The Invention of Ferrites and Their Contribution to the Miniaturization of Radios
@article{Okamoto2009TheIO, title={The Invention of Ferrites and Their Contribution to the Miniaturization of Radios}, author={Akira Okamoto}, journal={2009 IEEE Globecom Workshops}, year={2009}, pages={1-6} }
Dr. Takeshi Takei, the professor at Tokyo Institute of Technology, discovered that oxides containing zinc and iron have distinguished magnetic properties. In 1930, Prof. Kato and Prof. Takei applied a patent for their discovery of oxide magnetic core materials, which was granted in 1932 in Japan. Tokyo Denki Kagaku Kogyo (now TDK Corporation) was founded in 1935 to commercialize this newly invented ferrite cores as a venture company originated from the university patent of ferrite TDK started…
17 Citations
Morphological, Raman, electrical and dielectric properties of rare earth doped X-type hexagonal ferrites
- Materials Science
- 2016
Ferrite Materials and Applications
- PhysicsElectromagnetic Materials and Devices
- 2020
This chapter starts from a generalized permeability and aims at providing a better understanding of the ferrites behavior in the microwave fields. The formula of the generalized permeability explains…
Modeling and Simulation of Thermomagnetic Materials for Thermally Actuated Magnetization Flux Pumping Method
- PhysicsIEEE Transactions on Applied Superconductivity
- 2016
The potential of bulk high-temperature superconductors to carry high current densities and trap significant magnetic fields at cryogenic temperatures makes them particularly attractive for a variety…
Preparation and study of the physical properties of the ferrite compound Al1- xZnxFe2O4 using sol gel method
- Materials ScienceJOURNAL OF XI'AN UNIVERSITY OF ARCHITECTURE & TECHNOLOGY
- 2020
In this research, we will prepare spinel ferrite (Zinc ferrite) by (Sol-Gel) a method, then we will depose it with Trivalent elements Aluminum, with a ratio of (x = 0, 0.5, 0.7, 1.0) to be with…
High Technology Applications of Barium and Strontium Ferrite Magnets
- Materials Science
- 2016
Ceramic magnets as barium ferrite or strontium ferrite have many applications in high technology. One of the reasons is the low cost when compared to competitor materials, as Alnico, MnBi, MnAl or…
Progress and prospects of hard hexaferrites for permanent magnet applications
- Materials Science
- 2020
Permanent magnets based on hard hexaferrite represent the largest family of magnets being used today by volume. They generate moderate remanence induction, but present crucial advantages in terms of…
Soft Magnetic Materials
- Materials ScienceReference Module in Materials Science and Materials Engineering
- 2020
Influence of Mg concentration on physico-chemical properties of Cd ferrites (CdMg1.5xFe2−xO4) synthesized by sol–gel combustion method
- Materials Science
- 2015
Synthesis and Characterization of Cobalt Substituted NaZnFe2O4 by Sol-Gel Method
- Materials Science
- 2019
The samples of NaCo0.11Zn0.39Fe2O4 and NaCo0.24Zn0.26Fe2O4 were synthesized by sol-gel method. The structural characterizations of these samples were performed by X-ray diffraction (XRD), Scanning…
Magnetic augmented rotation system (MARS) - properties and performance
- Engineering, Physics
- 2016
MAGNETIC AUGMENTED ROTATION SYSTEM (MARS) PROPERTIES AND PERFORMANCE by Ruolei Liu Magnetic Augmented Rotation System (MARS) is proposed as a system for conversion of mechanical energy into…
References
SHOWING 1-4 OF 4 REFERENCES
Studies on Zinc Ferrite. Its Formation, Composition, and Chemical and Magnetic Properties
- Chemistry
- 1930
Studies on the Adoption of Intermediate Frequency Band - pass Filter with Replace Mechanism ”
- Technical J . of Kokusai Denki Tsushin
Intermediate Frequency Transformer with Magnetic Core ”
- Radio Japan
- 1940
Production method of magnetic core mainly made of metal oxides ” [ 5 ] “ Evaluation Report of Ferrite Cores for RF Inductor Application ”
- Studies on Zinc Ferrite . Its Formation , Composition , and Chemical and Magnetic Properties ”
- 1930