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:
Feb. 05, 2008
Filed:
Jul. 23, 2004
Cobalt ferrite based magnetostrictive materials for magnetic stress sensor and actuator applications
David C. Jiles, Ames, IA (US);
Jason A. Paulsen, St. Paul, MN (US);
John E. Snyder, Ames, IA (US);
Chester C. H. Lo, Ames, IA (US);
Andrew P. Ring, Ames, IA (US);
Keith A. Bormann, State Center, IA (US);
David C. Jiles, Ames, IA (US);
Jason A. Paulsen, St. Paul, MN (US);
John E. Snyder, Ames, IA (US);
Chester C. H. Lo, Ames, IA (US);
Andrew P. Ring, Ames, IA (US);
Keith A. Bormann, State Center, IA (US);
Iowa State University Research Foundation, Inc., Ames, IA (US);
Abstract
Magnetostrictive material based on cobalt ferrite is described. The cobalt ferrite is substituted with transition metals (such manganese (Mn), chromium (Cr), zinc (Zn) and copper (Cu) or mixtures thereof) by substituting the transition metals for iron or cobalt to form substituted cobalt ferrite that provides mechanical properties that make the substituted cobalt ferrite material effective for use as sensors and actuators. The substitution of transition metals lowers the Curie temperature of the material (as compared to cobalt ferrite) while maintaining a suitable magnetostriction for stress sensing applications.