Introduction to Hard Ferrites

Name: Introduction to Hard Ferrites | From Fundamentals to Practical Applications
Brand: Materials Research Forum LLC
Price: 112.99 EUR
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From Fundamentals to Practical Applications

G. Kumar(Editor)

Materials Research Forum LLC (Publisher)

Published on 5. March 2023

218 pages

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978-1-64490-231-8 (ISBN)

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Content

Intro
front-matter
Table of Contents
Preface
1
An Overview of Hard Ferrites: Types and Structures
1. Introduction
2. Classification and characteristics of hexaferrites
2.1 M-type hexaferrite
2.2 Z-type hexaferrite
2.3 Y-type hexaferrite
2.4 W-type hexaferrite
2.5 X-type hexaferrite
2.6 U-type hexaferrite
3. A brief description of the solid-state chemistry of hexaferrites
4. Approaches for better understanding of crystal structure of hexaferrites
4.1 Spinel based model
4.2 S/R/T blocks based model
5. Crystal structure of hexaferrites
5.1 M-type hexaferrite
5.2 W-type hexaferrite
5.3 X-type hexaferrite
5.4 Y-type hexaferrite
5.5 Z-type hexaferrite
5.6 U-type hexaferrite
6. Applications of hexaferrites
Concluding Remarks
References
2
Recent Advances in Processing of Hard Ferrites
1. Introduction
2. Fabrication of hard ferrites nanoparticles
2.1 Dry synthesis methods
2.1.1 Combustion method
2.1.2 Solid-state method
2.2 Wet synthesis method
2.2.1 Co-precipitation method
2.2.2 Sol-gel method
2.2.3 Spray pyrolysis method
2.2.4 Microwave-assisted combustion method
2.2.5 Microemulsion method
2.2.6 Citrate precursor method
2.2.7 Thermal decomposition method
2.2.8 Hydrothermal method
2.2.9 Reverse micelle method
2.2.10 Polyol method
2.2.11 Spray drying method
2.2.12 Sonochemical method
3. Comparision of synthesis methodologies
Conclusion
References
3
Effect of Substitution on the Dielectric and Magnetic Properties of BaFe12O19
1. Introduction
1.1 Magnetic properties and morphology of copper-substituted barium hexaferrites
1.2 Effect of Co-Ti substitution on magnetic properties of nanocrystalline BaFe12O19
1.3 Effect of rare-earth materials substitution on the micro structural and magnetic properties of BaFe12O19
1.4 The effect of Nb substitution on magnetic properties of BaFe12O19 nano hexaferrites
1.5 Magnetic properties of Cu and Al doped nano BaFe12O19
Conclusion
References
4
Effect of Substitution on the Electric and Magnetic Properties of SrFe12O19 Hexa Hard Ferrites
1. Introduction
2. Synthesis technique for hexagonal hard ferrites
2.1 Standard ceramic techniques
2.2 Co-precipitation
2.3 Sol-Gel
3. Magnetism in hexagonal ferrites
4. Summary of hexagonal ferrites magnetic properties
5. Strontium hexa ferrites (SrM)
6. Effect of substitution on magnetic properties of SrFe12O19 hexa hard ferrite
6.1 Substituted strontium hexaferrite (SrM)
6.2 Magnetic properties
7. Magneto-dielectric properties
7.1 Dielectric properties
7.2 Magneto dielectric properties
8. Applications of hexagonal hard ferrites
8.1 Advanced ceramic materials for microwave and millimeter wave engineering
Conclusion
Future outlook
References
5
Hard Ferrites for Permanent Magnets
1. Introduction
2. Structure, properties, and characteristics of hard ferrites
3. Generation of commerciallyavailable permanent magnets
3.1 Carbon steel magnets
3.2 Alcino magnets
3.3 Sm-Co magnets
3.4 Nd-Fe-B magnets
3.5 Hexaferrite/ferrite based magnets
4. Tasks for improving the hard ferrite-based magnets
5. Parameters responsible for improving the performance of the hard ferrites for their utilization in permanent magnets application
5.1 Influence of size at the nanoscale
5.2 Influence of the shape (Morphology)
5.3 Fabrication techniques for the preparation of hard ferrite-based nanomaterials
5.3.1 One dimensional nanostructure
5.4 Controlling substitution in the structure of hard ferrites
5.4.1 Enhancing magnetization (Ms) by substitution
5.4.2 Doing substitution in hexaferrites with large anisotropy and coercive field
Concluding remarks
References
6
Hard Ferrites for High Frequency Antenna Applications
1. Introduction
1.1 Ferrites for antenna application
2. Synthesis of hard ferries for antenna applications
2.1 Various synthesis methods
2.1.1 Ceramic powder milling method
2.1.2 Reaction in solid state method
2.1.3 Chemical coprecipitation method
2.1.4 Sol gel synthesis method
2.1.5 Temperature specific combustion synthesis
2.1.6 Hydrothermal synthesis method
2.1.7 Wet chemical method
2.1.8 Microemulsions method
3. Different compositions of hard ferrites for antenna applications
4. Factors affecting the performance of antenna
4.1 Size
4.2 Losses in dielectric material
4.3 The loss in propagation
4.4 Return loss
4.5 Radiation efficiency
5. Artificial materials to improve efficiency
5.1 Use of substrate integrated waveguide (SIW) to reduce loss
6. Future prospects of antenna
Conclusion
References
7
Applications of Hard Ferrites in Memory Devices
1. Introduction
2. Classification of ferrites
2.1 Spinel ferrites
2.2 Garnet ferrites
2.3 Ortho ferrites
2.4 Hexagonal ferrites
3. Preparation methods for ferrites
4. Hard ferrites
4.1 Application of hard ferrites
4.1.1 Inductors
4.1.2 Power
4.1.3 EMI shielding
5. Hard ferrites for memory devices
5.1 Multiple state memory devices
5.2 Magnetic core memory
Conclusion
Acknowledgement
References
back-matter
Keyword Index
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