【摘要】 采用化学共沉与高温助熔相结合的工艺制备了 W 型六角晶系铁氧体—Ba(Zn_1-xCO_x)₂Fe₁₆O₂₇。对不同烧结温度,其物相组成的变化,比饱和磁化强度σ、磁晶各向异性场 H_A^θ随 Co²⁺取代值 x 的变化以及晶粒形貌进行了测试和分析。结果表明:在烧结温度1250℃,保温0.5h 的条件下,测得纯相 W 型材料;当 x=0.45左右时,Ba(Zn_1-xCo_x)₂Fe₁₆O₂₇的磁矩从优方向由单轴过渡到平面。更多还原

【Abstract】 W type hexaferrites Ba(Zn_1-xCo_x)₂Fe₁₆O₂₇ are prepared with the methodof coprecipition combined with high temperature melting.The relative amounts of the vari-ous phases present in samples subjected to different heat treatment,saturationmagnetization σ_s and crystalline anisotropy field H_A^θ veraus Co²⁺ substitutionx,and alsopowder morphology are measured and discussed in detail.The results indicate that pure(Zn_1+xCo_x)₂—W hexaferrites are prepared at heating temperature 1250 ℃ for 0.5 hour inair and the crystalline anisotropic preferable direction changes from uniaxiality to plane atX=0.45.更多还原