CN106587979B - 一种高磁导率低损耗MnZn铁氧体材料及其制备方法 - Google Patents
一种高磁导率低损耗MnZn铁氧体材料及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种高磁导率低损耗MnZn铁氧体材料,由主料和辅料制成,所述主料以摩尔百分比计由以下组分组成:52~53mol%Fe2O3,18.5~19.5mol%ZnO,余量为MnO,所述辅料以主料总重量计由以下质量百分含量的组分组成:0.03~0.05wt%CaCO3,0.01~0.03wt%Nb2O5,0.01~0.03wt%ZrO2。本发明的MnZn铁氧体材料具有高磁导率的同时具有较低的损耗。本发明还公开了一种高磁导率低损耗MnZn铁氧体材料制备方法,包括以下步骤:(1)配料;(2)预烧;(3)二次砂磨;(4)喷雾造粒和成型;(5)烧结。本发明制备方法步骤简单,可操作性强,适合工业化生产。
Description
技术领域
本发明涉及软磁铁氧体技术领域,尤其是涉及一种高磁导率低损耗MnZn铁氧体材料及其制备方法。
背景技术
现有可穿戴设备的功率都比较小,所以利用MnZn铁氧体材料的高磁导率,可以有效减少铜线绕组的同时具有相同的性能,来实现轻量化的目的。但是目前常规的MnZn铁氧体材料无法同时满足高磁导率(5000±20%),低损耗(Pcv[60℃]<330kW/m3@100KHz,200mT)的性能,使其在可穿戴设备中的应用受到了限制。因此有必要开发一种在具有高磁导率的同时具有较低的损耗的MnZn铁氧体材料。
发明内容
本发明是为了解决现有技术的MnZn铁氧体材料无法在具有高磁导率(的同时具有低损耗的问题,提供了一种组分合理,
为了实现上述目的,本发明采用以下技术方案:
一种高磁导率低损耗MnZn铁氧体材料,其由主料和辅料制成,所述主料以摩尔百分比计由以下组分组成:52~53mol%Fe2O3,18.5~19.5mol%ZnO,余量为MnO,以主料总重量计,所述辅料由以下质量百分含量的组分组成:0.03~0.05wt%CaCO3,0.01~0.03wt%Nb2O5,0.01~0.03wt%ZrO2。本发明对MnZn铁氧体材料的具体成分配比进行了优化调整,限定了主料和辅料的具体组分种类和含量,使得MnZn铁氧体材料具有高磁导率的同时具有较低的损耗。
一种高磁导率低损耗MnZn铁氧体材料制备方法,包括以下步骤:
(1)配料:按上述配比称取主料和辅料后,在主料中加入去离子水进行一次砂磨,喷雾干燥后得喷物料。
(2)预烧:将喷物料放入预烧炉中进行预烧,得预烧料。
(3)二次砂磨:在预烧料中加入辅料后,加去离子水进行二次砂磨,得二次砂磨料。
(4)喷雾造粒和成型:在二次砂磨料中加入为二次砂磨料质量0.06~0.08%PVA及0.002~0.004%消泡剂,进行喷雾造粒后成型,得环毛坯。
(5)烧结:将环毛坯置于氧化性气氛中进行烧结,得高磁导率低损耗MnZn铁氧体材料样环。
作为优选,步骤(1)中,一次砂磨时间为10~40min;
作为优选,步骤(2)中,预烧温度为800~900℃,预烧时间2~4h。
作为优选,步骤(3)中,二次砂磨时间为90~120min。
作为优选,步骤(4)中,喷雾造粒的物料粒径为50~200μm。
作为优选,步骤(5)中,氧化性气氛为空气,烧结曲线为:升温速度3~4℃/min;最高温度为1280~1320℃,保温3~4h,氧气浓度1~3%;降温到850~900℃,降温速度为1~2℃/min,按照平衡氧气浓度设定;降温到常温,降温速度为3~4℃/min,氮气。
因此,本发明具有如下有益效果:
(1)对MnZn铁氧体材料的具体成分配比进行了优化调整,限定了主料和辅料的具体组分种类和含量,使得MnZn铁氧体材料具有高磁导率的同时具有较低的损耗,具有较大的推广应用价值;
