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充磁机厂家为你解析磁铁、磁性、磁性材料相关问题

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Author:久巨自动化Source:久巨业务部

1.磁铁为什么会有磁性?


物质大都是由分子组成的,分子是由原子组成的,原子又是由原子核和电子组成的。在原子内部,电子不停地自转,并绕原子核旋转,电子的这两种运动都会产生磁性。但是在大多数物质中,电子运动的方向各不相同、杂乱无章,磁效应相互抵消。因此,大多数物质在正常情况下,并不呈现磁性。

铁、钴、镍或铁氧体等铁磁类物质有所不同,它内部的电子自旋可以在小范围内自发地排列起来,形成一个自发磁化区,这种自发磁化区就叫磁畴。铁磁类物质磁化后,内部的磁畴整整齐齐、方向一致地排列起来,使磁性加强,就构成磁铁了。磁铁的吸铁过程就是对铁块的磁化过程,磁化了的铁块和磁铁不同极性间产生吸引力,铁块就牢牢地与磁铁“粘”在一起了。


2.如何定义磁铁的性能?


主要有如下3个性能参数来确定磁铁的性能:

剩磁Br : 永磁体经磁化至技术饱和,并去掉外磁场后,所保留的Br称为剩余磁感应强度。

矫顽力Hc: 使磁化至技术饱和的永磁体的B降低到零,所需要加的反向磁场强度称为磁感矫顽力,简称为矫顽力。

磁能积BH: 代表了磁铁在气隙空间(磁铁两磁极空间)所建立的磁能量密度,即气隙单位体积的静磁能量。


3.金属磁性材料如何划分?


金属磁性材料分为永磁材料、软磁材料二大类。通常将内禀矫顽力大于0.8kA/m的材料称为永磁材料,将内禀矫顽力小于0.8kA/m的材料称为软磁材料。


4.几类常用磁铁的磁力大小比较


磁力从大到小排列为:钕铁硼磁铁、钐钴磁铁、铝镍钴磁铁、铁氧体磁铁。


5.不同磁性材料的性价类比?


铁氧体:性能低和中,价格最低,温度特性良,耐腐蚀,性能价格比好

钕铁硼:性能最高,价格中,强度好,不耐高温和腐蚀

钐钴:性能高,价格最高,脆,温度特性优,耐腐蚀

铝镍钴:性能低和中,价格中,温度特性优,耐腐蚀,耐干扰性差

钐钴,铁氧体,钕铁硼可用烧结和粘结方法制造,烧结磁性能高,成型较差,粘结磁铁成型性好,性能降低很多。AlNiCo可用铸造和烧结方法制造,铸造磁铁性能较高,成型性较差,烧结磁铁较低,成型性较好。


久巨自动化,专注充磁机领域多年,对充磁领域有较深的造诣,我们生产出来的充磁机高效瞬时充磁,安全稳定,深受广大客户的喜爱和好评。如果需要购买充磁机,久巨是你最好的选择!


充磁机-zt.jpg


久巨自动化让工业制造更美好!


长按“识别图中二维码”关注更多点胶机、充磁机、自动化资讯!

以技术为基石,以客户为中心!做进口设备的替代者!


Article classification: 充磁类问题
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Shenzhen hangshaC Shenzhen Jiujuok Industrial Equipment co., Ltd. (www.jiujuok.com) is  National High-tech Enterprise integrating R&D, manufacturing, and sales of the Dispensing equipmentMagnetization euipment, and Industrial Robot . Over the years, the company has been committed to product research and development and innovation, and has established long-term cooperative relations with a number of universities in China, such as Changsha university of science and technology.Obtained a number of national technology patents and passed "national authoritative testing, quality qualified products" firmly, won "China's independent innovation products" and other honors.The products are widely used in electronics (loudspeaker, mobile phone, computer), automobile, optical device, plastic products and other industries, and are widely favored by the market. Learn More


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