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:
Jul. 28, 1981
Filed:
Jul. 27, 1979
Thomson-CSF, Paris, FR;
Abstract
A mixture of oxides or salts of barium, titanium and tin (principal materials) are initially ground with two different classes of dopants. The first class consists of oxides or salts of rare earths or of elements such as antimony. The second class consists of oxides or salts of elements such as manganese or copper. After calcining and sintering, cooling of the ceramic body is obtained by adjusting to a very low rate (negative gradient of 10 to 30.degree. C. per hour) in a pure oxygen atmosphere. The material is primarily suited for use in capacitors having one or a number of layers which may be separated by electrodes inserted prior to sintering. The material has high apparent permittivity and can be employed at much higher voltages than in barrier-layer capacitors.