Enhanced temperature stability in the R–T phase boundary with dominating intrinsic contribution

Literature Information

Publication Date 2018-07-05
DOI 10.1039/C8CP02891E
Impact Factor 3.676
Authors

Xiang Lv, Jiagang Wu, Jianguo Zhu, Dingquan Xiao


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Abstract

In this study, 0.96KNNSx–0.01SZ–0.03BNZ ceramics (x = 0–0.08) were used as examples to illustrate the effects of phase boundaries on strain property and temperature stability. The addition of Sb5+ resulted in a rhombohedral–tetragonal (R–T) phase boundary at x = 0.05–0.07, as confirmed by temperature-dependent Raman spectra. In the R–T region, an improved piezoelectric constant (d33 = 390–440 pC N−1) and high unipolar strain (Suni = 0.14–0.15%) were observed due to the dominating intrinsic contribution. More importantly, a favorable temperature stability of Suni was observed in the ceramics with x = 0.05; for example, there was a slight variation of +5% to −13% when the temperature was increased from 20 °C to 180 °C. Through systematic investigations of composition and temperature-dependent strain, methods to improve Suni and consolidate its temperature stability in KNN-based ceramics were subsequently suggested. We believe that this study can promote the understanding and design of KNN-based ceramics with high strain and favorable temperature stability.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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