CN107032777A - 一种高磁导率镍锌软磁铁氧体材料及其制备方法 - Google Patents

一种高磁导率镍锌软磁铁氧体材料及其制备方法 Download PDF

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CN107032777A
CN107032777A CN201710212080.0A CN201710212080A CN107032777A CN 107032777 A CN107032777 A CN 107032777A CN 201710212080 A CN201710212080 A CN 201710212080A CN 107032777 A CN107032777 A CN 107032777A
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soft magnetic
temperature
dispensing
magnetic permeability
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熊泽英
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Yuanling Chenzhou Magnetoelectric Hi-Tech Co
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Abstract

一种高磁导率镍锌软磁铁氧体材料及其制备方法，主成分按摩尔份计包括：3.1‑3.3mol ZrO2、40‑42.5mol Fe3O4、9‑9.5molZnO、4‑4.5molMnO，主成分中添加的改性杂质按照占所述锌铜软磁铁氧体材料的重量计包括：310‑360ppm Al、560‑580ppmSr、210‑230ppmCuO、210‑280ppmGeO2；本发明具有高磁导率、低温度系数、低功耗的优点。

Description

一种高磁导率镍锌软磁铁氧体材料及其制备方法
技术领域
本发明涉及磁性材料技术领域，尤其涉及一种高磁导率镍锌软磁铁氧体材料及其制备方法。
背景技术
高磁导率镍锌铁氧体磁粉、磁芯是实现程控通讯、数字技术、网络通讯彩电等电子设备中用作电感器、滤波器、脉冲变压器等产品使其小型化、轻量化必不可少的电子材料，不断提高磁性材料中的磁通密度和磁导率，一直是从事该专业的工程技术人员和生产厂商的追求，且材料的性能指标，如损耗、频率特性、居里温度等都不尽人意。
发明内容
本发明的目的是为了克服现有技术的不足，提供一种高磁导率镍锌软磁铁氧体材料及其制备方法。
本发明是通过以下技术方案予以实现的：
一种高磁导率镍锌软磁铁氧体材料，其特征在于，主成分按摩尔份计包括： 3.1-3.3mol ZrO2、40-42.5mol Fe3O4、9-9.5molZnO、4-4.5molMnO，主成分中添加的改性杂质按照占所述锌铜软磁铁氧体材料的重量计包括：310-360ppm Al、560-580ppmSr、210-230ppmCuO、210-280ppmGeO2。
上述的一种高磁导率镍锌软磁铁氧体材料的制备方法，其特征在于，包括以下步骤：
（1）配料：将主成分进行配料，并添加改性杂质；
（2）一次烧结：以50-100℃/h的升温速度，将配料混合在810℃-860℃的条件下预烧2-3h，得预烧料；
（3）砂磨：将预烧料放入砂磨机中，同时加入相当于配料1.0-1.3wt%聚乙烯醇进行砂磨110-150分钟，得浆料，并烘干；
（4）将烘干的粉料加入1.5-1.9wt%的聚乙烯醇、0.4-0.5wt%的硬脂酸，造粒，装入模具，在85-100MPa压力下压制成坯件，自然晾干；
（5）二次烧结：将磁芯毛坯放入氮气保护的隧道烧结窑内烧结，以260-300℃/h的升温速度升至1000-1050℃时，恒温烧结1-2h后，然后进行降温，将温度降至850-900℃时，进行恒温保温20-50min后，然后进行二次降温烧结，将温度降至700-800℃时，恒温烧结3-4h后，最后以110-160℃/h的降温速率降温至室温。
进一步的，所述步骤（3）中，在预烧料放入砂磨机之前，先对预烧料进行混合、造粒，以900～1100℃对所得的造粒物进行一次煅烧后，接着进行压碎、分级。
本发明的二次烧结在高温区采用二段式升温烧结和降温恒温烧结，可以达到匀化、并增大镍锌铁氧体材料内部晶粒，有利于提高镍锌铁氧体材料的磁导率；由该烧结方法烧结得到的镍锌铁氧体材料，在频率为8-11KHz时，初始磁导率可以达到26000-35000H/m；并且在预烧料放入砂磨机之前，先对预烧料进行混合、造粒，以900～1100℃对所得的造粒物进行一次煅烧后，接着进行压碎、分级，从而可以克服现有技术中磁导率低的缺陷，以实现高磁导率、低功耗、高磁通密度、低温度系数的特性，满足高频电路的需求。
具体实施方式
一种高磁导率镍锌软磁铁氧体材料，主成分按摩尔份计包括： 3.1-3.3mol ZrO2、40-42.5mol Fe3O4、9-9.5molZnO、4-4.5molMnO，主成分中添加的改性杂质按照占所述锌铜软磁铁氧体材料的重量计包括：310-360ppm Al、560-580ppmSr、210-230ppmCuO、210-280ppmGeO2。
上述一种高磁导率镍锌软磁铁氧体材料的制备方法，包括以下步骤：
（1）配料：将主成分进行配料，并添加改性杂质；
（2）一次烧结：以50-100℃/h的升温速度，将配料混合在810℃-860℃的条件下预烧2-3h，得预烧料；
（3）砂磨：在预烧料放入砂磨机之前，先对预烧料进行混合、造粒，以900～1100℃对所得的造粒物进行一次煅烧后，接着进行压碎、分级。将分级后的预烧料放入砂磨机中，同时加入相当于配料1.0-1.3wt%聚乙烯醇进行砂磨110-150分钟，得浆料，并烘干；
（4）将烘干的粉料加入1.5-1.9wt%的聚乙烯醇、0.4-0.5wt%的硬脂酸，造粒，装入模具，在85-100MPa压力下压制成坯件，自然晾干；
（5）二次烧结：将磁芯毛坯放入氮气保护的隧道烧结窑内烧结，以260-300℃/h的升温速度升至1000-1050℃时，恒温烧结1-2h后，然后进行降温，将温度降至850-900℃时，进行恒温保温20-50min后，然后进行二次降温烧结，将温度降至700-800℃时，恒温烧结3-4h后，最后以110-160℃/h的降温速率降温至室温。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。

