(TiZrHf)P2O7: An equimolar multicomponent or high entropy ceramic with good thermal stability and low thermal conductivity. Issue 10 (October 2019)

• Record Type: Journal Article
• Authors: Zhao, Zifan; Xiang, Huimin; Dai, Fu-Zhi; Peng, Zhijian; Zhou, Yanchun
• Is Part Of: Journal of materials science & technology. Volume 35:Issue 10(2019)
• Page Start: 2227
• Page End: 2231
• Publication Date: 2019-10
• Subjects: Metal phosphates -- (TiZrHf)P2O7 -- High-entropy ceramics -- Thermal stability -- Thermal conductivity; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2019.05.030
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: ZrP2 O7 is 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)P2 O7 was designed and successfully synthesized in this work inspired by high-entropy ceramic (HEC) concept. The as-synthesized (TiZrHf)P2 O7 exhibits 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 −1 K −1 ) compared to the constituting metal pyrophosphates TiP2 O7, ZrP2 O7 and HfP2 O7 . The combination of high thermal stability and low thermal conductivity renders (TiZrHf)P2 O7 promising for high temperature thermal insulating applications.