客服热线:18202992950

Hexagonal crystal ferrite magnetic powder for magnetic recording, method for producing the same, a 发明授权

2023-08-04 4040 833K 0

专利信息

申请日期 2025-07-11 申请号 US13500989
公开(公告)号 US8801956B2 公开(公告)日 2014-08-12
公开国别 US 申请人省市代码 全国
申请人 Kenji Masada; Tomoyuki Ishiyama; Gousuke Iwasaki
简介 A hexagonal crystal ferrite magnetic powder having high magnetic characteristics while having a small particle volume and a high specific surface area is provided, and a high-density magnetic recording medium using the powder. A method for producing a hexagonal crystal ferrite formed using a glass crystallization method includes the steps of : mixing a glass matrix with raw materials including iron, bismuth, a divalent metal (M1), a tetravalent metal (M2), any one kind (A) of barium, strontium, calcium, and lead, and at least one kind of rare earth element (represented by R) having a mole equal to or less than that of the iron; heating the mixed raw material to obtain a glass body; quenching the glass body, pulverizing the glass body, and performing a heat treatment, and washing the glass body after the heat treatment with an acid solution.


您还没有登录,请登录后查看下载地址


反对 0举报 0 收藏 0 打赏 0评论 0
下载排行
网站首页  |  关于我们  |  联系方式  |  使用协议  |  版权隐私  |  网站地图  |  排名推广  |  广告服务  |  积分换礼  |  网站留言  |  RSS订阅  |  违规举报  |  京ICP备2021025988号-4