BaMn_(0.5)Co_(0.5)Zr_(1.0)Fe_(10)O_(19)软磁陶瓷的微观形貌和磁性研究  

Fabrication and magnetic properties studies of BaMn_(0. 5)Co_(0. 5)Zr_(1. 0)Fe_(10)O_(19) ceramics

作　　者：任勇[1] 吕世雅[1] 徐光亮[1] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地,四川绵阳621010

出　　处：《功能材料》2014年第11期11056-11060,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(11304256);四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地开放基金资助项目(12zxfk08)

摘　　要：用溶胶-凝胶法制备了Mn-Co-Zr离子共掺BaFe12O19的前驱体,经过后期烧结得到BaMn0.5Co0.5Zr1.0Fe10O19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1 000℃,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. 5Co0. 5Zr1. 0Fe10O19was smaller with bigger Ms. The BaM ferrite ceramics has the best properties with presintering tempareture of1 000 ℃ after 8 h of milling,furthermore,coercivity of BaMn0. 5Co0. 5Zr1. 0Fe10O19was only 5. 01 kA /m and saturation magnetization was 59 A·m2/kg after presintering treatment at 1 100 ℃. With Mn-Co-Zr substitutions,Msdid not decrease and Hcdecrease rapidly. Meanwhile,Mn-Co-Zr ion doping makes grain of product refinement,activity increase.

关 键 词：溶胶-凝胶 M型钡铁氧体 磁性能 

分 类 号：TQ174.1[化学工程—陶瓷工业]