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:
Dec. 12, 2017
Filed:
Jun. 13, 2014
Center for Abrasives and Refractories Research & Development C.a.r.r.d. Gmbh, Villach, AT;
Jean-Andre Alary, L'Isle sur la Sorgue, FR;
Franz Skale, Villach, AT;
Abstract
Heat treated alumina zirconia abrasive grains based on AlOand ZrOmay be fused in an electric arc furnace, and may have a weight content of: AlObetween 52% and 62% by weight; ZrOand HfObetween 35% and 45% by weight, with at least 6% by weight based on the total weight content of ZrObeing present in the tetragonal and/or cubic high temperature modifications of ZrO; Si-compounds between 0.2% and 0.7% by weight expressed as SiO; carbon between 0.03% and 0.5% by weight; additives between 0.5% and 10% by weight; and raw-material-based impurities of less than 3% by weight. The heat treated alumina zirconia abrasive grains may be heat treated in air between 350° C. and 700° C. for a time period of one to six hours using a rotary kiln.