Z型マグネトプラムバイトの磁気特性に及ぼすホットプレス及びアンニーリング温度の影響 Effects of Hot-Pressing and Annealing Temperature on the Magnetic Properties of Z Type Magnetoplumbite
The magnetoplumbite ferrite with the composition of 2Co0⋅3Ba<SUB>0.6</SUB>Sr<SUB>0.5</SUB> 0⋅10.8Fe<SUB>2</SUB>O<SUB>3</SUB> was reported to reveal enhanced dispersion frequency.<BR>This paper aims to enhance the dispersion frequency of this ferrite, using calcined powder finerly pulverized. The resonance frequency corresponding to μ″ maximum of the sample hot-pressed at 1110 °C in an oxygen atmosphere extendes to 3.4 GHz, which is almost the vale theoretically predicted, although its permeability is only only 4.4. The resonance frequency decreases and the permeability increases with increasing hot-pressing temperature. Moreover annealing of the hot-pressed sample at higher temperature results in almost the same result.
粉体および粉末冶金 43(10), 1238-1241, 1996-10-15
Japan Society of Powder and Powder Metallurgy