文章信息/Info

Title:

Recent Development of High Electrical Resistivity Rare Earth Permanent Magnetic Materials

作者:

鄭立允；房刊；李衛(wèi)

鋼鐵研究總院功能材料研究所

河北工程大學(xué)材料科學(xué)與工程學(xué)院

Author(s):

ZHENG Liyun；FANG Kan；LI Wei

College of Materials Science and Engineering, Hebei University of Engineering

Division of Functional Materials, Central Iron and Steel Research Institute

關(guān)鍵詞:

稀土永磁材料; 電阻率; 最大磁能積; 摻雜

Keywords:

rare earth permanent magnetic materials; electrical resistivity; maximum energy product; doping

DOI:

10.7502/j.issn.1674-3962.2018.09.01

文獻(xiàn)標(biāo)志碼:

A

摘要:

高性能低成本稀土永磁材料是現(xiàn)代技術(shù)和國防尖端技術(shù)的關(guān)鍵組成部分，尤其是牽引電機(jī)和發(fā)動機(jī)等旋轉(zhuǎn)電力設(shè)備。但是其相當(dāng)高的電導(dǎo)率造成服役過程中由于槽紋波、逆變器等產(chǎn)生較大的渦流損耗，引起磁體的溫度升高，甚至引起熱退磁。為解決磁體的渦流及溫升問題，近年來圍繞高電阻率稀土永磁材料展開了一系列研究工作。對摻雜劑種類、無機(jī)絕緣包覆技術(shù)和高電阻率復(fù)合磁體制備技術(shù)等方面進(jìn)行了綜述分析，總結(jié)了粘結(jié)、熱壓和燒結(jié)高電阻率稀土永磁材料的研究現(xiàn)狀，并展望了高電阻率復(fù)合磁體的發(fā)展前景。

Abstract:

Rare earth magnetic materials with high properties and low cost are the critical components of modern technology and national defense sophisticated techniques, especially for the rotating electrical machines such as traction motors and generators. But their fairly higher conductivity leads to larger eddy-current losses due to slot ripple and inverter during the service process, resulting in temperature rise and even thermal demagnetization. To solve the eddy current and temperature rise, the systematic investigations have been done on rare earth permanent magnetic materials with high electrical resistivity. In this paper, recent developments in dopants, insulation coating techniques of magnetic powders and forming techniques for high electrical magnets have been reviewed. The research on the bonded, die-upset and sintered rare earth permanent magnetic materials with high electrical resistivity have summarized. Prospects of developing high electrical resistivity composite magnets are presented.