Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 549, Issue -, Pages 283-287Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.09.001
Keywords
Pb[(Mg1/3Nb2/3)(1-x)Zr-x]O-3 ceramics; Relaxor ferroelectrics; Dielectric tunability; Nanopolar clusters
Categories
Funding
- National Natural Science Foundation [51172187]
- SPDRF [20116102130002]
- 111 Program of MOE [B08040]
- Xi'an Science and Technology Foundation of China [XA-AM-201003]
- Fundamental Research Foundation [NPU-FRF-200703, NPU-FRF-JC201232]
- SKLSP Research Fund of China [40-QZ-2009]
- Doctoral fund of Ministry of Education of China [20116102120016]
- Natural Science Foundation of Shaanxi Province [2011JM6016]
- Shaanxi Province Foundation for Returned Scholars
- High-level person start-up Funding of NWPU
- China Postdoctoral Science Foundation [W016319]
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Pb[(Mg1/3Nb2/3)(1-x)Zr-x]O-3 (x = 0.03, 0.06, 0.09, 0.12) ceramics were prepared using a solid state reaction process. The phase structure and surface micrograph were analyzed by X-ray diffraction and scanning electron microscopy. The effects of Zr content on the dielectric and dielectric tunability properties were investigated systematically. The results showed that the high dielectric tunability (>75% at x = 0.12), low dielectric loss (<0.15%) and high temperature stability of these relaxor ferroelectric ceramics were favorable and competitive to those of titanium-containing perovskite structure materials for tunable device applications. The high dielectric non-linear properties were further discussed in terms of the Landau-Ginsberg-Devonshire thermodynamic theory completed with a Langevin term. (C) 2012 Elsevier B.V. All rights reserved.
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