Phase Structure and Phase Stability Studies of La-Y Co-doped HfO2Materials and Coatings

Hanqi Zhao, Jianbin Fan, Quansheng Wang*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

In this study, The 30 mol% La-Y co-doped HfO2 was prepared by solid-phase synthesis and the effect of the doping content of La element on the phase structure and high temperature phase stability was investigated by XRD. The results show that LaYSH is pyrochlore p-phase + fluorite c-phase when the doping content of La element is 6 and 9 mol%, and a single fluorite c-phase when the doping content is 0-3 mol%. After sintering at 1600 C for 50 h, 0, 1 and 2 LaYSH remained as a single fluorite c-phase, 3 LaYSH produced 2.54 wt% pyrochlore p-phase, and the pyrochlore p-phase content in 6 and 9 LaYSH decreased to varying degrees. The prepared 0, 1 and 2 LaYSH coatings all had a single c-phase and remained unchanged in the single c-phase when sintered at 1600 C for 50 hours, demonstrating their good high temperature phase stability.

Original languageEnglish
Article number01028
JournalE3S Web of Conferences
Volume406
DOIs
Publication statusPublished - 31 Jul 2023
Event9th International Conference on Energy Materials and Environment Engineering, ICEMEE 2023 - Virtual, Online, Malaysia
Duration: 8 Jun 202310 Jun 2023

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