材料科学
电介质
声子
凝聚态物理
相变
热导率
拉曼散射
散射
晶体结构
拉曼光谱
光学
光电子学
结晶学
复合材料
化学
物理
作者
Peng Liu,Tian Zhao,Zhilin Chen,Shuping Wen,Liya Zheng,Bin Li
标识
DOI:10.26599/jac.2024.9220926
摘要
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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