用溶胶-凝胶法制备了 Mn-Co-Zr 离子共掺BaFe12 O19的前驱体,经过后期烧结得到 BaMn0．5 Co0．5 Zr1．0 Fe10 O19陶瓷,研究了烧结温度、预烧温度、球磨时间等对陶瓷微观形貌和磁性的影响.通过 XRD、SEM和VSM等对样品进行性能表征,发现相比于纯 M型钡铁氧体,掺杂M型钡铁氧体在相同烧结温度和预烧温度情况下,晶粒更细,而且饱和磁化强度更大.当预烧温度为1000℃,球磨时间8 h,BaM铁氧体陶瓷的致密度、晶粒形貌和磁性能最佳,此时陶瓷饱和磁化强度为59 A?m2/kg,矫顽力5．01 kA/m,密度为4．73 g/cm3,满足在高频领域的应用.可见 Mn-Co-Zr离子掺杂对M型钡铁氧体陶瓷的软磁化及其应用有决定性影响,同时掺杂使得产物颗粒粉体晶粒细化,活性增加.
Mn-Co-Zr substituted BaM ferrite particles were prepared by the sol-gel method,the influence of heat treatment temperature,milling time on microstructure and magnetic properties were studied.Phase structure and microscope image of sample were investigated by X-ray diffraction and scanning electron microscopy,its static magnetic properties was studied by a vibrating sample magnetometer.Compared with BaM ferrite,the crystalline particle of BaMn0.5 Co0.5 Zr1.0 Fe10 O19 was smaller with bigger Ms .The BaM ferrite ceramics has the best properties with presintering tempareture of 1 000 ℃ after 8 h of milling,furthermore,coercivity of BaMn0.5 Co0.5 Zr1.0 Fe10 O19 was only 5.01 kA/m and saturation magnetization was 59 A??m2/kg after presintering treat-ment at 1 100 ℃.With Mn-Co-Zr substitutions,Ms did not decrease and Hc decrease rapidly.Meanwhile,Mn-Co-Zr ion doping makes grain of product refinement,activity increase.
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