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2報- Magnetic Properties of Sr-M Ferrite Fine Particles Prepared by Controlling the Chemical Coprecipitation Method and Heat Treatment -The Second Report-
This experiment was carried out to investigate the new process of the preparation of fine particles of SrO⋅6Fe<SUB>2</SUB>O<SUB>3</SUB> with single phase by controlling the chemical coprecipitation(a solution containing Fe<SUP>3+</SUP> and Sr<SUP>2+</SUP> in the ratio 10.0-12.0) and succeeding heat treatment. The new process is performed with successive as follows ; coprecipitation→boiling→drying→heat treatment. The conventional process was characterized by the washing after the coprecipitation. The conditions determined as optimum for preparing the fine powders with best values of σ<SUB>s</SUB>= 90.5 × 10<SUP>-6</SUP> Wb⋅m/kg, H<SUB>cJ</SUB>=350.1kA/m, average anisotropy field H<SUB>Aavc</SUB>=915.1 kA/m and T<SUB>c</SUB>= 464°C are as follows: solution composition ; Fe<SUP>3+</SUP>/Sr<SUP>2+</SUP>=10.5 ; pH=13.0 ; heat treatment ; 1000°C for 2hs in air.
粉体および粉末冶金 43(1), 13-18, 1996-01-15
Japan Society of Powder and Powder Metallurgy