CN105551708A - 一种增材制造磁芯以及使用该磁芯的磁性器件 - Google Patents

一种增材制造磁芯以及使用该磁芯的磁性器件 Download PDF

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CN105551708A
CN105551708A CN201610129738.7A CN201610129738A CN105551708A CN 105551708 A CN105551708 A CN 105551708A CN 201610129738 A CN201610129738 A CN 201610129738A CN 105551708 A CN105551708 A CN 105551708A
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magnetic
magnetic material
soft magnetic
iron boron
neodymium iron
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龙克文
颜天宝
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Dongguan Branch Shenzhen Hongfeng Guangcheng Electronic Co Ltd
Foshan Chengxian Technology Co Ltd
Foshan Chuandong Magnetoelectricity Co Ltd
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Dongguan Branch Shenzhen Hongfeng Guangcheng Electronic Co Ltd
Foshan Chengxian Technology Co Ltd
Foshan Chuandong Magnetoelectricity Co Ltd
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Abstract

本发明属于磁芯技术领域，具体公开了一种增材制造磁芯，包括包覆物和内嵌物两种磁性材料，所述的外包覆物磁性材料为MnZn铁氧体软磁材料，所述内嵌物磁性材料为钕铁硼硬磁材料；所述MnZn铁氧体软磁材料通过增材制造技术完全包覆在钕铁硼硬磁材料外侧。本发明通过将钕铁硼硬磁材料和MnZn铁氧体软磁材料结合起来采用增材制造工艺组合加工，制造一种高性能磁芯，避免了传统的异质材料磁性中使用胶水的问题烧结或粘接钕铁硼外电镀耐候性问题，同时，磁性得到控制，可以实现在达到外包覆软磁材料居里温度点时对钕铁硼铁硼硬磁材料磁场的隔离。

Description

一种增材制造磁芯以及使用该磁芯的磁性器件
技术领域
本发明属于磁芯技术领域，具体地说是涉及一种增材制造磁芯。
背景技术
现有钕铁硼硬磁材料通过粘接或烧结磁粉而成，磁粉容易散落因而广泛采用外电镀方式进行包覆，但普遍无法耐受150℃高温及24h盐雾试验等耐候性问题。
因此，现有技术还有待改进。
发明内容
本发明目的在于提供一种高性能的增材制造磁芯。
为达到上述目的，本发明所采取的技术方案为：
一种增材制造磁芯，包括包覆物和内嵌物两种磁性材料，所述的外包覆物磁性材料为MnZn铁氧体软磁材料，所述内嵌物磁性材料为钕铁硼硬磁材料；所述MnZn铁氧体软磁材料通过增材制造工艺完全包覆在钕铁硼硬磁材料外侧。
进一步的，所述的增材制造工艺为选择性激光烧结技术（Selectedlasersintering,SLS）。
进一步的，所述的MnZn铁氧体软磁材料为具有随居里点导磁、失磁变化的软磁材料。
进一步的，所述的MnZn铁氧体软磁材料包括以下摩尔比的物质组分：46-54mol%Fe2O3、19-23mol%Mn3O4、28-32mol%ZnO、3-4mol%碳纤维、2-3mol%石墨烯、适量的去离子水。
进一步的，所述的MnZn铁氧体软磁材料的制备方法如下：
（1）配料：按摩尔比折合成物质质量分别按量称取物质质量备用；
（2）将步骤（1）已经称好质量的Fe2O3、Mn3O4、ZnO、碳纤维混合用行星式球磨机以2倍的去离子水湿磨2h，然后在100℃烘30-40min干燥过筛，随后用马弗炉在10μPa的氧压力1100℃下煅烧2.5h得预烧粉备用；
（3）将预烧粉中加入石墨烯,在星式球磨机二次球磨6h至干燥，然后按照一定的升温速度从室温生至1300℃保温5h，进行平衡气氛烧结，即得。
进一步的，所述的MnZn铁氧体软磁材料在居里温度点附近可隔离钕铁硼硬磁材料的磁场。
一种包含上述增材制造磁芯的磁性器件。
本发明的有益效果：
本发明通过将钕铁硼硬磁材料和MnZn铁氧体软磁材料结合起来采用增材制造工艺组合加工，制造一种高性能磁芯，避免了传统烧结或粘接钕铁硼外电镀耐候性问题，同时，磁性得到控制，可以实现在达到外包覆软磁材料居里温度点时对钕铁硼硬磁磁场的隔离，再者，外包覆软磁材料采用铁氧体材料高温烧结而成解决了一般钕铁硼硬磁材料外电镀工艺不环保、难以通过72h盐雾试验、高温剥落等耐候性问题。
具体实施方式
下面结合具体实施例对本发明所述技术方案作进一步的说明。
实施例1：
一种增材制造磁芯，包括包覆物和内嵌物两种磁性材料，所述的外包覆物磁性材料为MnZn铁氧体软磁材料，所述内嵌物磁性材料为钕铁硼硬磁材料；所述MnZn铁氧体软磁材料通过增材制造工艺完全包覆在钕铁硼硬磁材料外侧。
进一步的，所述的增材制造工艺为选择性激光烧结技术（Selectedlasersintering,SLS）。
进一步的，所述的MnZn铁氧体软磁材料为具有随居里点导磁、失磁变化的软磁材料。
进一步的，所述的MnZn铁氧体软磁材料在居里温度点附近可隔离钕铁硼硬磁材料的磁场。
一种包含上述增材制造磁芯的磁性器件。
实施例2：
MnZn铁氧体软磁材料包括以下摩尔比的物质组分：46mol%Fe2O3、19mol%Mn3O4、28mol%ZnO、4mol%碳纤维、3mol%石墨烯、适量的去离子水。
MnZn铁氧体软磁材料的制备方法如下：
（1）配料：按摩尔比折合成物质质量分别按量称取物质质量备用；
（2）将步骤（1）已经称好质量的Fe2O3、Mn3O4、ZnO、碳纤维混合用行星式球磨机以2倍的去离子水湿磨2h，然后在100℃烘35min干燥过筛，随后用马弗炉在10μPa的氧压力1100℃下煅烧2.5h得预烧粉备用；
（3）将预烧粉中加入石墨烯,在星式球磨机二次球磨6h至干燥，然后按照一定的升温速度从室温生至1300℃保温5h，进行平衡气氛烧结，即得。
实施例3：
MnZn铁氧体软磁材料包括以下摩尔比的物质组分：50mol%Fe2O3、21mol%Mn3O4、30mol%ZnO、3.5mol%碳纤维、2.5mol%石墨烯、适量的去离子水。
MnZn铁氧体软磁材料的制备方法如下：
（1）配料：按摩尔比折合成物质质量分别按量称取物质质量备用；
（2）将步骤（1）已经称好质量的Fe2O3、Mn3O4、ZnO、碳纤维混合用行星式球磨机以2倍的去离子水湿磨2h，然后在100℃烘35min干燥过筛，随后用马弗炉在10μPa的氧压力1100℃下煅烧2.5h得预烧粉备用；
（3）将预烧粉中加入石墨烯,在星式球磨机二次球磨6h至干燥，然后按照一定的升温速度从室温生至1300℃保温5h，进行平衡气氛烧结，即得。
实施例4：
MnZn铁氧体软磁材料包括以下摩尔比的物质组分：54mol%Fe2O3、23mol%Mn3O4、32mol%ZnO、3mol%碳纤维、2mol%石墨烯、适量的去离子水。
MnZn铁氧体软磁材料的制备方法如下：
（1）配料：按摩尔比折合成物质质量分别按量称取物质质量备用；
（2）将步骤（1）已经称好质量的Fe2O3、Mn3O4、ZnO、碳纤维混合用行星式球磨机以2倍的去离子水湿磨2h，然后在100℃烘35min干燥过筛，随后用马弗炉在10μPa的氧压力1100℃下煅烧2.5h得预烧粉备用；
（3）将预烧粉中加入石墨烯,在星式球磨机二次球磨6h至干燥，然后按照一定的升温速度从室温生至1300℃保温5h，进行平衡气氛烧结，即得。
分别对实施例2-4所得到的MnZn铁氧体软磁材料进行了主要性能测试，测试结果如下：
实施例1 实施例2 实施例3
饱和磁通密度Bs(MT) 4416.4 4430.3 4410.2
起始磁导率μi 339.8 358.2 346.9
功率损耗(W.m-3)Pcv 84.5 78.9 86.5

