CN105913993A - 高耐蚀性、高耐候性稀土永磁材料的制备方法 - Google Patents

高耐蚀性、高耐候性稀土永磁材料的制备方法 Download PDF

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CN105913993A
CN105913993A CN201610476782.5A CN201610476782A CN105913993A CN 105913993 A CN105913993 A CN 105913993A CN 201610476782 A CN201610476782 A CN 201610476782A CN 105913993 A CN105913993 A CN 105913993A
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magnetic material
rare earth
magnetic
earth permanent
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徐�明
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Wuxi New Great Power Electrical Machine Co Ltd
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Wuxi New Great Power Electrical Machine Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/09Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials mixtures of metallic and non-metallic particles; metallic particles having oxide skin
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047Alloys characterised by their composition
    • H01F1/053Alloys characterised by their composition containing rare earth metals
    • H01F1/055Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/057Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
    • H01F1/0571Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
    • H01F1/0575Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together

Abstract

本发明公开了一种高耐蚀性、高耐候性稀土永磁材料的制备方法,通过将1层及1层以上的二硫化钼薄片混入磁性材料粉体中,通过成型制成磁体,提高磁体的散热性能、耐腐蚀性能、磁通量、矫顽力等稀土磁性材料的综合性能。

Description

高耐蚀性、高耐候性稀土永磁材料的制备方法
技术领域
本发明涉及磁性材料制备技术领域,特别涉及一种高耐蚀性、高耐候性稀土永磁材料的制备方法。
背景技术
磁性材料具有磁有序的强磁性物质,广义还包括可应用其磁性和磁效应的弱磁性及反铁磁性物质。磁性是物质的一种基本属性。物质按照其内部结构及其在外磁场中的性状可分为抗磁性、顺磁性、铁磁性、反铁磁性和亚铁磁性物质。铁磁性和亚铁磁性物质为强磁性物质,抗磁性和顺磁性物质为弱磁性物质。磁性材料按性质分为金属和非金属两类.
磁性早在3000年以前就被人们所认识和应用,例如中国古代用天然磁铁作为指南针。现代磁性材料已经广泛的用在我们的生活之中,例如将永磁材料用作马达,应用于变压器中的铁心材料,作为存储器使用的磁光盘,计算机用磁记录软盘等。磁性材料与信息化、自动化、机电一体化、国防、国民经济的方方面面紧密相关。而通常认为,磁性材料是指由过度元素铁、钴、镍及其合金等能够直接或间接产生磁性的物质。磁性材料按磁化后去磁的难易可分为软磁性材料和硬磁性材料。磁化后容易去掉磁性的物质叫软磁性材料,不容易去磁的物质叫硬磁性材料。一般来讲软磁性材料剩磁较小,硬磁性材料剩磁较大。
有实用价值磁性材料基本上都是金属元素、过渡元素和非金属元素的混合物采用不同的工艺方式成型,由于是多种元素的混合物,元素的化学电位不一样,容易发生电化学腐蚀、金相腐蚀等。在实际的使用过程中,磁体的工作环境通常比较恶劣,如高温、高湿、酸性、碱性、油性介子中,这都对磁性材料的使用产生严重的不利影响。对此人们对磁性材料表面进行一系列的表面防腐处理,但都无法解决磁性材料本身的耐腐蚀性。
发明内容
为了克服上述缺陷,本发明提供了一种高耐蚀性、高耐候性稀土永磁材料的制备方法。
本发明为了解决其技术问题所采用的技术方案是:一种高耐蚀性、高耐候性稀土永磁材料的制备方法,在稀土永磁材料粉体均匀混入将1层及1层以上的二硫化钼薄片,通过成型制成磁体,所述二硫化钼薄片的质量百分比为10-20%。
作为本发明的进一步改进,所述稀土永磁材料为钕铁硼。
作为本发明的进一步改进,所述成型工艺烧结、粘结或压制中的一种。
本发明的有益效果是:本发明通过将1层及1层以上的二硫化钼薄片混入磁性材料粉体中,通过成型制成磁体,提高磁体的散热性能、耐腐蚀性能、磁通量、矫顽力等稀土磁性材料的综合性能。
具体实施方式
为了加深对本发明的理解,下面将结合实施例对本发明作进一步详述,该实施例仅用于解释本发明,并不构成对本发明保护范围的限定。
实例一:含二硫化钼的烧结钕铁硼磁体
按N42钕铁硼磁体配料,在电弧熔炼炉中熔炼铸片,通过氢爆工艺粉碎后吸氢脱氢。用气流磨制粉,控制粒径在3-4微米,按质量比10%加入二硫化钼薄片,用99.9999%氩气保护的混料机混合均匀,然后在大于2.0T的磁场中取向,以5MPa压强压成生坯,再以300MPa的压强下等静压60秒。等静压后在真空烧结炉中进行烧结,烧结温度1080℃,时间4小时,回火及淬火冷却。
对比实例一:烧结钕铁硼磁体
按N42钕铁硼磁体配料,在电弧熔炼炉中熔炼铸片,通过氢爆工艺粉碎后吸氢脱氢。用气流磨制粉,控制粒径在3-4微米,然后在大于2.0T的磁场中取向,以5MPa压强压成生坯,再以300MPa的压强下等静压60秒。等静压后在真空烧结炉中进行烧结,烧结温度1080℃,时间4小时,回火及淬火冷却。
表一:磁性能对比
实例二:含二硫化钼的粘结钕铁硼磁体
用市售100目钕铁硼磁粉,经偶联剂处理后,按重量比加入20%的二硫化钼薄片,按重量比加入3%的环氧树脂,0.5%的润滑剂,混合均匀后得磁粉混合物。再通过1200MPa模压成型,保压时间100秒后固化,固化温度120℃,时间180分钟。
对比实例:粘结钕铁硼磁体
用市售100目钕铁硼磁粉,经偶联剂处理后,按重量比加入3%的环氧树脂,0.5%的润滑剂,混合均匀后得磁粉混合物。再通过1200MPa模压成型,保压时间100秒后固化,固化温度120℃,时间180分钟。
表二:磁性能对比

