Cu^(2+)掺杂对M型钡铁氧体烧结行为和磁性能的影响  

Influence of Cu^(2+)Doping on the Sintering Behavior and Magnetic Property of M-type Barium Ferrite

作　　者：冯志[1] 徐光亮[1] 余洪滔[1] 王霖[1] 程艳奎[1] 

机构地区：[1]西南科技大学新材料研究所,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

出　　处：《人工晶体学报》2014年第1期168-172,179,共6页Journal of Synthetic Crystals

基　　金：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(11zxfk24)

摘　　要：采用共沉淀-熔盐法制备了化学式为BaCuxFe12-xO19-δ(x=0.0、0.2、0.4、0.6)的M型钡铁氧体(BaM),研究了Cu2+含量对BaM烧结行为、微观结构和磁性能的影响。研究发现,Cu2+在有效地促进样品烧结的同时还能明显降低其矫顽力(Hc),掺入Cu2+之后,样品矫顽力从2694 Oe(x=0)逐渐降到405 Oe(x=0.6)。当x=0.4时,经950℃煅烧3 h后样品的磁导率为2.0,相对烧结密度达90%以上。分析结果表明,Cu2+的掺入,使样品在烧结过程中形成熔点低于950℃的共晶相,加快传质扩散从而促进烧结。The M-type barium ferrite （BaM） with the chemical formula of BaCuxFe12-xO19-δ（x =0.0,0. 2,0.4,0.6） was prepared by co-precipitation-reflux method. The influences of Cu^2＋ doping content on the sintering behavior, microstructure and electromagnetic property of BaM-ceramic have been investigated. The results reveal that the Cu^2＋ doping not only improved the sintering process effectively, but also decreased the coercivity （Hc） obviously. With the doping of Cu^2＋, the Hc of the sample reduced from 2694 Oe （x = 0） to 405 Oe （x = 0.6 ）. When x value was 0.4, the initial permeability of Cu^2＋ containing BaM ceramics sintered at 950 ℃ for 3 h was 2.0, and the relative sintered density were above 90%. The analysis showed that with the doping of Cu2＋ , the eutectic phase with the melting point below 950 ℃ gradually formed, which promotes the mass transportation and sintering process.

关 键 词：M型钡铁氧体 低温烧结 共沉淀-熔盐法 磁性能 

分 类 号：TB321[一般工业技术—材料科学与工程]