CN111960815A - 一种微波旋磁铁氧体材料及其制备工艺和用途 - Google Patents

一种微波旋磁铁氧体材料及其制备工艺和用途 Download PDF

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CN111960815A
CN111960815A CN202010858614.9A CN202010858614A CN111960815A CN 111960815 A CN111960815 A CN 111960815A CN 202010858614 A CN202010858614 A CN 202010858614A CN 111960815 A CN111960815 A CN 111960815A
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ferrite material
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马学龙
李慧勇
顾春健
杨宋兵
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Shanghai Hexu Microwave Technology Co ltd
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Abstract

本发明提供了一种微波旋磁铁氧体材料及其制备工艺,其特征在于,由如下摩尔比的组分制造而成:VIII系金属的氧化物中的一种或几种40‑75;IIIB系金属的氧化物中的一种或几种20‑50;镧系金属的氧化物中的一种或几种1‑10;IVB系金属的氧化物中的一种或几种1‑10;VIIB系金属的氧化物中的一种或几种1‑10。本发明生产的旋磁铁氧体材料,具有高饱和磁化强度,高居里温度,低损耗,性能一致性好,适合批量生产。

Description

一种微波旋磁铁氧体材料及其制备工艺和用途
技术领域
本发明涉及一种通信材料领域,具体地,涉及一种微波旋磁铁氧体材料及其制备工艺和用途,更具体地,涉及一种6GHz环形器的微波旋磁铁氧体材料及其制备工艺。
背景技术
微波铁氧体环形器是5G通讯中不可缺少的基本器件,主要应用是在基台(站)和移动台系统中。随着移动通信技术的不断发展,移动通信对环形器的基本要求则是低插入损耗、高隔离度、高回波、较高功率及高的温度稳定性等、小型轻量、低成本。旋磁铁氧体是环形器的关键材料,应具有稳定的饱和磁化强度,高居里温度,窄线宽,高介电常数,低损耗。
然而,现有的环形器中的旋磁铁氧体性能稳定性差,生产周期长,批量生产困难,难以满足5G通信产品的需求。
发明内容
本发明旨在克服上述缺陷,提供一种特别适合于6GHz环形器的微波旋磁铁氧体材料。
本发明提供了一种微波旋磁铁氧体材料,其特征在于,由如下摩尔比的组分制造而成:
Figure BDA0002647361340000011
Figure BDA0002647361340000021
进一步,本发明提供的一种微波旋磁铁氧体材料,其特征还在于:上述VI I I系金属的氧化物选自铁的氧化物;
和/或
上述IIIB系金属的氧化物选自钇的氧化物;
和/或
上述镧系金属的氧化物选自钆的氧化物;
和/或
上述IVB系金属的氧化物选自锆的氧化物;
和/或
上述VIIB系金属的氧化物选自锰的氧化物。
进一步,本发明提供的一种微波旋磁铁氧体材料,其特征还在于:上述镧系金属的氧化物:IVB系金属的氧化物:VIIB系金属的氧化物的比例为1:1:1。
进一步,本发明提供的一种微波旋磁铁氧体材料,其特征还在于,由如下摩尔比的组分制造而成:
Figure BDA0002647361340000022
进一步地,本发明提供的一种微波旋磁铁氧体材料的制造方法,其特征还在于:包括至少两次的砂磨造粒工序。
另外,本发明还提供了一种微波旋磁铁氧体材料的制造方法,其特征在于:具体工艺步骤如下所示:
S1.配料;
S2.第一次砂磨;
S3.第一次喷雾造粒;
S4.预烧;
S5.第二次砂磨;
S6.第二次喷雾造粒;
S7.压型;
S8.烧结。
进一步地,本发明提供的一种微波旋磁铁氧体材料的制造方法,其特征还在于:上述砂磨过程中,钢球:原材料:去离子水的比例为3.3:1:0.4-1.2,以80-200转/min的转速,进行砂磨40-250min;
其中,上述第一次砂磨的过程中,所使用的去离子水的量大于第二次砂磨的过程;
上述第二次砂磨的过程中,所采用的砂磨转速大于第一次砂磨的过程;
上述第二次砂磨的过程中,砂磨时间大于第一次砂磨的过程。
进一步地,本发明提供的一种微波旋磁铁氧体材料的制造方法,其特征还在于:上述喷雾造粒过程中,向砂磨后的浆料中加入胶水,上述胶水与浆料的质量比为1:5-20;
上述浆料的固含量不小于50%;
上述第二次喷雾造粒的过程中,浆料的固含量大于第一次喷雾造粒的过程;
上述第二次喷雾造粒的过程中还包括过筛工艺。
