CN106830911B - 制造复杂形状超高大锰锌铁氧体的方法 - Google Patents

制造复杂形状超高大锰锌铁氧体的方法 Download PDF

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CN106830911B
CN106830911B CN201611247555.1A CN201611247555A CN106830911B CN 106830911 B CN106830911 B CN 106830911B CN 201611247555 A CN201611247555 A CN 201611247555A CN 106830911 B CN106830911 B CN 106830911B
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黄卫
刘云龙
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Shandong Dongtai Fangsi Electronic Co., Ltd
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Abstract

本发明涉及一种制造复杂形状超高大锰锌铁氧体的方法，属于锰锌铁氧体磁粉的制造工艺领域，首先配置原料，将原料依次进行球磨和砂磨，然后将研磨完成的原料进行造粒，造粒后对原料进行预烧，预烧完成后再依次进行球磨和砂磨，然后再造粒，造粒后将原料放入成型模具中进行成型，最后烧制成型，用普通原材料配制、压型、烧结，能达到磁路长度不低于1m，有效截面积不小于10cm2，变形量不超过1.2mm的铁氧体。

Description

制造复杂形状超高大锰锌铁氧体的方法
技术领域
本发明涉及一种制造复杂形状超高大锰锌铁氧体的方法，属于锰锌铁氧体磁粉的制造工艺领域。
背景技术
为了提高锰锌铁氧体的变电能力，需要增加磁芯的功率密度。其一：增大峰值电流且保证足够的爬电距离，对锰锌铁氧体需要尽可能的增加磁芯的有效磁路长度，要求有效磁路长度不低于400mm；其二：提高磁通量，对磁芯来讲需要有效截面积需要尽可能大，要求有效截面积在10cm2以上。据此，超高大磁芯的单只重量1kg以上，单只高度120mm以上。但受到粉末冶金加工制造技术制约，现有超高大磁芯的生产技术是采取多个磁芯粘结组合的方式，一般单只磁芯高度40mm左右，需要分三部分粘结，该生产工艺带来诸多的问题，如耐温性低、胶水脱落、产品稳定性下降，磁芯之间的公差大导致漏磁等，因此急需一种一体化成型超高大锰锌铁氧体的方法，并能实现工业化批量生产。
发明内容
本发明目的在于提供一种制造复杂形状超高大锰锌铁氧体的方法，用普通原材料配制、压型、烧结，能达到磁路长度不低于400mm，有效截面积不小于10cm2，变形量不超过1.2mm的铁氧体。
本发明所述的制造复杂形状超高大锰锌铁氧体的方法，首先配置原料，将原料依次进行球磨和砂磨，然后将研磨完成的原料进行造粒，造粒后对原料进行预烧，预烧完成后再依次进行球磨和砂磨，然后再造粒，造粒后将原料放入成型模具中进行成型，最后烧制成型。
所述的制造复杂形状超高大锰锌铁氧体的方法，造粒过程中，制作的磁粉颗粒分布为180目≤5％，80-160目≥88％。
所述的制造复杂形状超高大锰锌铁氧体的方法，预烧过程中的温度范围为850-950℃，松装密度1.4-1.45g/cm3，流动角≤30°。
所述的制造复杂形状超高大锰锌铁氧体的方法，压制过程中压机的压制行程≥400mm，且能实现五段压制。
所述的制造复杂形状超高大锰锌铁氧体的方法，烧结过程使用氮气推板窑、真空炉或钟罩炉。
本发明与现有技术相比所具有的有益效果是：
本发明所述的制造复杂形状超高大锰锌铁氧体的方法，按本发明工艺制作的超高大锰锌铁氧体，有效截面积不低于10cm2，有效磁路长度不低于400mm，单只重量不低于1Kg，超大型磁芯不需要粘结即可达到需要的使用高度，还可用于其他简单形状锰锌铁氧体的制造，可实现压制高度160mm，由于是一次成型的，所以能保证变形量不超过1.2mm，可连续或周期性生产。
具体实施方式
下面对本发明的实施例做进一步描述：
本发明所述的制造复杂形状超高大锰锌铁氧体的方法，首先配置原料，以氧化铁红Fe2O3、氧化锰Mn3O4、氧化锌ZnO为原料制作磁粉，将原料依次进行球磨和砂磨，然后将研磨完成的原料进行造粒，造粒后对原料进行预烧，预烧完成后再依次进行球磨和砂磨，然后再造粒，造粒后将原料放入成型模具中进行成型，最后烧制成型。
所述的制造复杂形状超高大锰锌铁氧体的方法，造粒过程中，制作的磁粉颗粒分布为180目≤5％，80-160目≥88％。
所述的制造复杂形状超高大锰锌铁氧体的方法，预烧过程中的温度范围为850-950℃，松装密度1.4-1.45g/cm3，流动角≤30°。当提高预烧温度后，氧化铁红中的有害杂质如氯根、酸根等达到挥发点排除。
所述的制造复杂形状超高大锰锌铁氧体的方法，压制过程中压机的压制行程≥400mm，且能实现五段压制。
所述的制造复杂形状超高大锰锌铁氧体的方法，烧结过程使用氮气推板窑、真空炉或钟罩炉。
所述的制造复杂形状超高大锰锌铁氧体的方法，磁粉压制前需预处理，加一定比例纯水是为了防止胚件开裂和加入硬质酸锌的目的是增加磁粉的流动性，使压制时的密度分布范围窄且均匀。