Claims (7)

1.一种增材制造磁芯，其特征在于，包括包覆物和内嵌物两种磁性材料，所述的外包覆物磁性材料为MnZn铁氧体软磁材料，所述内嵌物磁性材料为钕铁硼硬磁材料；所述MnZn铁氧体软磁材料通过增材制造工艺完全包覆在钕铁硼硬磁材料外侧。
2.根据权利要求1所述的一种增材制造磁芯，其特征在于：所述的增材制造工艺为选择性激光烧结技术。
3.根据权利要求1所述的一种增材制造磁芯，其特征在于：所述的MnZn铁氧体软磁材料为具有随居里点导磁、失磁变化的软磁材料。
4.根据权利要求4所述的一种增材制造磁芯，其特征在于：所述的MnZn铁氧体软磁材料包括以下摩尔比的物质组分：46-54mol%Fe2O3、19-23mol%Mn3O4、28-32mol%ZnO、3-4mol%碳纤维、2-3mol%石墨烯、适量的去离子水。
5.根据权利要求4所述的一种增材制造磁芯，其特征在于：所述的MnZn铁氧体软磁材料的制备方法如下：
（1）配料：按摩尔比折合成物质质量分别按量称取物质质量备用；
（2）将步骤（1）已经称好质量的Fe2O3、Mn3O4、ZnO、碳纤维混合用行星式球磨机以2倍的去离子水湿磨2h，然后在100℃烘30-40min干燥过筛，随后用马弗炉在10μPa的氧压力1100℃下煅烧2.5h得预烧粉备用；
（3）将预烧粉中加入石墨烯,在星式球磨机二次球磨6h，在100℃烘20-30min至干燥，然后放入马弗炉中按照一定的升温速度从100℃生至1300℃保温5h，进行平衡气氛烧结，即得。
6.根据权利要求1-5任一项所述的一物质种增材制造磁芯，其特征在于：所述的MnZn铁氧体软磁材料在居里温度点附近可隔离钕铁硼硬磁材料的磁场。
7.一种包含权利要求6所述的增材制造磁芯的磁性器件。
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