Patent
Ferrite and ferrite core for power supply
TLDR
In this paper, the authors proposed a method to cut power loss in a highfrequency region by a method wherein specific amounts of silicon oxide, calcium oxide, tin oxide and/or titanium oxide, niobium oxide, zirconium oxide are contained in the material of ferrite.Abstract:
PURPOSE: To cut down power loss in a high-frequency region by a method wherein specific amounts of silicon oxide, calcium oxide, tin oxide and/or titanium oxide, niobium oxide. zirconium oxide are contained in the material of ferrite. CONSTITUTION: As for the main components, mangenese oxide, zinc oxide and iron oxide are contained and as for the sub components, silicon oxide, calcium oxide, tin oxide and/or titanium oxide, niobium oxide and zirconium oxide are contained. At this tiem, the contents of mangnese oxide in the main contents is 30-41mol% in terms of MnO, 6-16mol% of zinc oxide in terms of ZnO. On the other hand, the weight ratio of the sub components to the main components is 50-250-ppm of silicon oxide in terms of SiO 2 , 200-1500ppm of calcium oxide in terms of CaO, not exceeding 4000ppm of tin oxide in terms of SnO 2 , not exceeding 3000ppm of titanium oxide in terms of TiO 2 and the total of the tin oxide and titanium oxide exceeds 3000ppm. COPYRIGHT: (C)1995,JPOread more
Citations
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Patent
BALUN transformer core material, BALUN transformer core and BALUN transformer
Masahiro Onizuka,Kouki Sato +1 more
TL;DR: A BALUN transformer core material contains a Z-type hexagonal system ferrite having an in-plane anisotropy and a high magnetic permeability and such a high resonance frequency as to be in excess of a Snake's limiting line as mentioned in this paper.
Patent
Manganese-zinc system ferrite
TL;DR: The manganese-zinc system ferrite of the invention has an initial permeability μi at a frequency of 100 kHz and at 25° C. of 5,000 or more.
Patent
Mn-Zn ferrite
TL;DR: In this article, the authors proposed a Mn-Zn ferrite having high electrical resistance and exhibiting sufficient durability even when it is used in a high frequency region over 1 MHz, which has been previously estimated, even at the time of firing at a low temp. in the atmosphere.
Patent
Mnzn ferrite and magnetic core for transformer
TL;DR: In this paper, a MnZn ferrite having excellent characteristics of an incremental permeability µΔ value of 250 or greater in a wide temperature range of 0 to 85°C and an incremental percolation value of 400 or greater at 65°C when an 80 A/m direct current magnetic field is applied is provided.
Patent
Mn-Zn ferrite and coil component with magnetic core made of same
TL;DR: In this article, a Mn-Zn ferrite and a coil component are provided which obtains a low core loss in a frequency band above 1 MHz and even above 5 MHz and which can duly function in such a high frequency band.
References
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Patent
Low power loss Mn-Zn ferrites
Masakatsu C,O Kawasaki Steel Corp. Yamazaki,Tetsu C,O Kawasaki Steel Corp. Narutani,Hideaki C,O Kawasaki Steel Corp. Kobiki +5 more
TL;DR: A low power loss Mn-Zn ferrite consists essentially of Fe₂O₃, MnO and ZnO at a given mole ratio and contains given amounts of SiO, CaO, niobium oxide and titanium oxide or antimony oxide as trace additives as mentioned in this paper.
Patent
Ferrite and magnetic core for power source
Takeda Osamu,Inoue Masashi +1 more
TL;DR: In this article, the difference between the maximum magnetic flux density and residual magnetic density in a high frequency state is made larger using specific manganese-zinc ferrite material.
Patent
Low-loss ferrite
Gen Fukushima,Norio Sasaki +1 more
TL;DR: In this paper, a magnetic material having low loss, in particular, in the high-frequency regions above 100kHz can be obtained by using Fe 2 O 3, ZnO, MnO, and additives of 0.08 to 0.40mole% CaO, 0.05 to 1.
Patent
Production of ferrite of mn-zn system
TL;DR: In this article, the authors used MnO.OH as a MnO source to improve the magnetic loss characteristics of the Mn-Zn system, and the results showed that the resulting ferrite has smaller loss than one using MnCO3 as a source and improved magnetic characteristics.
Patent
Mn-zn ferrite
TL;DR: In this paper, the composition ratio of the main components of the Mn-Zn base ferrite is limited to the following range. But, the authors do not specify the sub-components.