CN105503168A - 一种提高MnZn功率铁氧体强度的方法 - Google Patents

一种提高MnZn功率铁氧体强度的方法 Download PDF

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CN105503168A
CN105503168A CN201510924456.1A CN201510924456A CN105503168A CN 105503168 A CN105503168 A CN 105503168A CN 201510924456 A CN201510924456 A CN 201510924456A CN 105503168 A CN105503168 A CN 105503168A
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power ferrite
mnzn power
sintering
mnzn
improving
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吕东华
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Hengdian Group DMEGC Magnetics Co Ltd
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Hengdian Group DMEGC Magnetics Co Ltd
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
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Abstract

本发明公开了一种提高MnZn功率铁氧体强度的方法。它具体操作步骤如下：通过常规技术制备主配方为Fe2O3、Mn3O4和ZnO的MnZn功率铁氧体的砂磨料；进行喷雾造粒获得粉料；通过常规技术将所得粉料在一定压力下压制成型；进行烧结，具体烧结工艺为：从400℃开始，将氧含量降低到10ppm-60ppm，一直到1300-1330℃，保温2小时；然后，将氧含量控制在3％-6％，继续烧结5小时，获得成品。本发明的有益效果是：通过造粒方式的选取和烧结工艺的改善，不受MnZn功率铁氧体的配方限制，只要是功率铁氧体都可以用该方法提高强度。

Description

一种提高MnZn功率铁氧体强度的方法
技术领域
本发明涉及MnZn功率铁氧体相关技术领域，尤其是指一种提高MnZn功率铁氧体强度的方法。
背景技术
在提到MnZn功率铁氧体时，人们大多会注重材料的损耗和饱和磁感应强度Bs，但在实际应用中，还需要考虑到制成产品强度的问题。
目前大的PQ型产品，E法强度很难达到17kg以上。或者达到17kg以上了，也通过添加助熔剂来实现，但是却牺牲了损耗。
发明内容
本发明是为了克服现有技术中存在上述的不足，提供了一种不受MnZn功率铁氧体配方限制的提高MnZn功率铁氧体强度的方法。
为了实现上述目的，本发明采用以下技术方案：
一种提高MnZn功率铁氧体强度的方法，具体操作步骤如下：
(1)通过常规技术制备主配方为Fe2O3、Mn3O4和ZnO的MnZn功率铁氧体的砂磨料；
(2)进行喷雾造粒获得粉料；
(3)通过常规技术将所得粉料在一定压力下压制成型；
(4)进行烧结，具体烧结工艺为：从400℃开始，将氧含量降低到10ppm-60ppm，一直到1300-1330℃，保温0.5-2小时；然后，将氧含量控制在3％-6％，继续烧结5小时，获得成品。
本发明通过注重烧结工艺的改善来提高产品的强度，不受MnZn功率铁氧体的配方限制，只要是功率铁氧体都可以用该方法提高强度。
作为优选，在步骤(2)中，将步骤(1)中的砂磨料用离心喷雾塔进行离心喷雾造粒获得粉料。与普通的喷雾造粒相比，离心造粒所得的颗粒料密度更高，能承受更大的压力，毛坯密度更高；同样通过注重造粒方式的选取来提高产品的强度，不受MnZn功率铁氧体的配方限制，只要是功率铁氧体都可以用该方法提高强度。
本发明的有益效果是：通过造粒方式的选取和烧结工艺的改善，不受MnZn功率铁氧体的配方限制，只要是功率铁氧体都可以用该方法提高强度。
具体实施方式
下面结合具体实施方式对本发明做进一步的描述。
实施例1：
将主配方为70％的Fe2O3、24.5％的Mn3O4和5.5％的ZnO的砂磨料，用离心喷雾塔进行喷雾造粒，所得粉料在一定压力下压制成PQ35/35器件，在400℃开始将氧含量降低到10ppm-30ppm，一直到1300℃，保温2小时，然后将氧含量控制在3％，继续烧结5小时。所得PQ35/35样品按E法测试强度，具体数据见表1。
比较例1：
将主配方为70％的Fe2O3、24.5％的Mn3O4和5.5％的ZnO的砂磨料，用普通喷雾塔进行喷雾造粒，所得粉料在一定压力下压制成PQ35/35器件，在400℃开始将氧含量降低到10ppm-30ppm，一直到1300℃，保温2小时，然后将氧含量控制在3％，继续烧结5小时。所得PQ35/35样品按E法测试强度，具体数据见表1。
表1实施例1和比较例1样品E法强度比较
E法强度(kg)
实施例1 25
比较例1 15.5
从表1中可以看出，比较例1未通过离心喷雾塔进行离心喷雾造粒，故而所制得的MnZn功率铁氧体强度比较差。
实施例2：
将主配方为71％的Fe2O3、24.5％的Mn3O4和4.5％的ZnO的砂磨料，用离心喷雾塔进行喷雾造粒，所得粉料在一定压力下压制成PQ35/35器件，在400℃开始将氧含量降低到30ppm-60ppm，一直到1330℃，保温0.5小时，然后将氧含量控制在6％，继续烧结5小时。所得PQ35/35样品按E法测试强度，具体数据见表2。
比较例2：
将主配方为71％的Fe2O3、24.5％的Mn3O4和4.5％的ZnO的砂磨料，用普通喷雾塔进行喷雾造粒，所得粉料在一定压力下压制成PQ35/35器件，在400℃开始将氧含量维持在21％，一直到900℃，900℃之后将氧含量降低到30ppm-60ppm，一直到1330℃，保温0.5小时，然后将氧含量控制在6％，继续烧结5小时。所得PQ35/35样品按E法测试强度，具体数据见表2。
表2实施例2和比较例2样品E法强度比较
E法强度(kg)
实施例2 28
比较例2 13
从表2中可以看出，比较例2未进行离心喷雾造粒，同时烧结工艺的改变，故而所制得的MnZn功率铁氧体强度比较差。

Claims (2)

1.一种提高MnZn功率铁氧体强度的方法，其特征是，具体操作步骤如下：
(1)通过常规技术制备主配方为Fe2O3、Mn3O4和ZnO的MnZn功率铁氧体的砂磨料；
(2)进行喷雾造粒获得粉料；
(3)通过常规技术将所得粉料在一定压力下压制成型；
(4)进行烧结，具体烧结工艺为：从400℃开始，将氧含量降低到10ppm-60ppm，一直到1300-1330℃，保温0.5-2小时；然后，将氧含量控制在3％-6％，继续烧结5小时，获得成品。
2.根据权利要求1所述的一种提高MnZn功率铁氧体强度的方法，其特征是，在步骤(2)中，将步骤(1)中的砂磨料用离心喷雾塔进行离心喷雾造粒获得粉料。
CN201510924456.1A 2015-12-12 2015-12-12 一种提高MnZn功率铁氧体强度的方法 Pending CN105503168A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110903720A (zh) * 2018-09-18 2020-03-24 南京禾鑫坊电子科技有限公司 一种电子设备用喷涂复合式电磁屏蔽材料

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CN104446410A (zh) * 2014-11-04 2015-03-25 横店集团东磁股份有限公司 一种锰锌系铁氧体及其制备方法

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CN104446410A (zh) * 2014-11-04 2015-03-25 横店集团东磁股份有限公司 一种锰锌系铁氧体及其制备方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110903720A (zh) * 2018-09-18 2020-03-24 南京禾鑫坊电子科技有限公司 一种电子设备用喷涂复合式电磁屏蔽材料

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Application publication date: 20160420