CN111099890A - 一种大功率镍锌软磁铁氧体材料及其制备方法 - Google Patents

一种大功率镍锌软磁铁氧体材料及其制备方法 Download PDF

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CN111099890A
CN111099890A CN201911422018.XA CN201911422018A CN111099890A CN 111099890 A CN111099890 A CN 111099890A CN 201911422018 A CN201911422018 A CN 201911422018A CN 111099890 A CN111099890 A CN 111099890A
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ferrite material
magnetic ferrite
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瞿德林
沈建元
王久如
王晓祥
李丛俊
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Zhongde Electronics Co ltd
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Abstract

本发明公开了一种大功率镍锌软磁铁氧体材料及其制备方法,其制备方法包括以下步骤:S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,将主料经过一次球磨后烘干,经过预烧处理、破碎得到预烧料;S2、将CuO、V205、MoO3、CoC2O4、Gd2O3混合均匀,得到辅料,将辅料与预烧料混合均匀,经过二次球磨后烘干,得到混合料;S3、将混合料与聚乙烯醇水溶液混合均匀,得到混合浆料;S4、将混合浆料在微波条件下进行搅拌处理,然后喷雾造粒,得到颗粒料;S5、将颗粒料压制成型,然后高温烧结,冷却后得到铁氧体材料。本发明制备的镍锌软磁铁氧体材料具有高饱和磁感应强度、低功率损耗,适合在高频大功率状态下应用。

