化学的共沈法並びに熱処理によるSr-Mフェライト微粒子の磁気特性-第3報- Magnetic Properties of Sr-M Ferrite Fine Particles Prepared by Controlling the Chemical Copreciptation Method and Heat Treatment-The Third Report-
The purpose of this experiment is to investigate the effect of the catalytic reaction of NaGl and SrCO<SUB>3</SUB> in the course of formation of the single phase of SrO⋅6Fe<SUB>2</SUB>O<SUB>3</SUB> from the chemical coprecipitated powders( the Fe<SUP>3+</SUP>/Sr<SUP>2+</SUP> ratio is 10.5). The preparation process is as follows ; coprecipitation→boiling→washing→drying→NaCl or SrCO<SUB>3</SUB> addition(0-20 wt%)→heat treatment. The conditions determined as optimum for preparing the fine powders with the best values of σ<SUB>s</SUB>=89.7×10<SUP>-6</SUP> Wb⋅m/kg, H<SUB>cJ</SUB>= 401.8 kA/m and T<SUB>c</SUB>=463°C are as follows : solution composition ; Fe<SUP>3</SUP>+/Sr<SUP>2+</SUP>=10.5 ; pH=13.0 ; NaCl=5wt% addition ; heat treatment ; 1000°C for 2hs in air ; particle size ; 0.2-0.3μm.
粉体および粉末冶金 43(8), 984-989, 1996-08-15
Japan Society of Powder and Powder Metallurgy