Claims (4)

1.一种制造复杂形状超高大锰锌铁氧体的方法，其特征在于，首先配置原料，将原料依次进行球磨和砂磨，然后将研磨完成的原料进行造粒，造粒后对原料进行预烧，预烧完成后再依次进行球磨和砂磨，然后再造粒，再造粒后将原料放入成型模具中进行成型，最后烧制成型；
造粒和再造粒过程中，制作的磁粉颗粒分布为180目≤5%，80-160目≥88%。
2.根据权利要求1所述的制造复杂形状超高大锰锌铁氧体的方法，其特征在于，预烧过程中的温度范围为850-950℃，松装密度1.4-1.45g/cm3，流动角≤30°。
3.根据权利要求2所述的制造复杂形状超高大锰锌铁氧体的方法，其特征在于，压制过程中压机的压制行程≥400mm，且能实现五段压制。
4.根据权利要求3所述的制造复杂形状超高大锰锌铁氧体的方法，其特征在于，烧结过程使用氮气推板窑、真空炉或钟罩炉。
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CN102097195A (zh) * 2010-12-22 2011-06-15 娄底市玖鑫电子科技有限公司 一种宽温低功率损耗铁氧体磁性材料
CN103172358A (zh) * 2013-03-21 2013-06-26 电子科技大学 高Bs高Tc MnZn铁氧体材料及制备方法
CN103724006A (zh) * 2013-12-04 2014-04-16 江门安磁电子有限公司 一种宽频超高磁导率MnZn铁氧体材料的制造方法
CN104261814A (zh) * 2014-09-23 2015-01-07 绵阳市宏扬科技有限公司 一种用于粒子加速装置的超大尺寸铁氧体及其制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102097195A (zh) * 2010-12-22 2011-06-15 娄底市玖鑫电子科技有限公司 一种宽温低功率损耗铁氧体磁性材料
CN103172358A (zh) * 2013-03-21 2013-06-26 电子科技大学 高Bs高Tc MnZn铁氧体材料及制备方法
CN103724006A (zh) * 2013-12-04 2014-04-16 江门安磁电子有限公司 一种宽频超高磁导率MnZn铁氧体材料的制造方法
CN104261814A (zh) * 2014-09-23 2015-01-07 绵阳市宏扬科技有限公司 一种用于粒子加速装置的超大尺寸铁氧体及其制备方法

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