Claims (1)

1.一种高耐蚀性、高耐候性稀土永磁材料的制备方法,其特征在于:在稀土永磁材料粉体均匀混入将1层及1层以上的二硫化钼薄片,通过成型制成磁体,所述二硫化钼薄片的质量百分比为10-20%,所述稀土永磁材料为钕铁硼,所述成型工艺烧结、粘结或压制中的一种。
CN201610476782.5A 2016-06-27 2016-06-27 高耐蚀性、高耐候性稀土永磁材料的制备方法 Pending CN105913993A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1187120A (ja) * 1997-09-04 1999-03-30 Yaskawa Electric Corp 潤滑皮膜付きNd−Fe−B系磁石
CN103730227A (zh) * 2014-01-28 2014-04-16 成都银河磁体股份有限公司 一种纳米双相各向同性复合永磁体及其制备方法
CN104841927A (zh) * 2015-05-07 2015-08-19 昆山瑞仕莱斯高新材料科技有限公司 高耐蚀性、高耐候性稀土永磁材料的制备方法
CN105355412A (zh) * 2015-12-07 2016-02-24 北京科技大学 一种硫化处理获得高磁性烧结钕铁硼的方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1187120A (ja) * 1997-09-04 1999-03-30 Yaskawa Electric Corp 潤滑皮膜付きNd−Fe−B系磁石
CN103730227A (zh) * 2014-01-28 2014-04-16 成都银河磁体股份有限公司 一种纳米双相各向同性复合永磁体及其制备方法
CN104841927A (zh) * 2015-05-07 2015-08-19 昆山瑞仕莱斯高新材料科技有限公司 高耐蚀性、高耐候性稀土永磁材料的制备方法
CN105355412A (zh) * 2015-12-07 2016-02-24 北京科技大学 一种硫化处理获得高磁性烧结钕铁硼的方法

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