density mostly with 90 degrees twinning. These were believed to have significant contribution towards obtaining large strain of about 0.2% and piezoelectric coefficient as high as 563 pC/N. The maximum force that was generated by BCZT ceramic (having 30 mu m grain size) was found to be 161 MPa, which is much higher than that of known actuator materials such as PZT (40MPa) and NKN-5-LT (7 MPa). (C) 2014 AIP Publishing LLC.
| Item Type: | Journal Article |
|---|---|
| Publication: | JOURNAL OF APPLIED PHYSICS |
| Publisher: | AMER INST PHYSICS |
| Additional Information: | Copyright for this article belongs to the AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA |
| Department/Centre: | Division of Chemical Sciences > Materials Research Centre |
| Date Deposited: | 20 Dec 2014 05:26 |
| Last Modified: | 20 Dec 2014 05:26 |
| URI: | http://eprints.iisc.ac.in/id/eprint/50481 |
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