Title:
SPECIALTY MATERIALS PROCESSING TECHNIQUES FOR ENHANCED RESONANT FREQUENCY HEXAFERRITE MATERIALS FOR ANTENNA APPLICATIONS AND OTHER ELECTRONIC DEVICES
Document Type and Number:
WIPO Patent Application WO/2012/103020
Kind Code:
A3
Abstract:
Processing techniques for forming a textured hexagonal ferrite materials such as Z-phase barium cobalt ferrite Ba3Co2Fe24O41 (Co2Z) to enhance the resonant frequency and other magnetic properties of the material for high frequency applications are provided. The processing techniques include magnetic texturing by using fine grain particles and sintering the material at a lower temperature than conventional firing temperatures to inhibit reduction of iron. The processing techniques also may include aligning M-phase (BaFe12O19 uniaxial magnetization) with non-magnetic additives in a static magnetic field and reacting with BaO source and CoO to form Z-phase (Ba3Me2Fe24O42). In some implementations, processing techniques includes aligning Co2Z phase (planar magnetization) with magnetic texturing occurring in a rotating magnetic field.
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Inventors:
HILL MICHAEL D (US)
Application Number:
PCT/US2012/022241
Publication Date:
November 08, 2012
Filing Date:
January 23, 2012
Export Citation:
Assignee:
SKYWORKS SOLUTIONS INC (US)
HILL MICHAEL D (US)
HILL MICHAEL D (US)
International Classes:
H01F1/34; C04B35/26; H01Q7/08
Foreign References:
| US20090297432A1 | 2009-12-03 | |||
| US20070138432A1 | 2007-06-21 | |||
| US20080101979A1 | 2008-05-01 | |||
| JP2003221232A | 2003-08-05 |
Attorney, Agent or Firm:
KING, John, R. (LLP2040 Main Street,Fourteenth Floo, Irvine CA, US)
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