掺CaO-B_2O_3-SiO_2玻璃烧结制备MnZn铁氧体及其磁性能  

Preparation and Magnetic Properties of Sintered MnZn Ferrites Doped with CaO-B_2O_3-SiO_2 Glass

作　　者：徐光亮[1,2] 卢超[1,2] 刘桂香[1,2] 曾丽文[1,2] 余洪滔[1,2] 陈劲松[3] 

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,绵阳621010 [2]西南科技大学新材料研究所,材料科学与工程学院,绵阳621010 [3]西南应用磁学研究所,绵阳621000

出　　处：《功能材料与器件学报》2011年第3期307-312,共6页Journal of Functional Materials and Devices

基　　金：四川省教育厅重点项目(08ZA009);西南科技大学博士基金资助项目(08zx0102)

摘　　要：采用传统陶瓷工艺制备了CaO-B2O3-SiO2(CBS)玻璃掺杂的MnZn铁氧体。研究了CBS玻璃掺入量及烧结温度对MnZn铁氧体的烧结特性及磁性能的影响。结果表明:样品的密度随着CBS掺入量的增加而不断减小,磁性能随着温度的升高而不断增强;掺入适量CBS可在烧结时形成液相,使固体颗粒间产生液相烧结并促进晶粒的长大。与未掺杂CBS的样品相比,掺杂1%CBS(质量分数)的样品其初始磁导率(μi)、饱和磁感应强度(Bs)均呈增大的趋势,同时矫顽力(Hc)减小;继续增大CBS掺入量,铁氧体的磁性能则随之下降。掺入1%CBS、1310℃烧结3h获得的MnZn铁氧体具有最佳的综合磁性能:μi=271,Bs=416mT,Hc=76.5A/m。MnZn ferrites doped with CaO-B2O3-SiO2（CBS） glass were prepared by traditional ceramic technique.The effects of CBS glass doping amounts and sintering temperature on the sintering behavior and the magnetic properties of MnZn ferrites were investigated.The experimental results indicate that the density of samples becomes smaller as the CBS doping amounts increasing,and the magnetic properties of samples increase as the sintering temperature increasing.Liquid phase appears when doping appropriate amount of CBS,which can generate liquid sintering among solid particles and promote the growth of grains.Compared with the sintered products without CBS,the initial permeability（μi） and the saturation magnetic induction（Bs） of the samples doped with 1%（mass fraction） CBS both increase,and the coercive force（Hc） decreases.However,the magnetic properties of ferrites decline when continuing to increase the CBS doping amounts.MnZn ferrite doped with 1% CBS glass sintered at 1310℃ for 3h obtained the optimum comprehensive magnetic properties：μi=271,Bs=416mT,Hc=76.5A/m.

关 键 词：MNZN铁氧体 CaO-B2O3-SiO2玻璃 掺杂 烧结 磁性能 

分 类 号：TM277[一般工业技术—材料科学与工程] O737[电气工程—电工理论与新技术]