(2)制备方法步骤简单,可操作性强,适合工业化生产。
具体实施方式
下面通过具体实施方式对本发明做进一步的描述。
实施例1
(1)配料:按53mol%Fe2O3,19.5mol%ZnO,余量为MnO的摩尔百分比配比称量各组分作为主料,以主料总重量计,按0.05wt%CaCO3,0.03wt%Nb2O5,0.03wt%ZrO2的质量百分含量配比称取各组分作为辅料,在主料中加入去离子水进行一次砂磨,砂磨时间为40min,喷雾干燥后得喷物料;
(2)预烧:将喷物料放入预烧炉中进行预烧,得预烧料,预烧温度为900℃,预烧时间2h;
(3)二次砂磨:在预烧料中加入辅料后,加去离子水进行二次砂磨,二次砂磨时间为120min,得二次砂磨料;
(4)喷雾造粒和成型:在二次砂磨料中加入为二次砂磨料质量0.08%PVA及0.004%消泡剂,进行喷雾造粒后成型,喷雾造粒的物料粒径为200μm,得环毛坯;
(5)烧结:将环毛坯置于氧化性气氛中进行烧结,得高磁导率低损耗MnZn铁氧体材料样环,氧化性气氛为空气,烧结曲线为:升温速度4℃/min;最高温度为1320℃,保温4h,氧气浓度3%;降温到900℃,降温速度为2℃/min,按照平衡氧气浓度设定;降温到常温,降温速度为4℃/min,氮气。
将烧结好的样环用CH3302测试磁导率,用日本岩崎公司的SY8218仪器进行功耗Pcv及饱和磁通密度Bs的测试。测得的性能如下:
μi[25℃]=5523;
Bs[25℃]=470mT,Bs[60℃]=401mT;
Pcv[25℃]=367kW/m3,Pcv[60℃]=329kW/m3(@100KHz,200mT);
Pcv[25℃]=302kW/m3,Pcv[60℃]=288kW/m3(@500KHz,50mT);
Pcv[25℃]=433kW/m3,Pcv[60℃]=417kW/m3(@1MHz,30mT)。
实施例2
(1)配料:按52mol%Fe2O3,18.5mol%ZnO,余量为MnO的摩尔百分比配比称量各组分作为主料,以主料总重量计,按0.03wt%CaCO3,0.01wt%Nb2O5,0.01wt%ZrO2的质量百分含量配比称取各组分作为辅料,在主料中加入去离子水进行一次砂磨,砂磨时间为10min,喷雾干燥后得喷物料;
(2)预烧:将喷物料放入预烧炉中进行预烧,得预烧料,预烧温度为800℃,预烧时间4h;
(3)二次砂磨:在预烧料中加入辅料后,加去离子水进行二次砂磨,二次砂磨时间为90min,得二次砂磨料;
(4)喷雾造粒和成型:在二次砂磨料中加入为二次砂磨料质量0.06%PVA及0.002%消泡剂,进行喷雾造粒后成型,喷雾造粒的物料粒径为50~200μm,得环毛坯;
(5)烧结:将环毛坯置于氧化性气氛中进行烧结,得高磁导率低损耗MnZn铁氧体材料样环,氧化性气氛为空气,烧结曲线为:升温速度3℃/min;最高温度为1280℃,保温3h,氧气浓度1%;降温到850℃,降温速度为1℃/min,按照平衡氧气浓度设定;降温到常温,降温速度为3℃/min,氮气。
将烧结好的样环用CH3302测试磁导率,用日本岩崎公司的SY8218仪器进行功耗Pcv及饱和磁通密度Bs的测试。测得的性能如下:
μi[25℃]=5523;
Bs[25℃]=470mT,Bs[60℃]=401mT;
Pcv[25℃]=367kW/m3,Pcv[60℃]=329kW/m3(@100KHz,200mT);
Pcv[25℃]=302kW/m3,Pcv[60℃]=288kW/m3(@500KHz,50mT);
Pcv[25℃]=433kW/m3,Pcv[60℃]=417kW/m3(@1MHz,30mT)。
实施例3
