Title :
Structural and magnetic properties of BaFe12-2xCox TixO19 powders prepared by the glass crystallization method
Author :
Gornert, P. ; Sinn, E. ; Schuppel, W. ; Pfeiffer, H. ; Rosler, Marko ; Schubert, Th ; Jurisch, M. ; Sellger, R.
Author_Institution :
PTI, Jena, East Germany
fDate :
1/1/1990 12:00:00 AM
Abstract :
The glass crystallization method is shown to be suitable for preparing BaFe12-2xCoxTixO19 powders with a nearly perfect crystallographic structure and a narrow particle size distribution. The dependences of the specific magnetization, the coercivity, and the particle size distribution on both the annealing temperature and the Co-Ti content correlate in a characteristic way. Furthermore, the lattice parameters, the specific surfaces and the thickness of the effective nonmagnetic surface layer were determined. The coercivity of the hexaferrite magnetic tapes is more than 8×103 A/m higher than for the corresponding powders
Keywords :
annealing; barium compounds; ceramics; coercive force; ferrites; magnetic properties of fine particles; magnetic tapes; magnetisation; particle size; powder technology; BaFe12-2xCoxTixO19 powders; BaFe12O19:Co,Ti; Co-Ti content; annealing temperature; coercivity; effective nonmagnetic surface layer; glass crystallization method; hexaferrite magnetic tapes; lattice parameters; magnetic properties; narrow particle size distribution; specific magnetization; specific surfaces; structural properties; thickness; Annealing; Coercive force; Crystallization; Crystallography; Glass; Magnetic properties; Magnetization; Powders; Temperature dependence; Temperature distribution;
Journal_Title :
Magnetics, IEEE Transactions on
