The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2023
Filed:
Mar. 24, 2021
Nippon Aerosil Co., Ltd., Tokyo, JP;
Masao Aoki, Mie, JP;
NIPPON AEROSIL CO., LTD., Tokyo, JP;
Abstract
An insulating filler composed of a mixed powder in which a hydrophobic fumed oxide powder having an average primary particle size D, which is smaller than an average primary particle size D, is adhered to the surface of a magnesium oxide powder and/or a nitride-based inorganic powder having the average primary particle size D, wherein: the ratio D/Dof the average primary particle size Dto the average primary particle size Dis 6×10to 3×10; the volume resistivity of the mixed powder is 1×10Ω·m or more; and the content ratio of the hydrophobic fumed oxide powder in the mixed powder is 5-30 mass %. Also provided is an insulating material in which the above-mentioned insulating filler is contained in a resin molded body.