JP2632527B

PURPOSE:To obtain the cap core with a screw, to be used for a distribution line filter, having excellent machinability and a small high frequency loss at a low cost by a method wherein a screw is formed on the sintered body consisting of the compositional ratio of Fe2O3 and ZnO within the specifical...

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Bibliographic Details
Main Authors SHOJI MAKOTO, KUMAGAI MOTOI, IKEDA TAKEYOSHI
Format Patent
LanguageEnglish
Published 23.07.1997
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:PURPOSE:To obtain the cap core with a screw, to be used for a distribution line filter, having excellent machinability and a small high frequency loss at a low cost by a method wherein a screw is formed on the sintered body consisting of the compositional ratio of Fe2O3 and ZnO within the specifically prescribed range. CONSTITUTION:The subject cap core, which is formed by providing a screw on the sintered body consisting of the composition within the range of 30-52mol% for Fe2O3, 1-12mol% for CuO, and 36-69mol% for ZnO, is used. For example, the ZnO ferrite consisting of 42.5mol% Fe2O3, 57.5mol% ZnO, CuO is replaced with ZnO within the limit of 1-12mol%, ferrite is formed using the ordinary method, and it is pulverized. Subsequently, a PVA is added, a granulating operation is conducted, and after a pressure-molding work has been performed, a sintering work is conducted at 1250 deg.C in the air, and a sintered body is obtained. The surface of said sintered body is ground using a grindstone, a thread is cut, and a threaded cap core is obtained.
Bibliography:Application Number: JP19880022909