Electromagnetic Wave Absorbing Materials

Hongjing Wu is Full Professor at the Department of Applied Physics, Northwestern Polytechnical University, China. His research focuses on heterogeneous environmental catalysis, electromagnetic wave shielding absorption (stealth) materials, and other areas. He received his PhD. in Materials Physics and Chemistry from Northwestern Polytechnical University. From late 2012 to late 2013, he conducted research at the Institute of Nanostructured Materials (CNR-ISMN) of the Italian Academy of Sciences. Jun Luo is Full Professor in the Integrated Circuit Advanced Process R&D Center of the Institute of Microelectronics, Chinese Academy of Sciences (IMECAS), where he also holds the position of vice president. His research endeavors primarily concentrate on contact and interconnect technology, magneto-resistive random access memory (MRAM), fully depleted silicon-on-insulator (FDSOI), and other related fields. He obtained his Ph.D. in microelectronics and applied physics from the Royal Institute of Technology (KTH) in Sweden in 2010. Since then, he has been working at IMECAS, continuously contributing to its advancements. Meiyin Yang is Assistant Professor at the Key Laboratory of Microelectronic Devices & Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences (IMECAS). Her research primarily centers on the field of magneto-resistive random access memory, encompassing its materials, devices, and applications. After receiving her PhD degree from Beijing University of Science and Technology, she worked at the Institute of Semiconductors, Chinese Academy of Sciences from 2014 to 2018. Since 2018, she has been working at IMECAS.

