EP0434669A2
Expired / Lapsed
EP
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Method of making a coated magnetic powder and a compressed magnetic powder core
Assignee: Toshiba Corp
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Filing: 1985-09-26
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Granted: —
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Expires: 2005-09-26
Abstract
Abstract A compressed magnetic powder core comprising a compressed body of a magnetic powder and electrically insulating material separating the magnetic powder particles, characterized in that the magnetic powder has an average particle size of 10 to 300 mu m, and the insulating material covers each of the particles of said magnetic powder and comprises a continuous insulating film having a thickness of 10 mu m or less and comprising a metal alkoxide or a decomposition product thereof. <IMAGE>
Inventors
- 👤 Kumi C/O Patent Division Ochiai
- 👤 Hiromichi C/O Patent Division Horie
- 👤 Itsuo C/O Patent Division Arima
- 👤 Mikio C/O Patent Division Morita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 17:48
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/22; H01F1/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A compressed magnetic powder core comprising a compressed body of a magnetic powder and electrically insulating material separating the magnetic powder particles, characterized in that the magnetic powder has an average particle size of 10 to 300 pm, and the insulating material covers each of the particles of said magnetic powder and comprises a continuous insulating film having a thickness of 10 pm or less and comprising a metal alkoxide or a decomposition product thereof.
Claim 2
Dependent Claim
75 words
A compressed magnetic powder core comprising a compressed body of a magnetic powder and electrically insulating material separating the magnetic powder particles, characterized in that the magnetic powder has an average particle size of 10 to 300 pm, and the insulating material covers each of the particles of said magnetic powder and comprises a continuous insulating film having a thickness of 10 pm or less and comprising a metal alkoxide or a decomposition product thereof.
Claim 3
Dependent Claim
17 words
A core according to Claim 1, characterized in that the magnetic powder comprises an iron-based magnetic material.
Claim 4
Dependent Claim
22 words
A core according to Claim 1 or 2, characterized in that the decomposition product includes a metal oxide and/or a metal hydroxide.
Claim 5
Dependent Claim
25 words
A core according to claim 1, 2 or 3, characterized in that the metal alkoxide has an alkyl group having 1 to 5 carbon atoms.
Claim 6
Dependent Claim
60 words
A core according to claim 4, characterized in that the metal alkoxide is selected from the group consisting of alkoxides of lithium, sodium, potassium, beryllium, magnesium, calcium, strontium, barium, titanium, zirconium, niobium, tantalum, manganese, iron, cobalt, copper, zinc, cadium, aluminum, gallium, indium, silicon, germanium, tin, lead, arsenic, bismuth, tellurium, yttrium, lanthanum, neodynium, samarium, europium and gadolinium, and a mixture thereof.
References Cited (Backward Citations)
No citation records indexed.
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