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Phase Diagram

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Updated: Dec 29, 2025

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

High Entropy Oxide Phases with Perovskite Structure.

Denis A Vinnik¹, Evgeny A Trofimov¹, Vladimir E Zhivulin¹

¹Material science and physics&chemistry of materials, South Ural State University (National Research University), 454080 Chelyabinsk, Russia.

Nanomaterials (Basel, Switzerland)

|February 9, 2020

Summary

High entropy single-phase perovskites were successfully synthesized using solid-state sintering. Optimal temperatures between 1150-1400 °C yielded microcrystalline perovskites with a cubic structure.

Keywords:

high entropy phases multicomponent oxides perovskite phase equilibria solid-phase sintering

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Area of Science:

Materials Science
Solid-State Chemistry

Background:

Perovskites are a class of materials with diverse applications.
High entropy materials offer enhanced properties due to multi-elemental substitution.
Synthesizing single-phase high entropy perovskites remains challenging.

Purpose of the Study:

To investigate the formation of high entropy single-phase perovskites via solid-state sintering.
To explore various oxide systems for perovskite synthesis.
To characterize the structural and dielectric properties of the synthesized materials.

Main Methods:

Solid-state sintering of multiple oxide systems (e.g., BaO-SrO-CaO-MgO-PbO-TiO2, Na2O-K2O-CaO-La2O3-Ce2O3-TiO2).
Temperature optimization for synthesis between 1150 °C and 1400 °C.
Characterization using EDX for chemical composition, and analysis of morphology, crystal parameters, and dielectric properties.

Main Results:

Successful synthesis of microcrystalline single-phase perovskites within the optimal temperature range.
Identification of a specific composition Na0.30K0.07Ca0.24La0.18Ce0.21TiO3 with a cubic structure.
Comparison of properties with pure BaTiO3, indicating potential for tailored material characteristics.

Conclusions:

Solid-state sintering is a viable method for producing high entropy single-phase perovskites.
The synthesized perovskite exhibits a cubic structure and unique compositional characteristics.
Further research can explore the dielectric properties and applications of these novel high entropy perovskites.