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, 2009
Filed:
Mar. 31, 2006
Dan Goia, Potsdam, NY (US);
Bernd Kempf, Kleinwallstadt, DE;
Inge Fallheier, Linsengericht, DE;
Roger Wolmer, Hanau Groβauheim, DE;
Andreas Koffler, Nidderau, DE;
Dan Goia, Potsdam, NY (US);
Bernd Kempf, Kleinwallstadt, DE;
Inge Fallheier, Linsengericht, DE;
Roger Wolmer, Hanau Groβauheim, DE;
Andreas Koffler, Nidderau, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
The present invention relates to a method for manufacture of silver-based composite powders for electrical contact materials. The invention relates also to electrical contact materials made from such composite powders. The process comprises a high energy dispersing process of wet silver oxide (AgO) with additional second oxide components in aqueous suspension. The high energy dispersing process can be conducted by high shear mixing or by high energy milling. Preferably high speed dispersing units working at rotating speeds in the range of 5,000 to 30,000 rpm or high energy mills such as attritor mills are used. The new process is versatile, economical and offers access to a broad spectrum of contact materials. The silver-based composite powders made according to the new process yield contact materials with a highly dispersed microstructures and superior material characteristics.