进一步地,本发明提供的一种微波旋磁铁氧体材料的制造方法,其特征还在于:上述预烧的工艺条件为:烧结温度1000-1300℃,保温时间60-200min;
上述压型后产品的生坯密度不低于3.5g/cm3;
上述烧结的工艺为曲线烧结。
进一步地,本发明提供的一种微波旋磁铁氧体材料的制造方法,其特征还在于:所述烧结的具体工艺条件为:
Figure BDA0002647361340000041
此外,本发明提供的一种微波旋磁铁氧体材料,其特征在于,具有如下至少一种的用途;
用途A.用于制造通信产品的组件/配件;
用途B.用于制造环形器;
用途C.用于制造隔离器;
用途D.用于制造6GHz环形器。
本发明的作用和效果:
本发明通过调整料、钢球、水配比,两次砂磨两次喷雾造粒,能够缩短生产时间,通过工艺控制保证配方稳定性,来保证材料性能。和现有技术比较,通过调整料、钢球、水配比,缩短砂磨时间短,采用两次喷雾造粒,代替烘干、破碎、加胶造粒三个过程,从而缩短生产周期,保证配方准确性,从而保证材料性能。烧结工艺曲线和每个温度段,氧含量比例也是不同的。此外,还通过材料配比和工艺,来克服现有材料中的缺陷。
上述工艺上的改变使本发明生产的旋磁铁氧体材料4πMs为1650Gs、居里温度Tc为270℃、线宽△H为15Oe、介电常数εr为14.9-15.1,均能很好的满足环形器和隔离器的要求。而且,该高饱和磁化强度,高居里温度,低损耗,性能一致性好等特性,适合批量生产。
具体实施方式
一、配料
将Fe2O3:Y2O3:Gd2O3:ZrO2:MnO=58:36:2:2:2,按照以上mol比换算到重量比,进行称重配料。(根据使用使用和性能微调差异上的要求,该Fe2O3:Y2O3:Gd2O3:ZrO2:MnO之间的比例关系还可以为50-65:30-40:1-5:1-5:1-5中的任何一种,例如50:40:35:1:1:1;65:30:5:5:5;55:32:1:1:2等,在本实施例中已最优方案58:36:2:2:2进行下述具体说明)
二、一次砂磨
以钢球:原材料:去离子水=3.3:1:1的比例进行配比,放入砂磨罐中,以100转/min的转速,进行砂磨60min。(根据不同配方的需要,该步骤中钢球:原材料:去离子水还可以为3.3:1:0.4,3.3:1:0.6,3.3:1:0.8,等,砂磨的时间可以为45min,70min,100min等)
三、喷雾造粒
将第一次砂磨好的浆料打入搅拌池中,加入干胶含量1.2%的胶水,胶水:料浆=1:10,料浆固含量为50%,进行喷雾造粒。(根据不同配方的需要,该步骤中胶水:料浆还可以为1:8,1:12,1:9等,料浆固含量为55%,60%,65%等)
在本实施例中干胶为聚乙烯醇;
胶水为:聚乙烯醇加水,通过加热熬制而成不同含胶量的溶液。
四、预烧
将喷雾造粒料,倒入预烧盒中,放入钟罩炉中,进行预烧,预烧温度1200°,保温时间180min。(根据不同配方的需要,预烧温度可在1000-1300℃之间调整,时间可以为120-200min之间调整)
五、二次砂磨
以钢球:原材料:去离子水=3.3:1:0.55的比例进行配比,放入砂磨罐中,以150转/min的转速,进行砂磨180min,浆料粒度D50:0.8。(根据不同配方的需要,该步骤中钢球:原材料:去离子水还可以为3.3:1:0.65,3.3:1:0.75,3.3:1:1.1等,砂磨的时间可以为120min,140min,200min等)
六、喷雾造粒
将第二次砂磨好的浆料打入搅拌池中,加入干胶含量1.2%的胶水,胶水:料浆=1:10,料浆固含量为65%,进行喷雾造粒,过筛,取60-200目之间的粉料。(根据不同配方的需要,该步骤中胶水:料浆还可以为1:8,1:12,1:9等,料浆固含量为60%,70%,85%等)
七、压型
将喷雾造粒料,按照所需产品要求:压型工艺单,在相应压机和配套模具下,进行压型,保证产品生坯密度在3.5g/cm3
八、烧结
将压制好的坯件,放置在承烧板上,放入钟罩炉中,按照如下烧结工艺单设定烧结工艺,进行烧结,烧结温度144-1460°,保温时间360-480min。
Figure BDA0002647361340000061
Figure BDA0002647361340000071
九、精加工
将烧结好的烧结品,按照精加工工艺单,加工到所需要的尺寸标准。
十、检验
将生产的材料,对其4πMs、居里温度Tc、线宽△H、
介电常数εr,介电损耗角正切tanδ,剩磁Br,矫顽力Hc进行测试,检测结果如表1。
表1
Figure BDA0002647361340000072
将加工好的产品,进行环形器性能检测,检测结果如表2。
表2
Figure BDA0002647361340000073
综上所述,本发明生产的旋磁铁氧体材料,具有高饱和磁化强度,高居里温度,低损耗,性能一致性好,适合批量生产。本发明生产的旋磁铁氧体材料4πMs为1650Gs、居里温度Tc为270℃、线宽△H为15Oe、介电常数εr为14.9-15.1,均能很好的满足环形器和隔离器的要求。

