CN108059452A - 一种高磁导率软磁铁氧体材料及其制备方法 - Google Patents
一种高磁导率软磁铁氧体材料及其制备方法 Download PDFInfo
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Abstract
本发明公开一种高磁导率软磁铁氧体材料,包括如下组分:主料:Fe2O3:51.5~52.8mol%、MnO:25.8~27 mol%、ZnO:21.2~22 mol%;辅料:CaCO3:80~120ppm、Bi2O3:100~400ppm、CO2O3:100~350ppm、TiO2:50~150ppm、V2O5:30~120ppm、Nano‑SiO2:10~60ppm、Nano‑CaO:30~100ppm。本发明在辅料中加入超细粒度的Nano‑SiO2和Nano‑CaO,从辅料的角度出发增加各组分原料的反应活性,避免主料粒度过细发生团聚。本发明在烧结时充入SO3气体,是的原材料与SO3反应的更加充分,能够在提高磁导率的同时,降低损耗。
Description
技术领域
本发明属于软磁铁氧体材料领域,具体涉及一种高磁导率软磁铁氧体材料及其制备方法。
背景技术
软磁铁氧体是IT产业和电子工业的基础材料。工业化生产的软磁铁氧体材料目前主要分为:锰锌铁氧体、镍锌铁氧体和镁锌铁氧体三大类,其中产量最大的是锰锌铁氧体,锰锌铁氧体相较于其他铁氧体有鉄滞损耗地、起始磁导率大、距离温度高的优点,因此锰锌铁氧体被广泛应用于通讯、计算机、网络等电子信息产业领域,但随着这些产业的高速发展,市场对锰锌铁氧体材料性能要求越来越高。
发明内容
为了解决现有技术领域存在的问题,提高锰锌铁氧体的磁导率,降低锰锌铁氧体损耗,适应通讯行业,尤其是通讯变压器对软磁铁氧体的性能要求,本发明提出一种高磁导率软磁铁氧体材料,主要包括如下组分:
主料
Fe2O3:51.5~52.8mol%、MnO:25.8~27 mol%、ZnO:21.2~22 mol%。
辅料
CaCO3:80~120ppm、Bi2O3:100~400ppm、CO2O3:100~350ppm、TiO2:50~150ppm、V2O5:30~120ppm、Nano-SiO2:10~60ppm、Nano-CaO:30~100ppm。
本发明还提供上述一种高磁导率软磁铁氧体材料的制备方法,包括如下步骤:
(1)配料混合,将各组分按照上述配比配料,并放入单辊轴机中混合;
(2)预烧,在回转窑中进行预烧,预烧温度1000~1100℃,预烧时间:60~100min;
(3)粗粉碎,将预烧后的混合料放入球磨机粗粉粹20~40min;
(4)细粉碎,细粉碎利用砂磨机,粉磨30~60min;
(5)喷雾造粒:使用喷雾造粒机进行造粒;
(6)成型,将步骤(5)获得的粒料压制成型;
(7)烧结,升温区中致密去的温度为1000~1200℃,致密区充入SO3气体,保温3~5h,降温区1300~1000℃。
进一步地,所述步骤(7)中致密区还充入氮气和氧气的混合气体,其中氧气的体积百分比为0.3~0.5%。
优选地,所述Fe2O3为52.1 mol%。
优选地,所述MnO为26.2 mol%。
优选地,所述ZnO为22 mol%。
本发明的主要原理是:影响软磁铁氧体材料磁导率性能的主要因素的原材料的活性和纯度,细粒度的主料具有比表面积大的特点,能够增强其反应活性,在同样的工艺条件下能够获得优良磁铁特性的软磁铁氧体材料,然而过细的主料容易团聚,不利于混合均匀性以及粉末处理。基于以上原因,本发明在辅料中加入超细粒度的Nano-SiO2和Nano-CaO以增加各组分原料的反应活性。
此外,在配方中提高Zn的比例,有助于软磁铁氧体磁导率的提高,但是高Zn含量会降低软磁铁导体的距离温度,因此为了进一步提高软磁铁氧体材料的磁导率,掺杂是重要的手段,掺入SO3在有效提高磁导率的同时也能降低软磁铁氧体的损耗,在烧结时充入SO3气体,是的原材料与SO3反应的更加充分。
本发明的有益效果是:
1、本发明配方合理,能够有效提高软磁铁氧体的磁导率;
2、本发明在辅料中加入超细粒度的Nano-SiO2和Nano-CaO,从辅料的角度出发增加各组分原料的反应活性,避免主料粒度过细发生团聚;
3、在烧结时充入SO3气体,是的原材料与SO3反应的更加充分,能够在提高磁导率的同时,降低损耗。
具体实施方式
为了便于本领域技术人员理解,下面结合具体实施例对本发明作详细说明。
实施例1
一种高磁导率软磁铁氧体材料,主要包括如下组分:
主料
Fe2O3:51.5mol%、MnO:27mol%、ZnO:21.2 mol%。
辅料
CaCO3:80ppm、Bi2O3:400ppm、CO2O3:350ppm、TiO2:50ppm、V2O5:30ppm、Nano-SiO2:60ppm、Nano-CaO:100ppm。
