Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 5, Pages 5069-5075Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.12.001
Keywords
Microwave sintering; Relaxor ferroelectric; Curie-Weiss law; Vogel-Fulcher relationship
Categories
Funding
- National Natural Science Foundation of China [51072106, 51102159]
- New Century Excellent Talents Program of Chinese Education Ministry [NCET-11-1042]
- Foundation of Shaanxi Educational Committee [12JK0447]
- International Science and Technology Cooperation Project Funding of Shaanxi Province [2012KW-06]
- Academic Leaders Cultivation Program
- Graduate Innovation Fund of Shaanxi University of Science and Technology
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Sr0.7Ba0.3Nb2O6 (SBN70) ceramics were prepared by conventional sintering (CS) and microwave sintering (MWS) techniques. High-density ceramics were obtained by the MWS method in 2 h of cycle time, whereas it took 14 h by the CS method. Samples prepared by both sintering techniques showed single phase formation according to XRD results. It was observed that MWS SBN70 ceramics showed better densification and more uniform grain size than those of CS samples. The dielectric characteristics of both samples showed diffuse phase transition phenomenon features, which was confirmed by linear fitting of the modified Curie-Weiss law. Besides, the relaxor ferroelectric properties of both samples followed the Vogel-Fulcher relationship well. The value of spontaneous polarization (P-s) and the P-E hysteresis loop for MWS samples were significantly higher and slimmer than those of the CS samples, respectively. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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