Description

一种大功率镍锌软磁铁氧体材料及其制备方法
技术领域
本发明涉及铁氧体材料技术领域,尤其涉及一种大功率镍锌软磁铁氧体材料及其制备方法。
背景技术
软磁铁氧体是一种广泛应用于航天航空、电子、家电、汽车、采矿及军工等领域的磁性材料,主要用于通讯、传感、音像设备,以及滤波器、变压器等电子设备中。随着电子信息的发展,电子元器件趋向于高密度化、轻量化、薄型化,对软磁铁氧体材料的性能提出了更高的要求。镍锌系铁氧体材料由于具有多孔性以及高电阻率的特点,因此成为在高频大功率应用中性能最好的软磁铁氧体材料。但是,目前的镍锌软磁铁氧体材料在饱和磁化强度、功率损耗等性能方面仍然存在不足,开发具有高性能的大功率镍锌软磁铁氧体材料具有重要意义。
发明内容
基于背景技术存在的技术问题,本发明提出了一种大功率镍锌软磁铁氧体材料及其制备方法。
本发明提出的一种大功率镍锌软磁铁氧体材料的制备方法,包括以下步骤:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,将所述主料经过一次球磨后烘干,经过预烧处理、破碎,得到预烧料;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料;
S3、将所述混合料与聚乙烯醇水溶液混合均匀,得到混合浆料;
S4、将所述混合浆料在微波条件下进行搅拌处理,然后喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后高温烧结,冷却后得到铁氧体材料。
优选地,所述步骤S4中,在微波条件下进行搅拌处理的条件为:300-800W,10-20min,搅拌转速为500-1000r/min。
优选地,所述步骤S4中,在微波条件下进行搅拌处理的条件为:先在300-400W条件下搅拌处理3-5min,然后在500-600W条件下搅拌处理6-8min,最后在700-800W条件下搅拌处理1-2min,搅拌转速为500-1000r/min。
优选地,所述主料中,按摩尔百分比计,Fe2O3为48.5-50.5%、NiO为18-22%、余量为ZnO。
优选地,所述辅料中,CuO、V205、MoO3、CoC2O4、Gd2O3的摩尔比为(0.06-0.08):(0.15-0.2):(0.4-0.6):(0.02-0.03):(0.02-0.03)。
优选地,所述主料与辅料的质量比为(99.5-99.8):(0.2-0.5)。
优选地,所述混合料与聚乙烯醇水溶液的质量比为100:(7.5-8),所述聚乙烯醇水溶液的质量分数为8-10%。
优选地,所述一次球磨的时间为6-10h,所述二次球磨的时间为12-16h。
优选地,所述预烧处理的温度为850-900℃,所述高温烧结的温度为1250-1300℃。
一种大功率镍锌软磁铁氧体材料,其特征在于,由所述的制备方法制得。
本发明的有益效果如下:
本发明的制备工艺在喷雾造粒之前,将主要原料与粘结剂形成的浆料在微波条件下进行搅拌预处理,通过微波功率、搅拌转速与处理时间的优化,使浆料中的无机粉体以及聚乙烯醇得到激活,无机粉体与聚乙烯醇之间的相互作用得到增强,使得喷雾造粒后能形成更为均匀、表面性能更好的颗粒,有利于减少粘结剂的用量,在烧结时生成的气孔小且均匀分布,气孔率低,晶粒细小均匀,从而有效提高材料的饱和磁感应强度,降低材料的功率损耗。
本发明的原料中,通过选择合适的配比,以及采用CuO、V205、MoO3、CoC2O4、Gd2O3复配作为辅料,其中CuO能形成液相烧结,降低烧结温度,V205、MoO3能够形成玻璃相掺杂,阻碍晶界移动,防止晶粒异常长大,使材料的结构细化、均匀化,提高材料的饱和磁感应强度,CoC2O4能增大晶格常数和晶格磁矩,提高材料的饱和磁感应强度,降低介电损耗,Gd2O3能够增大晶格常数,阻碍畴壁移动,降低介电损耗和磁损耗。通过上述工艺与原料的配合,本发明制备的镍锌软磁铁氧体材料具有高饱和磁感应强度、低功率损耗,适合在高频大功率状态下应用。
具体实施方式
下面,通过具体实施例对本发明的技术方案进行详细说明。
实施例1
一种大功率镍锌软磁铁氧体材料的制备方法,包括以下步骤:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,其中按摩尔百分比计,Fe2O3为50.5%、NiO为18%、余量为ZnO;将所述主料经过一次球磨后烘干,在850℃进行预烧处理,破碎,得到预烧料,一次球磨的时间为6-10h;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3按摩尔比0.06:0.15:0.4:0.02:0.02混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料,主料与辅料的质量比为99.5:0.5,二次球磨的时间为12h;
S3、将所述混合料与质量分数为8%的聚乙烯醇水溶液混合均匀,得到混合浆料,混合料与聚乙烯醇水溶液的质量比为100:7.5;
S4、将所述混合浆料在300W的微波条件下搅拌20min,搅拌转速为1000r/min,然后喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后在1250℃进行高温烧结,冷却后得到铁氧体材料。
实施例2
一种大功率镍锌软磁铁氧体材料的制备方法,包括以下步骤:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,其中按摩尔百分比计,Fe2O3为48.5%、NiO为22%、余量为ZnO;将所述主料经过一次球磨后烘干,在900℃进行预烧处理,破碎,得到预烧料,一次球磨的时间为6-10h;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3按摩尔比0.08:0.2):0.6:0.03:0.03混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料,主料与辅料的质量比为99.8:0.2,二次球磨的时间为16h;
S3、将所述混合料与质量分数为10%的聚乙烯醇水溶液混合均匀,得到混合浆料,混合料与聚乙烯醇水溶液的质量比为100:8;
S4、将所述混合浆料在800W的微波条件下搅拌10min,搅拌转速为500r/min,然后喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后在1300℃进行高温烧结,冷却后得到铁氧体材料。
实施例3
一种大功率镍锌软磁铁氧体材料的制备方法,包括以下步骤:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,其中按摩尔百分比计,Fe2O3为50%、NiO为20%、余量为ZnO;将所述主料经过一次球磨后烘干,在880℃进行预烧处理,破碎,得到预烧料,一次球磨的时间为8h;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3按摩尔比0.075:0.15:0.5:0.025:0.025混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料,主料与辅料的质量比为99.6:0.4,二次球磨的时间为15h;
S3、将所述混合料与质量分数为10%的聚乙烯醇水溶液混合均匀,得到混合浆料,混合料与聚乙烯醇水溶液的质量比为100:7.5;
S4、将所述混合浆料在500W的微波条件下搅拌15min,搅拌转速为8000r/min,然后喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后在1275℃进行高温烧结,冷却后得到铁氧体材料。
实施例4
一种大功率镍锌软磁铁氧体材料的制备方法,包括以下步骤:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,其中按摩尔百分比计,Fe2O3为50%、NiO为20%、余量为ZnO;将所述主料经过一次球磨后烘干,在880℃进行预烧处理,破碎,得到预烧料,一次球磨的时间为8h;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3按摩尔比0.075:0.15:0.5:0.025:0.025混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料,主料与辅料的质量比为99.6:0.4,二次球磨的时间为15h;
S3、将所述混合料与质量分数为10%的聚乙烯醇水溶液混合均匀,得到混合浆料,混合料与聚乙烯醇水溶液的质量比为100:7.5;
S4、将所述混合浆料先在350W微波条件下搅拌处理4min,然后在550W微波条件下搅拌处理7min,最后在750W微波条件下搅拌处理1min,搅拌转速为800r/min,然后喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后在1275℃进行高温烧结,冷却后得到铁氧体材料。
对比例1
一种镍锌软磁铁氧体材料的制备方法,包括以下步骤:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,其中按摩尔百分比计,Fe2O3为50%、NiO为20%、余量为ZnO;将所述主料经过一次球磨后烘干,在880℃进行预烧处理,破碎,得到预烧料,一次球磨的时间为8h;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3按摩尔比0.075:0.15:0.5:0.025:0.025混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料,主料与辅料的质量比为99.6:0.4,二次球磨的时间为15h;
S3、将所述混合料与质量分数为10%的聚乙烯醇水溶液混合均匀,得到混合浆料,混合料与聚乙烯醇水溶液的质量比为100:7.5;
S4、将所述混合浆料喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后在1275℃进行高温烧结,冷却后得到铁氧体材料。
试验例
将实施例3-4制得的铁氧体材料进行性能测试,测试结果如表1所示:
表1铁氧体材料的性能测试结果
项目 单位 测试条件 实施例3 实施例4 对比例1
Bs mT 1.2kA/m,100±3℃ 462 479 443
P<sub>cv</sub> mw/cm<sup>3</sup> 2MHz,10mT,100±3℃ 68 62 104
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,根据本发明的技术方案及其发明构思加以等同替换或改变,都应涵盖在本发明的保护范围之内。