Claims (3)

1.一种高磁导率镍锌软磁铁氧体材料，其特征在于，主成分按摩尔份计包括： 3.1-3.3mol ZrO2、40-42.5mol Fe3O4、9-9.5molZnO、4-4.5molMnO，主成分中添加的改性杂质按照占所述锌铜软磁铁氧体材料的重量计包括：310-360ppm Al、560-580ppmSr、210-230ppmCuO、210-280ppmGeO2。
2.根据权利要求1所述的一种高磁导率镍锌软磁铁氧体材料的制备方法，其特征在于，包括以下步骤：
（1）配料：将主成分进行配料，并添加改性杂质；
（2）一次烧结：以50-100℃/h的升温速度，将配料混合在810℃-860℃的条件下预烧2-3h，得预烧料；
（3）砂磨：将预烧料放入砂磨机中，同时加入相当于配料1.0-1.3wt%聚乙烯醇进行砂磨110-150分钟，得浆料，并烘干；
（4）将烘干的粉料加入1.5-1.9wt%的聚乙烯醇、0.4-0.5wt%的硬脂酸，造粒，装入模具，在85-100MPa压力下压制成坯件，自然晾干；
（5）二次烧结：将磁芯毛坯放入氮气保护的隧道烧结窑内烧结，以260-300℃/h的升温速度升至1000-1050℃时，恒温烧结1-2h后，然后进行降温，将温度降至850-900℃时，进行恒温保温20-50min后，然后进行二次降温烧结，将温度降至700-800℃时，恒温烧结3-4h后，最后以110-160℃/h的降温速率降温至室温。
3.根据权利要求2所述的一种高磁导率镍锌软磁铁氧体材料的制备方法，其特征在于：所述步骤（3）中，在预烧料放入砂磨机之前，先对预烧料进行混合、造粒，以900～1100℃对所得的造粒物进行一次煅烧后，接着进行压碎、分级。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08151257A (ja) * 1994-11-28 1996-06-11 Taiyo Yuden Co Ltd 酸化物磁性材料
CN1587193A (zh) * 2004-08-19 2005-03-02 浙江大学 低温度系数、低损耗和高饱和磁通密度铁氧体材料及制备方法
CN102329129A (zh) * 2011-06-20 2012-01-25 南京金宁三环富士电气有限公司 一种平板显示用高表面电阻镍铜锌铁氧体材料
CN103382109A (zh) * 2013-06-26 2013-11-06 蚌埠市高华电子有限公司 一种镍锌软磁铁氧体材料及其制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08151257A (ja) * 1994-11-28 1996-06-11 Taiyo Yuden Co Ltd 酸化物磁性材料
CN1587193A (zh) * 2004-08-19 2005-03-02 浙江大学 低温度系数、低损耗和高饱和磁通密度铁氧体材料及制备方法
CN102329129A (zh) * 2011-06-20 2012-01-25 南京金宁三环富士电气有限公司 一种平板显示用高表面电阻镍铜锌铁氧体材料
CN103382109A (zh) * 2013-06-26 2013-11-06 蚌埠市高华电子有限公司 一种镍锌软磁铁氧体材料及其制备方法

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