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. 11, 1992
Filed:
Jul. 25, 1991
Applicant:
Inventors:
Joachim Wecker, Erlangen, DE;
Ludwig Schultz, Bubenreuth, DE;
Matthias Katter, Dechsendorf, DE;
Kurt Schnitzke, Neunkirchen A Brand, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
148103 ; 148104 ; 419 13 ; 419 29 ; 419 53 ;
Abstract
Magnet material of the Sm-Fe-N system having a crystalline, hard magentic phase with a Th.sub.2 Zn.sub.17 crystal structure, wherein N atoms are incorporated into the crystal lattice, is produced. First a preliminary product is formed by sintering a Sm-Fe powder which is oriented in a magnetic field to provide a sintered body having a two-component Sm-Fe phase. The sintered body is heat treated in a nitrogen atmosphere to form the Sm-Fe-N hard magnetic phase. The nitrogen atomosphere may advantageously be reactive nitrogen.