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Formation Mechanism of Y-type Barium Ferrite Prepared by the Glass-ceramic Method
Hori Chinatsu,Miki Hiroki,Nagae Masahiro,Yoshio Tetsuo 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Y-type barium ferrite was prepared by the glass-ceramic method. Glasses with composition of were prepared, and the precipitation behavior of Y-type ferrite from the glass matrix was investigated by heating glass specimens at various temperature. which is a precursor of M-type ferrite was precipitated at about 813 K and an unknown compound, phase X, was precipitated at about 850 K. M-type ferrite and Y-type ferrite started to form at about 923 K and 1103 K, respectively. The formation of Y-type ferrite was int erpreted as the result of the reaction of M-type ferrite with a melt of phase X.
Miki Hiroki,Hori Chinatsu,Nagae Masahiro,Yoshio Tetsuo 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Y-type barium ferrite ( Me=Zn, Co, Cu) expected as an electromagnetic wave absorber were prepared by the glass-ceramic method. The glasses with composition of were prepared. Single-phase powders of Y type barium ferrite were obtained with the composition . The shape of Y-type crystals depended strongly on the heating temperature and changed from a plate-like hexagon to a complex polyhedron with increasing heating temperature. Correlation was recognized between saturation magnetization and crystal shape. Electromagnetic wave absorption characteristics was affected by the saturation magnetization and crystal shape.