CN106340367B - 一种铁氧体、钕铁硼复合的粘结磁体制备工艺 - Google Patents
一种铁氧体、钕铁硼复合的粘结磁体制备工艺 Download PDFInfo
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- 229920000647 polyepoxide Polymers 0.000 claims abstract description 17
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 17
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims abstract description 17
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims 1
- PXAWCNYZAWMWIC-UHFFFAOYSA-N [Fe].[Nd] Chemical compound [Fe].[Nd] PXAWCNYZAWMWIC-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 18
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Abstract
本发明公开了一种铁氧体、钕铁硼复合的粘结磁体制备工艺,具体步骤为:(1)将锶红铁氧体进行球磨、干燥后,与钕铁硼磁粉混合均匀,得混合料,锶红铁氧体料与钕铁硼磁粉的质量比控制在1:(1~9);(2)将W‑6C环氧树脂溶于丙酮中后,加入混合料搅拌均匀,烘干,W‑6C环氧树脂质量与混合料的质量比为(2~3):100;(3)将烘干的物料加入破碎振筛机中破碎过筛后,压制成磁环后在表面喷漆,烘干后即得产品。本发明工艺步骤简单,可操作性强,产品成本低,一致性与磁性能好,不易生锈。
Description
技术领域
本发明涉及磁性材料制造技术领域,尤其是涉及一种铁氧体、钕铁硼复合的粘结磁体制备工艺。
背景技术
性能最低的粘结钕铁硼磁粉最大磁能积(BH)max达到6MGOe,而最高性能的烧结永磁铁氧体最大磁能积(BH)max只能达到4.5MGOe,因此用纯粘结钕铁硼磁粉替代永磁铁氧体材料使用时,会造成磁性能浪费。
目前粘结钕铁硼磁粉的价格是10~30万/吨,相比之下铁氧体磁体的价格0.3~0.7万/吨。粘结钕铁硼磁粉相比永磁铁氧体材料价格过高,极大的限制了粘结钕铁硼的推广应用。
通过原材料的替代,在保证材料磁性能满足要求的前提下,可以很大程度下降材料成本,这成为了粘结钕铁硼磁粉推广应用的重要途径。但在使用永磁铁氧体材料部分替代钕铁硼中,存在以下问题:
(1)铁氧体粉末为球状,平均粒度0.8-6um,而钕铁硼粉末为鳞片状,平均粒度20-35um,两种磁粉混合不匀,使得混后产品性能一致性差;同时材料模压成型时,密度低,仅3.5-5g/cm3,强度低,产品容易缺角,开裂;
(2)采用常规的电泳工艺对产品进行防腐处理时,由于铁氧体的不导电,导致产品表面防腐涂层不均匀,产品易生锈。
发明内容
本发明是为了解决现有技术中使用永磁铁氧体材料部分替代钕铁硼所存在的上述问题,提供了一种工艺步骤简单,可操作性强的铁氧体、钕铁硼复合的粘结磁体制备工艺,产品成本低,一致性与磁性能好,不易生锈。
为了实现上述目的,本发明采用以下技术方案:
本发明的一种铁氧体、钕铁硼复合的粘结磁体制备工艺,具体步骤为:
(1)将锶红铁氧体进行球磨、干燥后,与钕铁硼磁粉混合均匀,得混合料,锶红铁氧体料与钕铁硼磁粉的质量比控制在1:(1~9);
(2)将W-6C环氧树脂溶于丙酮中后,加入混合料搅拌均匀,烘干,W-6C环氧树脂质量与混合料的质量比为(2~3):100;
(3)将烘干的物料加入破碎振筛机中破碎过筛后,压制成磁环后在表面喷漆,烘干后即得产品。
本发明采用部分永磁铁氧体材料替代钕铁硼磁粉以获得铁氧体与钕铁硼混合的复合磁粉,通过对粒径和混合比例的严格控制,在降低成本的同时保证了磁性能的一致性,并解决了在压模成型过程中强度低,产品容易缺角,开裂的问题,同时通过喷漆成膜解决了产品采用常规电泳会导致表面防腐涂层不均匀,产品易生锈的问题。
作为优选,步骤(1)中,锶红铁氧体球磨至粒径为25~35μm。
作为优选,步骤(1)中,钕铁硼磁粉粒径为25~35μm。
作为优选,步骤(2)中,烘干温度为50~60℃。
作为优选,步骤(3)中,破碎后过100目筛。
作为优选,步骤(3)中,喷漆采用环氧树脂漆EP-703,喷漆厚度为0.03~0.06mm,烘干温度为150~160℃,烘干时间30~60min。
