期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 252, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2020.123242
关键词
Thulium; Amphoteric substitution; Piezoelectric properties; Ferroelectric; Defect
资金
- Program for Creative Research Groups in University of Chongqing [CXQT19031]
- Leading Talents of Scientific and Technological Innovation in Chongqing [CSTCCXLJRC201919]
- Innovation Program for Chongqing's Overseas Returnees [cx2019159]
- Chongqing Research Program of Basic Research and Frontier Technology [CSTC2018jcyjAX0416]
- Chongqing Kehui Postgraduate Innovation and Entrepreneurship Project [09311065, 09311126]
- Training Program of Innovation for Undergraduates in Chongqing [201811551013]
The influences of Tm3+ doping on the microstructure and electric properties of (Ba0.85Ca0.15) (Zr0.1Ti0.9)O-3-x mol %Tm2O3 (BCZT-x%Tm) ceramics fabricated by a solid-state method have been studied. BCZT ceramics was orthorhombic phase, and BCZT-x%Tm (x = 0.3-1) ceramics exhibited the coexistence of orthorhombic and tetragonal phases. The correlation of crystal structure and electric properties confirmed that the substitution position of Tm3+ with amphoteric characteristics was related to Tm3+ content. Especially for BCZT-0.5%Tm ceramics, the obvious amphoteric substitution for both A- and B-sites cations of Tm3+ resulted in the formation of defect dipole. The electric properties of BCZT-x%Tm ceramics were dependent on the phase structure, defects and grain size caused by the introduction of Tm3+, and the relevant defect chemical mechanism was illuminated. The enhanced piezoelectric responses (d(33) = 523 pC/N and d(33)* = 645 p.m./V) were achieved in BCZT-0.5%Tm ceramics, and these findings have essential significance in developing high performance lead-free piezoelectric materials.
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