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:
Nov. 24, 2015
Filed:
Dec. 21, 2010
Henri Bocciarelli, Pernes les Fontaines, FR;
Nabil Nahas, Serris, FR;
Henri Bocciarelli, Pernes les Fontaines, FR;
Nabil Nahas, Serris, FR;
SAINT-GOBAIN CENTRE DE RECHERCHES ET D'ETUDES EUROPEEN, Courbevoie, FR;
Abstract
The invention relates to a granulated powder intended, in particular, for the production of ceramic sintered parts, said powder having the following chemical weight composition, based on dry matter, namely: a zirconia stabiliser selected from the group containing YO, ScO, MgO, CaO, CeO, and mixtures thereof, the weight content of stabiliser, based on the total zirconia and stabiliser content, being between 2% and 20% and the MgO+CaO content being less than 5% based on the total zirconia and stabiliser content; at least 1% of a first binder having a glass transition temperature less than or equal to 25° C.; 0-4% of an additional binder having a glass transition temperature greater than 25° C.; 5-50% alumina; 0-4% of a temporary additive different from the first binder and the additional binder, the total content of the first binder, the additional binder and the temporary additive being less than 9%; less than 2% impurities; and ZrOto make up 100%. According to the invention, the median diameter Dof the powder is between 80 and 130 μm, the percentile Dis less than 500 μm and the relative density of the granules is between 30% and 60%.