Grirem Advanced Materials Co., Ltd.

General Research Institute for Nonferrous Metals

Guoke Re Advanced Materials Co., Ltd.

Wenlong Yan

Yang Luo

Dunbo Yu

Hongwei Li

Yuanfei Yang

Jiajun Xie

Ningtao Quan

Hongbin Zhang

Chao Yuan

Kuoshe Li

Guiyong Wu

Shipeng Li

Xiao Lin

Shuai Lu

Zilong Wang

Zhou Hu

Zhongkai Wang

Haijun Peng

Yongqiang Yuan

Kuo Men

The present disclosure discloses an yttrium (Y)-added rare-earth permanent magnetic material and a preparation method thereof. A chemical formula of the material expressed in atomic percentage is (YxRE1-x)aFebalMbNc, wherein 0.05&#x2264;x&#x2264;0.4, 7&#x2264;a&#x2264;13, 0&#x2264;b&#x2264;3, 5&#x2264;c&#x2264;20, and the balance is Fe, namely, bal=100-a-b-c; RE represents a rare-earth element Sm, or a combination of the rare-earth element Sm and any one or more elements of Zr, Nd and Pr; M represents Co and/or Nb; and N represents nitrogen. In the preparation method, the rare-earth element Y is utilized to replace the element Sm of a samarium-iron-nitrogen material. By regulating a ratio of the element Sm to the element Y, viscosity of an alloy liquid can be reduced, and an amorphous forming ability of the material is enhanced.

Yttrium-added rare-earth permanent magnetic material and preparation method thereof

The present invention discloses rare earth-bonded magnetic powder and a preparation method therefor. The bonded magnetic powder is of a multilayer core-shell structure, and comprises a core layer and an antioxidant layer (), wherein the core layer is formed by RFeMB, R is Nd and/or PrNd, and M is one or more of Co, Nb, and Zr; and the core layer is coated with an iron-nitrogen layer (). In addition, the present invention also discloses the preparation method for the rare earth-bonded magnetic powder and a bonded magnet. The oxidation and corrosion of magnetic raw powder during phosphorization and subsequent treatment process are effectively prevented, thereby further improving the long-term temperature resistance and environmental tolerance of the material.

Rare earth-bonded magnetic powder and preparation method therefor, and bonded magnet

Provided are a highly thermostable rare-earth permanent magnetic material, a preparation method thereof and a magnet containing the same. A composition of the rare-earth permanent magnetic material by an atomic percentage is as follows: SmRFeMN, wherein R is at least one of Zr and Hf, M is at least one of Co, Ti, Nb, Cr, V, Mo, Si, Ga, Ni, Mn and Al, x+a is 7-10%, a is 0-1.5%, y is 0-5% and z is 10-14%.

Highly thermostable rare-earth permanent magnetic material, preparation method thereof and magnet containing the same

An alloy material, a bonded magnet, and a modification method of a rare-earth permanent magnetic powder are provided by the present application. A melting point of the alloy material is lower than 600&#xb0; C. and a composition of the alloy material by an atomic part is REMN, wherein RE is one or more of non-heavy rare-earth Nd, Pr, Sm, La and Ce, M is one or more of Cu, Al, Zn and Mg, N is one or more of Ga, In and Sn, x=10-35 and y=1-15.

Alloy material, bonded magnet, and modification method of rare-earth permanent magnetic powder

A rare-earth permanent magnetic powder, a bonded magnet containing thereof and a device using the bonded magnet are provided of the present disclosure. The rare-earth permanent magnetic powder comprises: 70 vol % to 99 vol % of a hard magnetic phase and 1 vol % to 30 vol % of a soft magnetic phase, the hard magnetic phase has a TbCustructure, and the grain size of the hard magnetic phase is 5 nm to 100 nm; the soft magnetic phase is a Fe phase having a bcc structure, the average grain size of the soft magnetic phase is 1 nm to 30 nm, and the standard deviation of the grain size is below 0.5&#x3c3;.

Rare-earth permanent magnetic powder, bonded magnet containing thereof and device using the bonded magnet

The application discloses a rare-earth permanent magnetic powder, a bonded magnet, and a device using the bonded magnet. The rare-earth permanent magnetic powder comprises 4 to 12 at. % of Nd, 0.1 to 2 at. % of C, 10 to 25 at. % of N and 62.2 to 85.9 at. % of T, wherein T is Fe or FeCo and the main phase of the rare-earth permanent magnetic powder is a hard magnetic phase with a TbCustructure. Material volatilization can be avoided effectively during a preparation process of the rare earth permanent magnetic powder, thus improving the wettability with a water-cooling roller during the preparation process and final prepared materials are provided with good magnetic properties.

Rare earth permanent magnetic powder, bonded magnet and device using the bonded magnet

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Beijing, China

Wenlong Yan