Claims (10)

1.一种大功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:
S1、将Fe2O3、NiO、ZnO混合均匀,得到主料,将所述主料经过一次球磨后烘干,经过预烧处理、破碎,得到预烧料;
S2、将CuO、V205、MoO3、CoC2O4、Gd2O3混合均匀,得到辅料,将所述辅料与所述预烧料混合均匀,经过二次球磨后烘干,得到混合料;
S3、将所述混合料与聚乙烯醇水溶液混合均匀,得到混合浆料;
S4、将所述混合浆料在微波条件下进行搅拌处理,然后喷雾造粒,得到颗粒料;
S5、将所述颗粒料压制成型,然后高温烧结,冷却后得到铁氧体材料。
2.根据权利要求1所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述步骤S4中,在微波条件下进行搅拌处理的条件为:300-800W,10-20min,搅拌转速为500-1000r/min。
3.根据权利要求1所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述步骤S4中,在微波条件下进行搅拌处理的条件为:先在300-400W条件下搅拌处理3-5min,然后在500-600W条件下搅拌处理6-8min,最后在700-800W条件下搅拌处理1-2min,搅拌转速为500-1000r/min。
4.根据权利要求1-3任一项所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述主料中,按摩尔百分比计,Fe2O3为48.5-50.5%、NiO为18-22%、余量为ZnO。
5.根据权利要求1-4任一项所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述辅料中,CuO、V205、MoO3、CoC2O4、Gd2O3的摩尔比为(0.06-0.08):(0.15-0.2):(0.4-0.6):(0.02-0.03):(0.02-0.03)。
6.根据权利要求1-5任一项所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述主料与辅料的质量比为(99.5-99.8):(0.2-0.5)。
7.根据权利要求1-6任一项所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述混合料与聚乙烯醇水溶液的质量比为100:(7.5-8),所述聚乙烯醇水溶液的质量分数为8-10%。
8.根据权利要求1-7任一项所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述一次球磨的时间为6-10h,所述二次球磨的时间为12-16h。
9.根据权利要求1-8任一项所述的大功率镍锌软磁铁氧体材料的制备方法,其特征在于,所述预烧处理的温度为850-900℃,所述高温烧结的温度为1250-1300℃。
10.一种大功率镍锌软磁铁氧体材料,其特征在于,由权利要求1-9任一项所述的制备方法制得。
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