Magnetic properties of Ba-Zn-system W-type hexagonal ferrite magnets

Journal Article · Mon Nov 01 04:00:00 EST 1993 · IEEE Translation Journal on Magnetics in Japan (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/TJMJ.1993.4565742· OSTI ID:7274337

Yamamoto, H; Ishii, A ^[1]

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1. Meiji Univ. (Japan)

Ba-Zn system W-type hexagonal ferrite magnets were prepared by a new manufacturing method in which BaO was added after semisintering treatment, and without atmosphere control. This process was found to be very useful in stabilizing the W-type hexagonal structure. The optimum conditions for making magnets, and some properties of typical specimens, are as follows: chemical analysis Ba[sub 1.092]Zn[sub 1.725]-Fe[sub 0.410][sup 2+]Fe[sub 15.848][sup 3+]O[sub 27]; semisintering conditions 1,275 C [times] 1.0 hr in air; sintering conditions 1,225 C [times] 0.5 hr in air; magnetic and physical properties J[sub m] = 0.405 T, J[sub r] = 0.364 T, H[sub cJ] = 86.0 kA/m, H[sub cB] = 82.0 kA/m, (BH)[sub max] = 18.5 kJ/m[sup 3], T[sub c] = 330 C, H[sub A] = 987.0 kA/m, K[sub A]=1.87 [times] 10[sup 5]J/m[sup 3], and n[sub B] = 33.7[mu][sub B].

• OSTI ID: 7274337
• Journal Information: IEEE Translation Journal on Magnetics in Japan (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Translation Journal on Magnetics in Japan (Institute of Electrical and Electronics Engineers); (United States) Vol. 8:11; ISSN ITJJER; ISSN 0882-4959
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CRYSTAL STRUCTURE
DATA
EXPERIMENTAL DATA
FABRICATION
INFORMATION
IRON COMPOUNDS
IRON OXIDES
MAGNETIC PROPERTIES
MAGNETS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SINTERING
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ZINC COMPOUNDS
ZINC OXIDES