Entropy-Assisted High-Entropy Oxide with a Spinel Structure toward High-Temperature Infrared Radiation Materials

Area of Science:

• Materials Science
• Solid-state Chemistry
• Nanotechnology

Background:

• High-entropy materials offer tunable properties through atomic composition.
• Oxides with high configurational entropy are promising for advanced applications.
• Infrared radiation materials require high emissivity and thermal stability.

Purpose of the Study:

• To synthesize and characterize a novel high-entropy oxide (HEO) powder, (Cu, Mn, Fe, Cr)3O4.
• To evaluate the infrared radiation performance and thermal stability of the synthesized HEO.
• To explore the potential of this HEO for energy-related applications.

Main Methods:

• Solid-phase synthesis for scalable production of (Cu, Mn, Fe, Cr)3O4.
• Microstructure and chemical composition analysis using advanced techniques.
• Infrared emissivity measurements across various wavelengths and temperatures.

Main Results:

• A single-phase spinel structure of (Cu, Mn, Fe, Cr)3O4 was successfully synthesized.
• The HEO powder demonstrated high infrared emissivity (0.879 and 0.848) and excellent thermal stability.
• The HEO coating achieved high emissivity values (0.955 at room temp, 0.936 at 800 °C).

Conclusions:

• The study presents a viable strategy for laboratory mass production of HEO for infrared radiation.
• (Cu, Mn, Fe, Cr)3O4 shows significant potential for energy-related applications due to its radiative properties.
• The findings contribute to the development of advanced high-entropy materials for thermal management and energy conversion.