一种高磁导率软磁铁氧体材料的制备方法,包括如下步骤:
(1)配料混合,将各组分按照上述配比配料,并放入单辊轴机中混合;
(2)预烧,在回转窑中进行预烧,预烧温度1000℃,预烧时间:60min;
(3)粗粉碎,将预烧后的混合料放入球磨机粗粉粹20min;
(4)细粉碎,细粉碎利用砂磨机,粉磨60min;
(5)喷雾造粒:使用喷雾造粒机进行造粒;
(6)成型,将步骤(5)获得的粒料压制成型;
(7)烧结,升温区中致密去的温度为1100℃,致密区充入SO3气体,保温3h,降温区1300~1000℃。
实施例2
一种高磁导率软磁铁氧体材料,主要包括如下组分:
主料
Fe2O3:52.8mol%、MnO:25.8mol%、ZnO:20 mol%。
辅料
CaCO3:120ppm、Bi2O3:100ppm、CO2O3:110ppm、TiO2:150ppm、V2O5:100ppm、Nano-SiO2:10ppm、Nano-CaO:30ppm。
一种高磁导率软磁铁氧体材料的制备方法,包括如下步骤:
(1)配料混合,将各组分按照上述配比配料,并放入单辊轴机中混合;
(2)预烧,在回转窑中进行预烧,预烧温度1100℃,预烧时间:80min;
(3)粗粉碎,将预烧后的混合料放入球磨机粗粉粹30min;
(4)细粉碎,细粉碎利用砂磨机,粉磨30min;
(5)喷雾造粒:使用喷雾造粒机进行造粒;
(6)成型,将步骤(5)获得的粒料压制成型;
(7)烧结,升温区中致密去的温度为1000℃,致密区充入SO3气体,以及氮气和氧气的混合气体,其中氧气的体积百分比0.3%,
保温4h,降温区1300~1000℃。
实施例3
一种高磁导率软磁铁氧体材料,主要包括如下组分:
主料
Fe2O3:为52.1 mol%、MnO:26.2 mol%、ZnO:22 mol%。
辅料
CaCO3:100ppm、Bi2O3:150ppm、CO2O3:260ppm、TiO2:80ppm、V2O5:120ppm、Nano-SiO2:50ppm、Nano-CaO:90ppm。
一种高磁导率软磁铁氧体材料的制备方法,包括如下步骤:
(1)配料混合,将各组分按照上述配比配料,并放入单辊轴机中混合;
(2)预烧,在回转窑中进行预烧,预烧温度1100℃,预烧时间:60~100min;
(3)粗粉碎,将预烧后的混合料放入球磨机粗粉粹40min;
(4)细粉碎,细粉碎利用砂磨机,粉磨30min;
(5)喷雾造粒:使用喷雾造粒机进行造粒;
(6)成型,将步骤(5)获得的粒料压制成型;
(7)烧结,升温区中致密去的温度为1200℃,致密区充入SO3气体以及氮气和氧气的混合气体,其中氧气的体积百分比为0.5%,
保温5h,降温区1300~1000℃。
上述实施例制得的软磁铁氧体材料的具体性能如下表所示:
由上表可以看出从初始磁导率、功率损耗、饱和磁通密度三个软磁材料的核心性能指标来衡量,按照本发明所述的配方和方法均能得到性能优异的软磁铁氧体材料,其中实施例3的各项性能指标最佳。
Claims (6)
1.一种高磁导率软磁铁氧体材料,其特征在于,包括如下组分:
主料:Fe2O3:51.5~52.8mol%、MnO:25.8~27 mol%、ZnO:21.2~22 mol%;辅料:CaCO3:80~120ppm、Bi2O3:100~400ppm、CO2O3:100~350ppm、TiO2:50~150ppm、V2O5:30~120ppm、Nano-SiO2:10~60ppm、Nano-CaO:30~100ppm。
2.如权利要求1所述的一种高磁导率软磁铁氧体材料的制备方法,其特征在于, 包括如下步骤:
(1)配料混合,将各组分按照上述配比配料,并放入单辊轴机中混合;
(2)预烧,在回转窑中进行预烧,预烧温度1000~1100℃,预烧时间:60~100min;
(3)粗粉碎,将预烧后的混合料放入球磨机粗粉粹20~40min;
(4)细粉碎,细粉碎利用砂磨机,粉磨30~60min;
(5)喷雾造粒:使用喷雾造粒机进行造粒;
(6)成型,将步骤(5)获得的粒料压制成型;
(7)烧结,升温区中致密去的温度为1000~1200℃,致密区充入SO3气体,保温3~5h,降温区1300~1000℃。
3.如权利要求2中所述的一种高磁导率软磁铁氧体材料的制备方法,其特征在于,所述步骤(7)中致密区还充入氮气和氧气的混合气体,其中氧气的体积百分比为0.3~0.5%。
4.Fe2O3为52.1 mol%。
5.如权利要求1所述的一种高磁导率软磁铁氧体材料,其特征在于,所述MnO为26.2mol%。
6.如权利要求1所述的一种高磁导率软磁铁氧体材料,其特征在于,所述ZnO为22mol%。
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