Preparation of magnetic films by new technique "ultrasound enhanced" ferrite plating

“超声增强”铁氧体电镀新技术制备磁性薄膜

• 批准号: 08455137
• 负责人: ABE Masanori
• 金额: $ 4.99万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455137/
• 关键词: ferrite plating; magnetite; Zi-Zn ferrite; ultrasound waves; ferrite films; フェライトカプセル球

Ferrite plating invented by the investigators enables formation of ferrite films from aqueous solution. Requiring no heat treatment, the ferrite plating facilitates fabrication of ferrite film devices using non-heat-resistant substances (e.g.plastics, nano-sized multilayrs, etc.) as substrates. In this study we combined the ferrite plating with sonochemical technology to improve the crystallinity and magnetic properties of the plated films. Applying power ultrasound waves (19.5kHz, 600W) to an FeCl_2 aqueous solution at 70ﾟC,we successfully encapsulated polyacrylate spheres of two sizes, 0.25 mum and 4.5mum in average diameter, with ferrite coatings of a magnetite-maghemite mixed solution. This broke the previous lower limit (0.3mum) of the size of the particles to be encapsulated ; without application of the ultrasound waves, the ferrite coating became discontinuous or insular. Applying high frequency ultrasound waves (1.6MHz, 20W) and the above low frequency ultrasound waves simultaneously, Fe_3O_4 films were successfully improved in surface smoothness and solubility limit of Ni ions in films of NiZn ferrite (Ni_<3-x-y> Ni_x Zn_y O_4) was increased from x=0.35 to 0.42. The marked improvements are ascribed to "hot spots" and "micro-stirring" caused by collapse of cavitation bubbles in the sonicated aqueous solution.

研究人员从水溶液中发明的铁矿镀膜。 600W）在70°C的FECL_2水溶液中，我们成功地封装了两个尺寸的聚丙烯酸酯球，平均直径为0.25 mum和4.5mum，并带有铁素体涂层超声波，铁氧体涂层变得不连续或岛屿，同时应用高频超声波ABS，Fe_3O_4膜在NIIZN薄膜的表面平滑度和溶解度限制中成功改善从x = 0.35增加到0.42。

项目成果

Y.KITAMOTO,M.H.KIM,S.KANTAKE,M.ABE,and M.NAOE: "Sputter-Deposition of Co-Cr-Ta Alloy Layrs on Ni-Zn Ferrite Plated Underlayrs" IEEE Trans.Magn.33, [5]. 3085-3087 (1997)

Y.KITAMOTO、M.H.KIM、S.KANTAKE、M.ABE 和 M.NAOE：“Ni-Zn 铁氧体镀底层上 Co-Cr-Ta 合金层的溅射沉积”IEEE Trans.Magn.33，[5]

M.ZHANG: "Ferrite-Capsulated Porous Silica Microspheres for Ultrasonic Contrast Agents" J.Phys.IV France. 7[C1]. 669-670 (1997)

M.ZHANG：“用于超声造影剂的铁氧体封装多孔二氧化硅微球”J.Phys.IV France。

阿部 正紀: "生体適合性を有するストラティファイド-フェライトめっき法" 金属. 4月号. 00-00 (1998)

Masanori Abe：“生物相容性分层铁氧体电镀方法”金属，4 月号。

M.ABE: "New Developments in Ferrite Plating" J.Phys.IV France. 7[C1]. 467-470 (1997)

M.ABE：“铁氧体电镀的新发展”J.Phys.IV 法国。

張敏娟: "新技術・超音波励起フェライトメッキによるフェライトカプセル・ポリマー球の作製" 日本応用磁気学会誌. 21[3]. 135-138 (1997)

张敏娟：“利用新技术和超声波激发铁氧体电镀制备铁氧体胶囊和聚合物球”日本应用磁学学会杂志21[3]（1997）。