Current Progress and Challenges of Electromagnetic Wave Absorbing Materials at High Temperature

Area of Science:

• Materials Science
• Electromagnetics
• Engineering

Background:

• Electromagnetic waves are pervasive, necessitating effective electromagnetic protection.
• Electromagnetic wave absorbing materials (EMWAMs) convert electromagnetic energy to heat, reducing reflection and scattering.
• Existing research primarily addresses normal-temperature EMWAMs, with limited options and understanding for high-temperature applications.

Purpose of the Study:

• To discuss electromagnetic loss mechanisms for high-temperature EMWAMs.
• To review and address challenges in testing EMWAMs at elevated temperatures, particularly above 800 °C.
• To propose a selection criterion for high-temperature EMWAMs.

Main Methods:

• Literature review and analysis of electromagnetic loss mechanisms at high temperatures.
• Discussion of current challenges and potential solutions for high-temperature EMWAM testing.
• Development of a framework for selecting suitable EMWAMs for high-temperature environments.

Main Results:

• The electromagnetic loss mechanisms of EMWAMs change significantly at elevated temperatures.
• Standard testing methods for EMWAMs are often inadequate for high-temperature characterization.
• A proposed selection criterion aims to guide the choice of EMWAMs for demanding high-temperature applications.

Conclusions:

• Understanding high-temperature electromagnetic loss mechanisms is crucial for developing effective EMWAMs.
• Standardized and reliable testing methods are needed for high-temperature EMWAM evaluation.
• The proposed selection criterion provides a valuable guideline for material selection in extreme thermal environments.