Claims (10)

1.一种微波旋磁铁氧体材料,其特征在于,由如下摩尔比的组分制造而成:
Figure FDA0002647361330000011
2.如权利要求1所述的一种微波旋磁铁氧体材料,其特征在于:
所述VIII系金属的氧化物选自铁的氧化物;
和/或
所述IIIB系金属的氧化物选自钇的氧化物;
和/或
所述镧系金属的氧化物选自钆的氧化物;
和/或
所述IVB系金属的氧化物选自锆的氧化物;
和/或
所述VIIB系金属的氧化物选自锰的氧化物。
3.如权利要求1所述的一种6GHz环形器的微波旋磁铁氧体材料,其特征在于,
由如下摩尔比的组分制造而成:
Figure FDA0002647361330000012
4.如权利要求1-4任一所述的一种微波旋磁铁氧体材料的制造方法,其特征在于:包括至少两次的砂磨造粒工序。
5.如权利要求4所述的一种微波旋磁铁氧体材料的制造方法,其特征在于,具体工艺步骤如下所示:
S1.配料;
S2.第一次砂磨;
S3.第一次喷雾造粒;
S4.预烧;
S5.第二次砂磨;
S6.第二次喷雾造粒;
S7.压型;
S8.烧结。
6.如权利要求5所述的一种微波旋磁铁氧体材料的制造方法,其特征在于:
所述砂磨过程中,钢球:原材料:去离子水的比例为3.3:1:0.4-1.2,以80-200转/min的转速,进行砂磨40-250min;
其中,所述第一次砂磨的过程中,所使用的去离子水的量大于第二次砂磨的过程;
所述第二次砂磨的过程中,所采用的砂磨转速大于第一次砂磨的过程;
所述第二次砂磨的过程中,砂磨时间大于第一次砂磨的过程。
7.如权利要求6所述的一种微波旋磁铁氧体材料的制造方法,其特征在于:
所述喷雾造粒过程中,向砂磨后的浆料中加入胶水,所述胶水与浆料的质量比为1:5-20;
所述浆料的固含量不小于50%;
所述第二次喷雾造粒的过程中,浆料的固含量大于第一次喷雾造粒的过程;
所述第二次喷雾造粒的过程中还包括过筛工艺。
8.如权利要求5所述的一种微波旋磁铁氧体材料的制造方法,其特征在于:
所述预烧的工艺条件为:烧结温度1000-1300℃,保温时间60-200min;
所述压型后产品的生坯密度不低于3.5g/cm3
所述烧结的工艺为曲线烧结。
9.如权利要求5所述的一种微波旋磁铁氧体材料的制造方法,其特征在于:
所述烧结的具体工艺条件为:
Figure FDA0002647361330000031
10.如权利要求1-9任一所述的一种微波旋磁铁氧体材料,其特征在于,具有如下至少一种的用途;
用途A.用于制造通信产品的组件/配件;
用途B.用于制造环形器;
用途C.用于制造隔离器;
用途D.用于制造6GHz环形器。
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