Table of Contents

Overview of Works

Acknowledgments

1 Metal-Organic Frameworks-based Electromagnetic Wave Absorption Materials

Zijing Li

1.1 Introduction of Metal-Organic Frameworks

1.2 Preparation Method of MOF Materials

1.2.1 Solvothermal Method

1.2.2 Microwave-Assisted Synthesis Method

1.2.3 Electrochemical Synthesis Method

1.2.4 Ultrasonic Method

1.2.5 Mechanochemistry Method

1.2.6 Steam-Assisted Conversion Method

1.2.7 Fluid Chemistry Method

1.3 MOF-Derived Electromagnetic Wave Absorption Materials

1.3.1 Monometallic MOF-Derived Absorption Materials

1.3.2 Multi-metal MOF-Derived Absorption Materials

1.3.3 MOF-Carbon Composite Absorption Materials

1.3.4 MOF-MXene Composite Absorption Materials

1.3.5 MOF-Conductive Polymer Composite Absorption Materials

1.4 Summarize and Prospect

References

2 2D MXenes Electromagnetic Wave Absorption Materials

Weibin Deng

2.1 Preparation Method of MXenes

2.1.1 Top-down Strategy

2.2.2 Bottom-up Strategies

2.2 The Properties of MXenes

2.3 Electromagnetic Wave Absorption Performance of Pure MXenes

2.4 Classification of MXenes in Electromagnetic Wave Absorbing Materials

2.4.1 Component Optimization

2.4.2 Structural Regulation

2.5 The Application Prospects of MXenes in Electromagnetic Wave Absorbing Materials

References

3. High Entropy Electromagnetic Wave Absorption Materials

Shengchong Hui

3.1 The Concept, Features of High-Entropy Materials (HEM)

3.1.1 The Definition of HEM

3.1.2 Broaden Elemental Combination and Microstructure

3.1.3 Dialectical View of Single-Phase Solid Solution Properties

3.1.4 The Theoretical Approach of Phase Selection in HEM

3.1.5 Four Core Effects of HEM

3.2 The Synthesis Approach and Advanced Characterization of HEM

3.2.1 HEM synthesis

3.2.2 Advanced Characterization of HEM

3.3 High-entropy electromagnetic wave absorption materials

3.3.1 High-entropy alloy

3.3.2 High-entropy oxide

3.3.3 High-entropy sulfide

3.4 The challenge and prospects of HEM

References

4. Novel Microscopic Electromagnetic Loss Mechanisms

Hongsheng Liang

4.1 Novel Dielectric Loss Mechanisms

4.1.1 Synergistic Effects of Selenium-Sulfur Co-Doping Induced Dielectric Polarization

4.1.2 Synergistic Effects of Hybridization State-Induced Dielectric Polarization

4.1.3 Synergistic Effects of Twin Structure-Induced Dielectric Polarization

4.1.4 Synergistic Effects of 3d Orbitals Unpaired Electron-Induced Dielectric Polarization

4.1.5 Interpretation of Energy Band Theory in Dielectric Loss

4.1.6 Defect Induced Polarization Loss in Multi-Dhelled Spinel Hollow Spheres

4.2 Novel Microscopic Magnetic Loss Mechanisms

4.2.1 Magnetic Losses Induced by The Sequence Structure of Metallic Magnetic Chains

4.2.2 Multi-model Sequence Structure for Improving Magnetic Loss

4.2.3 Enhanced Magnetic Coupling in Hollow Porous Carbon Three-dimensional Magnetic Networks

4.3 Conclusion and Outlook

References

5. Bridging Mechanisms Between Micro and Macro

Geng Chen, Tao Zhang, and Yuntong Wang

5.1 Introduction of Micro Factors

5.1.1 Defects

5.1.2 Interfaces

5.1.3 Conductivity

5.1.4 Dipole

5.1.5 Saturation Magnetization

5.2 Regulation of Microscopic Attributes

5.2.1 Conventional Regulation

5.2.2 Physical External Fields Regulation

5.3 The Current State and Future Potential of Bridge Mechanism Between Micro and Macro Levels

References

6. New Dielectric Physical Models for Electromagnetic Wave Absorption

Hongsheng Liang

6.1 Dielectric Microphysical Model

6.1.1 Dimension Distribution-induced Interfacial Polarization Model

6.1.2 Three Types of Polarization Site Models

6.1.3 Electron Hopping and Electron Migrating Model

6.1.4 Three-dimensional Conductive Network Model in Foam

6.1.5 Disordered Structure on the Atomic Scale-high Entropy Models

6.2 Physical Models Related to Structural Design

6.2.1 Hierarchical Structural Models for Improved Impedance Matching

6.2.2 Core-shell Structure Model

6.2.3 Double-shell Structure Model

6.3 Intelligent Off/On Switchable Model

6.4 Conclusion and Outlook

References

7. Integrated Foam-type Electromagnetic Wave Absorption Materials

Qing Chang

7.1 Carbon-based Foam for EMW Absorption

7.1.1 Pure Carbon-based Foams

7.1.2 Composite Foams Formed by Carbon Material

7.1.3 Composite Foams of Carbon Material and Magnetic Metal

7.1.4 Composite Foams of Carbon Material and Metal Oxides

7.1.5 Composite Foams of Carbon Material and Ceramic Materials

7.1.6 Composite Foams of Carbon Material and MXene

7.2 Ferrite-based Foam for EMW Absorption

7.3 SiC-based Foam for EMW Absorption

7.4 Conductive Polymer Composites Foam for EMW Absorption

References

8. Integral Gel Electromagnetic Wave Absorption Materials

Jiaming Wen

8.1 Dielectric Liquid Mediums Gel Electromagnetic Wave Absorption Materials

8.1.1. Progress in the Application and Research of Hydrogel EMW Absorption Materials

8.1.2. Progress in the Application and Research of Ionic and Organic Gel EMW Absorption Materials

8.1.3. Progress in the Research of Poly(Ionic Liquid)s Gel

8.1.4 Perspectives on Dielectric Liquid Medium Gels EMW Absorbing Materials

8.2 Dielectric Solid Medium Gels EMW Absorption Materials

8.2.1 Ceramic-based Aerogels EMW Absorption Materials

8.2.1.1 Preparation Method of Ceramic-based Aerogels EMW Absorbing Materials

8.2.1.2 Ceramic-based Aerogels EMW Absorber Applications and Research Progress

8.2.1.3 Polymer-derived Ceramics Aerogels EMW Absorber Applications and Research Progress

8.2.2 Metal-based Aerogels EMW Absorbing Materials

8.2.2.1 Preparation Method of Metal-based Aerogels Absorbing Materials

8.2.2.2 Metal Aerogels EMW Absorber Applications and Research Progress

8.2.2.3 Composite Metal-based Aerogels EMW Absorber Applications and Research Progress

8.3 Prospect of Integral Gel EMW Absorbing Materials

References

9. Thin Film Electromagnetic Wave Absorption Materials

Bin Shi

9.1 Introduction of Film Materials

9.2 Film Electromagnetic Wave Absorption Materials

9.2.1 Carbon-based Composite Films

9.2.2 Magnetic Metal Films

9.2.3 Thin Film Materials Composite with Metal Oxides.

9.2.4 Mxene Films

9.2.5 Thin Film Material Composite with Sulfide

9.3 The Conclusion and Prospect

References