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Research Article | Open Access | Just Accepted

Suppressing the phase transition of ZrP2O7 by defect and entropy regulation for high-temperature wave-transparent material application

Peng LiuZhilin Tian( )Zhilin ChenShuping WenLiya ZhengBin Li( )

School of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China

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Abstract

ZrP2O7 is a promising wave-transparent material candidate due to the low dielectric constant and low dielectric loss, while the inherent phase transition characteristic at about 300 ℃ limits its high-temperature application. Therefore, suppressing the phase transition is necessary for ZrP2O7 to serve in extremely harsh environments. In this work, introducing Ti and Hf into ZrP2O7 causes significant lattice distortion and an increase in entropy, both of which synergistically limit the crystal structure transformation. In addition, enhanced phonon scattering by mismatch of atomic mass and local distortion leads to a reduction in the thermal conductivity. Lattice distortions also cause changes in both bond length and tilting angle, so that (Ti1/3Zr1/3Hf1/3)P2O7 does not undergo a sudden expansion like ZrP2O7. (Ti1/3Zr1/3Hf1/3)P2O7 maintains excellent dielectric properties, which highlights it as a promising high-temperature wave-transparent material.

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Journal of Advanced Ceramics
Cite this article:
Liu P, Tian Z, Chen Z, et al. Suppressing the phase transition of ZrP2O7 by defect and entropy regulation for high-temperature wave-transparent material application. Journal of Advanced Ceramics, 2024, https://doi.org/10.26599/JAC.2024.9220926

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Received: 04 January 2024
Revised: 11 June 2024
Accepted: 11 June 2024
Available online: 12 June 2024

© The author(s) 2024

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).

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