Synthesis and Application of High-coercive Magnetic Powders in Rare Earth Intermetallic Compound Systems

稀土金属间化合物体系高矫顽磁粉的合成及应用

• 批准号: 07555271
• 负责人: MACHIDA Ken-ichi
• 金额: $ 4.22万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555271/
• 关键词: Rare Earth Intermetallic Compounds; Interstitial Metal Nitrides; Permanent Magnets; Bonded Magnets; Coercivity; Remanence; Maximum Energy Product; Photochemical Vapor Deposition

Rare earth intermetallic compounds, Sm_2Fe_<17> (C,N) _x and Nd (Fe, M) _<12> (C,N) _x, were prepared by conventional melting method and were finely and uniformly ground up to a particle size below 3 mum by ball-milling in a hexane solution containing a surface active agent. Furthermore, the surface of Sm_2Fe_<17>N_x powders was coated and stabilized by the zinc metal produced from Zn (C_2H_5) _2 according to photochemical vapor deposition process. The resulting Zn/Sm_2Fe_<17>N_x powders showed high coercivity and remanence values to provide a big maximum energy product around 320 kJm^<-3>. It was demonstrated that the epoxy resin-bonded magnets produced from the Zn/Sm_2Fe_<17>N_x composite powders possessed high-performance permanent magnetic characteristics : (BH) max = -176kJm^<-3> and good resistivity for oxidation. Also, these magnets showed the less irreversible flux loss in magnetization even than the Sm_2 (Fe, Co) _<17>N_x ones, of which the stability was much improved by Co addition,

采用传统熔融法制备了稀土金属间化合物Sm_2Fe_&lt；17&gt；(C，N)_x和Nd(Fe，M)_&lt；12&gt；(C，N)_x，并在含有表面活性剂的正己烷溶液中进行了球磨，得到了粒度小于3微米的稀土金属间化合物。此外，采用光化学气相沉积法在Sm_2Fe_(lt；17)&Gt；N_x粉末表面包覆并稳定了由Zn(C_2H_5)_2生成的金属锌。得到的Zn/Sm2Fe&lt；17&gt；Nx粉末具有较高的矫顽力和剩磁，在320KJM^&lt；-3&gt；附近有较大的最大能量积。结果表明，由Zn/Sm2Fe&lt；17&gt；Nx复合粉末制备的环氧树脂粘结磁体具有高性能的永磁体性能：(Bh)max=-176kJm^&lt；-3&gt；此外，这些磁体的不可逆磁化损失甚至比Sm_2(Fe，Co)_(17)&GT；N_x磁体的磁化不可逆磁通损失更小，其中Co的加入大大提高了稳定性。

项目成果

Ken-ichi Machida: "New Processing Routes for the Preparation of Sm_2Fe_<17>M_x(M=C and/orN)Materials" Journal of Alloys and Compounds. 222. 18-22 (1995)

Ken-ichi Machida：“制备Sm_2Fe_ 17 > M_x(M=C和/或N)材料的新加工路线”合金与化合物杂志。

Ken-ichi Machida: "Rare-Earth Magnets and Their Applications, " ed.by F.P.Missell, V.Villas-Boas, H.R.Rechenberg, and F.J.G.Landgraf, "High-performance Characteristics of the Bonded Magnets Produced from the Sm_2Fe_<17>N_x Powder Stabilized by Photo-induc

Ken-ichi Machida：“稀土磁体及其应用”，F.P.Missell、V.Villas-Boas、H.R.Rechenberg 和 F.J.G.Landgraf 编辑，“由 Sm_2Fe_ 生产的粘结磁体的高性能特性<17>

Hirokazu Izumi: "High-Performance Characteristics of Bonded Magnets Produced Using Sm_2Fe_<17>N_x Powder Stabilized by Photoinduced Zinc Metal Coating" Japanese Journal of Applied Physics. 35. L894-L896 (1996)

Hirokazu Izumi：“使用光致锌金属涂层稳定的 Sm_2Fe_<17>N_x 粉末生产的粘结磁体的高性能特性”日本应用物理学杂志。

Hirokazu Izumi: "Crystal Structures and Magnetic Properties of Nd(Fe,M)_<12>C_x and Nd(Fe,M)_<12>C_xN_y((M=Mo,Ti,V) Prepared by Cast Method" Journal of Alloys and Compounds. 233. 231-235 (1996)

Hirokazu Izumi：“铸造法制备的Nd(Fe,M)_<12>C_x和Nd(Fe,M)_<12>C_xN_y((M=Mo,Ti,V))的晶体结构和磁性”杂志

Ken-ichi Machida: "Effective Grinding Procedure for Sm_2Fe_<17>N_x Powder with High-Performance Permanent Magnetic Characteristics" Jpn.J.Appl.Phys.34. L741-L743 (1995)

Ken-ichi Machida：“具有高性能永磁特性的 Sm_2Fe_<17>N_x 粉末的有效研磨程序”Jpn.J.Appl.Phys.34。