(1)配料:按52.5mol%Fe2O3,19mol%ZnO,余量为MnO的摩尔百分比配比称量各组分作为主料,以主料总重量计,按0.04wt%CaCO3,0.02wt%Nb2O5,0.02wt%ZrO2的质量百分含量配比称取各组分作为辅料,在主料中加入去离子水进行一次砂磨,砂磨时间为20min,喷雾干燥后得喷物料;
(2)预烧:将喷物料放入预烧炉中进行预烧,得预烧料,预烧温度为850℃,预烧时间3h;
(3)二次砂磨:在预烧料中加入辅料后,加去离子水进行二次砂磨,二次砂磨时间为100min,得二次砂磨料;
(4)喷雾造粒和成型:在二次砂磨料中加入为二次砂磨料质量0.07%PVA及0.003%消泡剂,进行喷雾造粒后成型,喷雾造粒的物料粒径为100μm,得环毛坯;
(5)烧结:将环毛坯置于氧化性气氛中进行烧结,得高磁导率低损耗MnZn铁氧体材料样环,氧化性气氛为空气,烧结曲线为:升温速度3.5℃/min;最高温度为1305℃,保温3.5h,氧气浓度2%;降温到870℃,降温速度为1.5℃/min,按照平衡氧气浓度设定;降温到常温,降温速度为3.5℃/min,氮气。
将烧结好的样环用CH3302测试磁导率,用日本岩崎公司的SY8218仪器进行功耗Pcv及饱和磁通密度Bs的测试。测得的性能如下:
μi[25℃]=5523;
Bs[25℃]=470mT,Bs[60℃]=401mT;
Pcv[25℃]=367kW/m3,Pcv[60℃]=329kW/m3(@100KHz,200mT);
Pcv[25℃]=302kW/m3,Pcv[60℃]=288kW/m3(@500KHz,50mT);
Pcv[25℃]=433kW/m3,Pcv[60℃]=417kW/m3(@1MHz,30mT)。
以上所述的实施例只是本发明的一种较佳的方案,并非对本发明作任何形式上的限制,在不超出权利要求所记载的技术方案的前提下还有其它的变体及改型。
Claims (4)
1.一种高磁导率低损耗MnZn铁氧体材料,其由主料和辅料制成,其特征在于,所述主料以摩尔百分比计由以下组分组成:52~53mol%Fe2O3,18.5~19.5mol%ZnO,余量为MnO,以主料总重量计,所述辅料由以下质量百分含量的组分组成:0.03~0.05wt%CaCO3,0.01~0.03wt%Nb2O5,0.01~0.03wt%ZrO2;
所述高磁导率低损耗MnZn铁氧体材料制备方法,包括以下步骤:
(1)配料:按上述配比称取主料和辅料后,在主料中加入去离子水进行一次砂磨,喷雾干燥后得喷雾料;
(2)预烧:将喷雾料放入预烧炉中进行预烧,得预烧料;
(3)二次砂磨:在预烧料中加入辅料后,加去离子水进行二次砂磨,得二次砂磨料;
(4)喷雾造粒和成型:在二次砂磨料中加入为二次砂磨料质量0.06~0.08%PVA及0.002~0.004%消泡剂,进行喷雾造粒后成型,得环毛坯;喷雾造粒的物料粒径为50~200μm;
(5)烧结:将环毛坯置于氧化性气氛中进行烧结,得高磁导率低损耗MnZn铁氧体材料样环;所述氧化性气氛为空气,烧结曲线为:升温速度3~4℃/min;最高温度为1280~1320℃,保温3~4h,氧气浓度1~3%;降温到850~900℃,降温速度为1~2℃/min,按照平衡氧气浓度设定;降温到常温,降温速度为3~4℃/min,氮气。
2.根据权利要求1所述的高磁导率低损耗MnZn铁氧体材料制备方法,其特征在于,步骤(1)中,一次砂磨时间为10~40min。
3.根据权利要求1所述的高磁导率低损耗MnZn铁氧体材料制备方法,其特征在于,步骤(2)中,预烧温度为800~900℃,预烧时间2~4h。
4.根据权利要求1所述的高磁导率低损耗MnZn铁氧体材料制备方法,其特征在于,步骤(3)中,二次砂磨时间为90~120min。
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