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Significant enhancement of piezoelectric properties in tetragonal PZN-PT crystals by Tm doping.

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Title: Significant enhancement of piezoelectric properties in tetragonal PZN-PT crystals by Tm doping.
Authors: Dai, Xingyu1 (AUTHOR), Liang, Lianyao1 (AUTHOR), Wang, Cailin2 (AUTHOR), Li, Jian3 (AUTHOR), Wan, Haiqin4 (AUTHOR), Lin, Jiugen4 (AUTHOR), He, Xingchen4 (AUTHOR), Peng, Ling4,5 (AUTHOR), Wang, Kewei1 (AUTHOR), Liu, Ying1,6 (AUTHOR) liuying@fjirsm.ac.cn, Huang, Aigen1,4 (AUTHOR) aghuang@gia.cas.cn, Li, Tao1,4 (AUTHOR) litao@gia.cas.cn
Source: Ceramics International. Dec2025:Part A, Vol. 51 Issue 29, p60611-60617. 7p.
Subject Terms: *PIEZOELECTRICITY, *TETRAGONAL crystal system, *HIGH temperatures, *MORPHOTROPIC phase boundaries, *DOPING agents (Chemistry), *PHASE transitions, *TRANSITION temperature
Abstract: Relaxor-PbTiO 3 based crystals have attracted significant attention over the past three decades due to their exceptional piezoelectric properties. In particular, tetragonal crystals generally exhibit higher Curie temperatures and stability, but their relatively low piezoelectric performance limits their practical applications. In this study, Tm3+ ions were introduced as B-site substitutions to enhance the piezoelectric properties of the Pb(Zn 1/3 Nb 2/3)O 3 - x PbTiO 3 (PZN- x PT) crystal. The results demonstrate that the PZN-13PT crystal, in the tetragonal phase, shows a 150 % increase in piezoelectric coefficient (d 33), reaching 1319 pC/N after Tm3+ doping. The Tm-doped PZN-11PT crystal further demonstrates that introducing Tm3+ induces the phase structure transformation into the rhombohedral phase. Through X-ray diffraction and Gaussian fitting analysis, it was inferred that doping induced a phase shift toward the morphotropic phase boundary, which leads to the coexistence of multiple phases. This phenomenon was believed to synergistically contribute to the high piezoelectric coefficients in Tm-doped tetragonal phase crystals. The observed stripe and watermark domain structure within the crystal domain structure further supported this conclusion. Notably, despite the substantial enhancement in piezoelectric performance, the Curie temperature of the crystals remained largely unchanged, suggesting that Tm-doped crystals have great potential for high-temperature applications. [ABSTRACT FROM AUTHOR]
Database: Academic Search Index
Description
Abstract:Relaxor-PbTiO 3 based crystals have attracted significant attention over the past three decades due to their exceptional piezoelectric properties. In particular, tetragonal crystals generally exhibit higher Curie temperatures and stability, but their relatively low piezoelectric performance limits their practical applications. In this study, Tm3+ ions were introduced as B-site substitutions to enhance the piezoelectric properties of the Pb(Zn 1/3 Nb 2/3)O 3 - x PbTiO 3 (PZN- x PT) crystal. The results demonstrate that the PZN-13PT crystal, in the tetragonal phase, shows a 150 % increase in piezoelectric coefficient (d 33), reaching 1319 pC/N after Tm3+ doping. The Tm-doped PZN-11PT crystal further demonstrates that introducing Tm3+ induces the phase structure transformation into the rhombohedral phase. Through X-ray diffraction and Gaussian fitting analysis, it was inferred that doping induced a phase shift toward the morphotropic phase boundary, which leads to the coexistence of multiple phases. This phenomenon was believed to synergistically contribute to the high piezoelectric coefficients in Tm-doped tetragonal phase crystals. The observed stripe and watermark domain structure within the crystal domain structure further supported this conclusion. Notably, despite the substantial enhancement in piezoelectric performance, the Curie temperature of the crystals remained largely unchanged, suggesting that Tm-doped crystals have great potential for high-temperature applications. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2025.10.109