Design of New High Entropy Ceramics in the Pseudo-Binary System RGaO3-R2Ti2O7

Victor Emmanuel Alvarez-Montaño*, Francisco Brown, Jorge Mata Ramírez, Subhash Sharma, Ofelia Hernández Negrete, Javier Hernández Paredes, V. E.Alejandro Durán

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In the last years, high entropy ceramics (HECs) compounds have attracted significant attention due to their unique chemical compositions and crystal structure which make them potentially useful functional materials. One of them is the RGa1/3Ti2/3O10/3 (R: rare earth element) ceramic layered compound, which comes from the pseudo-binary system RGaO3–R2Ti2O7 partial solid solution. In this work, we design a single phase of (Lu0.2Yb0.2Tm0.2Er0.2Ho0.2)Ga1/3Ti2/3O10/3 high entropic ceramic compound. This compound was synthesized by the solid-state reaction method and employing several thermal treatments at high temperatures. The phase stability was determined using X-ray powder diffractometry analysis (XRD). The morphology and cation distribution in the samples were identified using scanning electron microscopy (SEM) and elemental mapping. In addition, the dielectric behavior of samples exposed under several heating treatments is presented.

Original languageEnglish
Title of host publicationTMS 2022 151st Annual Meeting and Exhibition Supplemental Proceedings
PublisherSpringer Science and Business Media Deutschland GmbH
Pages571-578
Number of pages8
ISBN (Print)9783030923808
DOIs
StatePublished - 2022
Event151st Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2022 - Anaheim, United States
Duration: 27 Feb 20223 Mar 2022

Publication series

NameMinerals, Metals and Materials Series
ISSN (Print)2367-1181
ISSN (Electronic)2367-1696

Conference

Conference151st Annual Meeting and Exhibition of The Minerals, Metals and Materials Society, TMS 2022
Country/TerritoryUnited States
CityAnaheim
Period27/02/223/03/22

Bibliographical note

Funding Information:
VEAM thanks the Department of Chemical Engineering and Metallurgy (University of Sonora) for supporting this work. A.D. thanks project PAPIIT-UNAM IN101919.

Publisher Copyright:
© 2022, The Minerals, Metals & Materials Society.

Keywords

  • High entropy ceramics
  • Microstructure
  • Phase stability
  • RGa/Ti/O

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