工业纯混合稀土制备新型钕铁硼永磁材料的工艺研究
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摘要
提供了一种以工业纯混合稀土为原料制备的稀土铁硼材料及其制备方法和应用,所述原料包括Pr-Nd混合稀土和La-Ce混合稀土,该材料具有Nd_2Fe_(14)B型结构,化学式:[(La-Ce)_x(Pr-Nd)_(1-x)]_y(Fe,TM)_(1-y-z)B_z,其中,x=1%～99%(原子分数),y=12%～17%(原子分数),z=5%～8.5%(原子分数)。该发明母合金原料配方同时采用工业纯La-Ce和Pr-Nd两种混合稀土,但不影响2:14:1永磁主相的生成,以及磁性单相行为的出现,保持了稀土铁硼永磁材料的优良磁性能,减小了对高纯单质稀土原料的依赖性,降低了材料的制备成本,对于开发低成本的稀土永磁材料并拓展其应用具有重要的实际意义。研究获得的新型钕铁硼永磁材料的剩余磁化强度可达0.55～1.07T,内禀矫顽力可达819.9～1440.8kA/m,最大磁能积可达43.0～125.0kJ/m~3。
A rare earth iron boron material prepared with industrial pure rare earth as raw material and its preparation method and application were provided.The raw material includes Pr-Nd mixed rare earth and La-Ce mixed rare earth.The material has a Nd_2Fe_(14) B type structure,a chemical formula:[(La-Ce)_x(Pr-Nd)_(1-x)]_y(Fe,TM)_(1-y-z)B_z,wherein x=1%-99%(atom fraction),y=12%-17%(atom fraction),z=5%-8.5%(atom fraction).The mother alloy material of the invention also uses two kinds of mixed rare earth of industrial pure La-Ce and Pr-Nd,but does not affect the generation of the primary phase of the 2:14:1 permanent magnet and the appearance of the magnetic single-phase behavior.It keeps the excellent magnetic properties of the rare earth iron and boron permanent magnetic material,reduces the dependence on the raw material of the high purity mono rare earth,and reduces the preparation cost of the material.It has important practical significance for developing low cost rare earth permanent magnet materials and expanding their applications.According to the rare earth iron and boron material provided by the invention,the intrinsic coercive force of the rare earth iron and boron material can reach 819.9-1 440.8 kA/m,the residual magnetization of the material can reach 0.55-1.07 T,and the maximum magnetic energy product can reach 43.0-125.0 kJ/m~3 or even higher.
A rare earth iron boron material prepared with industrial pure rare earth as raw material and its preparation method and application were provided.The raw material includes Pr-Nd mixed rare earth and La-Ce mixed rare earth.The material has a Nd_2Fe_(14) B type structure,a chemical formula:[(La-Ce)_x(Pr-Nd)_(1-x)]_y(Fe,TM)_(1-y-z)B_z,wherein x=1%-99%(atom fraction),y=12%-17%(atom fraction),z=5%-8.5%(atom fraction).The mother alloy material of the invention also uses two kinds of mixed rare earth of industrial pure La-Ce and Pr-Nd,but does not affect the generation of the primary phase of the 2:14:1 permanent magnet and the appearance of the magnetic single-phase behavior.It keeps the excellent magnetic properties of the rare earth iron and boron permanent magnetic material,reduces the dependence on the raw material of the high purity mono rare earth,and reduces the preparation cost of the material.It has important practical significance for developing low cost rare earth permanent magnet materials and expanding their applications.According to the rare earth iron and boron material provided by the invention,the intrinsic coercive force of the rare earth iron and boron material can reach 819.9-1 440.8 kA/m,the residual magnetization of the material can reach 0.55-1.07 T,and the maximum magnetic energy product can reach 43.0-125.0 kJ/m~3 or even higher.
引文
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[11]管立斌,牛晋军,郝思忠,等.利用混合稀土制备稀土永磁体的工艺研究[J].中国材料进展,2009,28(3):51.
[12]美国专利US2012/0285583A1.
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[14]路清梅,钮建,岳明,等.一种廉价轻稀土镧铈铁硼纳米晶永磁体的制备方法[P].中国专利,CN106816249A.2017.
[2]仲洪海,倪狄,程敏,等.粘结剂和温压工艺对粘结钕铁硼材料性能的影响[J].粉末冶金工业,2018,28(3):61.
[3]于濂清,黄翠翠,袁永锋.Nd,Dy含量对高磁能积烧结NdFeB磁性能和耐蚀性影响[J].粉末冶金工业,2008,18(6):19.
[4]李丽娅,易健宏,彭元东,等.纳米晶稀土永磁材料的制备技术研究进展[J].粉末冶金工业,2005,15(5):38.
[5]严密,金佳莹,马天宇,等.新型富La/Ce多主相稀土永磁材料研究[J].金属功能材料,2018,25(1):1.
[6]钟淑伟,杜君峰,庞再升,等.Y取代量对双主相Nd-Y-Fe-B磁体性能与微观组织的影响[J].金属功能材料,2017,24(5):32.
[7]刘帅,秦晓宁,张策,等.Alnico合金添加量对Nd-Fe-B薄带磁体的微结构和磁性能的影响[J].金属功能材料,2017,24(4):17.
[8]吴灵葳,赵凤山,李学东.Ce-Nd-Fe-B烧结永磁合金[J].功能材料,1986(6):3.
[9]常秀敏.添加混合稀土的廉价Nd-Fe-B的研究,稀有金属[J].2002,26(4):284.
[10]连法增,张效时,艾禄,等.富Nd混合稀土MR-Fe-B永磁合金的性能[J].东北大学学报:自然科学版,1988(1):26.
[11]管立斌,牛晋军,郝思忠,等.利用混合稀土制备稀土永磁体的工艺研究[J].中国材料进展,2009,28(3):51.
[12]美国专利US2012/0285583A1.
[13]美国专利US2013/0160896A1.
[14]路清梅,钮建,岳明,等.一种廉价轻稀土镧铈铁硼纳米晶永磁体的制备方法[P].中国专利,CN106816249A.2017.