(TiZrHf)P2O7: An equimolar multicomponent or high entropy ceramic with good thermal stability and low thermal conductivity

(TiZrHf)P2O7: An equimolar multicomponent or high entropy ceramic with good thermal stability and low thermal conductivity
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(TiZrHf)P2O7:等摩尔多元或高熵陶瓷,具有良好的热稳定性和低导热率

DOI:
10.1016/j.jmst.2019.05.030
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发表时间:
2019-08
影响因子:
10.9
通讯作者:
Zhou Yanchun
Zhou Yanchun
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhao Zifan;Xiang Huimin;Dai Fu Zhi;Peng Zhijian;Zhou Yanchun

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ZrP2O7 是一种有前途的高温绝缘材料。然而,1400℃以上的分解是限制其高温应用的瓶颈。为了提高热稳定性,受高熵陶瓷(HEC)概念的启发,本工作设计并成功合成了一种新型多元等摩尔固溶体(TiZrHf)P2O7。合成的(TiZrHf)P2O7具有良好的热稳定性,在1550°C加热3小时后不分解。与构成金属焦磷酸盐 TiP2O7、ZrP2O7 和 HfP2O7 相比,它还表现出较低的导热率 (0.78 W m−1K−1)。高热稳定性和低导热率的结合使得 (TiZrHf)P2O7 在高温隔热应用中具有广阔的前景。
ZrP2O7is a promising material for high temperature insulating applications. However, decomposition above 1400 °C is the bottleneck that limiting its application at high temperatures. To improve the thermal stability, a novel multicomponent equimolar solid solution (TiZrHf)P2O7was designed and successfully synthesized in this work inspired by high-entropy ceramic (HEC) concept. The as-synthesized (TiZrHf)P2O7exhibits good thermal stability, which is not decomposed after heating at 1550 °C for 3 h. It also shows lower thermal conductivity (0.78 W m−1K−1) compared to the constituting metal pyrophosphates TiP2O7, ZrP2O7and HfP2O7. The combination of high thermal stability and low thermal conductivity renders (TiZrHf)P2O7promising for high temperature thermal insulating applications.
熵稳定的氧化物。
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