Journal
RSC ADVANCES
Volume 7, Issue 32, Pages 19448-19456Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra01638g
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Funding
- Natural Science Foundation of China [21373224, 21577143, 51502289]
- Natural Science Foundation of Fujian Province [2014H0054, 2016J05144]
- open project program of the CAS Key Laboratory of Inorganic Functional Materials and Devices [KLIFMD-2014-03]
- One Hundred Talents Program of the Chinese Academy of Sciences
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Ceramics of the Bi(Ni3/4W1/4)O-3-PbTiO3 (BNW-PT) ferroelectric system were synthesized using a conventional solid-state sintering process. A morphotropic phase boundary (MPB) region separating tetragonal and rhombohedral phases has been determined based on X-ray diffraction (XRD) analysis. The composition-dependent phase transition behavior, thermal expansion, di/ferro/piezoelectric properties have been systemically investigated. The volume TECs (thermal expansion coefficients) for 0.1BNW-0.9PT and 0.2BNW-0.8PT are -1.01 x 10(-5) per degrees C and -0.94 x 10(-5) per degrees C, respectively, indicating the negative thermal expansion of some compositions for the binary system. The BNW-PT ceramics have Curie temperatures, T-C, ranging from 460 degrees C to similar to 152 degrees C with the variation of BNW constituent. The tetragonal-rich composition 0.20BNW-0.80PT is found to have the largest remnant polarization, P-r similar to 23.4 mu C cm(-2). The highest piezoelectric coefficient d(33) similar to 145 pC N-1 is achieved at MPB composition 0.32BNW-0.68PT. The maximum strain value similar to 0.194% is also obtained in the 0.32BNW-0.68PT ceramic.
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