因此,本发明具有如下有益效果:
(1)采用部分永磁铁氧体材料替代钕铁硼磁粉以获得铁氧体与钕铁硼混合的复合磁粉,通过对粒径和混合比例的严格控制,在降低成本的同时保证了磁性能的一致性,并解决了在压模成型过程中强度低,产品容易缺角,开裂的问题;
(2)通过喷漆成膜解决了产品采用常规电泳会导致表面防腐涂层不均匀,产品易生锈的问题;
(3)工艺步骤简单,可操作性强,得到的产品成本低,一致性与磁性能好,不易生锈。
具体实施方式
下面通过具体实施方式对本发明做进一步的描述。
实施例1
(1)将锶红铁氧体进行球磨、干燥后,与钕铁硼磁粉混合均匀,得混合料,锶红铁氧体料与钕铁硼磁粉的质量比控制在1:9,锶红铁氧体球磨至粒径为25μm,钕铁硼磁粉粒径为25μm;
(2)将W-6C环氧树脂溶于丙酮中后,加入混合料搅拌均匀,以50℃稳定烘干,W-6C环氧树脂质量与混合料的质量比为2:100;
(3)将烘干的物料加入破碎振筛机中破碎过100目筛后,压制成磁环后采用环氧树脂漆EP-703在表面喷漆,喷漆厚度为0.03mm,以150℃温度烘干30~min即得产品。
实施例2
(1)将锶红铁氧体进行球磨、干燥后,与钕铁硼磁粉混合均匀,得混合料,锶红铁氧体料与钕铁硼磁粉的质量比控制在1:4,锶红铁氧体球磨至粒径为27μm,钕铁硼磁粉粒径为30μm;
(2)将W-6C环氧树脂溶于丙酮中后,加入混合料搅拌均匀,以55℃稳定烘干,W-6C环氧树脂质量与混合料的质量比为2.5:100;
(3)将烘干的物料加入破碎振筛机中破碎过100目筛后,压制成磁环后采用环氧树脂漆EP-703在表面喷漆,喷漆厚度为0.04mm,以155℃温度烘干40min即得产品。
实施例3
(1)将锶红铁氧体进行球磨、干燥后,与钕铁硼磁粉混合均匀,得混合料,锶红铁氧体料与钕铁硼磁粉的质量比控制在1:1,锶红铁氧体球磨至粒径为35μm,钕铁硼磁粉粒径为35μm;
(2)将W-6C环氧树脂溶于丙酮中后,加入混合料搅拌均匀,以60℃稳定烘干,W-6C环氧树脂质量与混合料的质量比为3:100;
(3)将烘干的物料加入破碎振筛机中破碎过100目筛后,压制成磁环后采用环氧树脂漆EP-703在表面喷漆,喷漆厚度为0.06mm,以160℃温度烘干60min即得产品。
对上述各实施例制得的产品性能进行性能检测,其中磁性能采用磁测仪测试,盐雾试验采用5(wt)%NaCl溶液,测试结果如下表所示:
从上表可以看出,本发明制得的磁体磁性能与强度好,且不易生锈。
以上所述的实施例只是本发明的一种较佳的方案,并非对本发明作任何形式上的限制,在不超出权利要求所记载的技术方案的前提下还有其它的变体及改型。
Claims (4)
1.一种铁氧体、钕铁硼复合的粘结磁体制备工艺,其特征在于,具体步骤为:
(1)将锶铁氧体进行球磨、干燥后,与钕铁硼磁粉混合均匀,得混合料,锶铁氧体与钕铁硼磁粉的质量比控制在1:(1~9);所述锶铁氧体球磨至粒径为25~35μm,所述钕铁硼磁粉粒径为25~35μm;
(2)将W-6C环氧树脂溶于丙酮中后,加入混合料搅拌均匀,烘干,W-6C环氧树脂质量与混合料的质量比为(2~3):100;
(3)将烘干的物料加入破碎振筛机中破碎过筛后,压制成磁环后在表面喷漆,烘干后即得产品。
2.根据权利要求1所述的一种铁氧体、钕铁硼复合的粘结磁体制备工艺,其特征在于,步骤(2)中,烘干温度为50~60℃。
3.根据权利要求1所述的一种铁氧体、钕铁硼复合的粘结磁体制备工艺,其特征在于,步骤(3)中,破碎后过100目筛。
4.根据权利要求1所述的一种铁氧体、钕铁硼复合的粘结磁体制备工艺,其特征在于,步骤(3)中,喷漆采用环氧树脂漆EP-703,喷漆厚度为0.03~0.06mm,烘干温度为150~160℃,烘干时间30~60min。
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Denomination of invention: Preparation process of bonded magnet with ferrite and neodymium iron boron composite Granted publication date: 20190129 Pledgee: Dongyang Branch of China Construction Bank Co.,Ltd. Pledgor: HENGDIAN GROUP DMEGC MAGNETICS Co.,Ltd. Registration number: Y2024330001130 |
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