CN112851324A - 一种应用于高频领域的复合材料 - Google Patents

一种应用于高频领域的复合材料 Download PDF

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CN112851324A
CN112851324A CN202110082969.8A CN202110082969A CN112851324A CN 112851324 A CN112851324 A CN 112851324A CN 202110082969 A CN202110082969 A CN 202110082969A CN 112851324 A CN112851324 A CN 112851324A
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composite material
ferrite
zinc
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冯双久
朱守金
刘先松
阚绪材
倪江利
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Anhui University
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Abstract

本发明提供一种应用于高频领域的复合材料，涉及高频领域铁氧体加工技术领域。所述应用于高频领域的复合材料为充磁后的软磁、硬磁复合材料，所述软磁、硬磁复合材料为锰锌铁氧体/锶铁氧体复合材料或者镍锌铁氧体/锶铁氧体复合材料。本发明克服了现有技术的不足，通过软磁铁氧体和硬磁铁氧体生产复合材料后经过充磁有效降低磁损耗，提升在高频领域的应用价值。

Description

一种应用于高频领域的复合材料
技术领域
本发明涉及高频领域铁氧体加工技术领域，具体涉及一种应用于高频领域的复合材料。
背景技术
磁性材料的发展已经有一百多年的历史，并且早已形成了完整的规模化产业。但由于磁性材料应用领域的不断扩展和对性能要求的不断提高，都要求磁性器件小型化、高频化。这就要求软磁材料要具有高的饱和磁化强度、尽可能低的磁损耗、更小的磁导率，降低软磁材料的损耗和磁导率一直是研究热点。
由于软磁材料的磁滞损耗与频率呈线性关系，涡流损耗与频率的平方成正比，磁性器件的高频化导致材料损耗的明显上升，同时器件的小型化使散热变得更加困难，所以应用于高频领域的软磁材料必须具有较小的磁导率以保证材料具有足够高的截止频率，对降低磁滞损耗是不利的。对于软、硬磁复合材料而言，可以通过调节软磁、硬磁的化学成分或者软磁、硬磁复合比例来调节磁性材料的磁导率，以便应用于高频领域。
发明内容
针对现有技术不足，本发明提供一种应用于高频领域的复合材料，通过软磁铁氧体和硬磁铁氧体生产复合材料后进行充磁有效降低磁损耗，提升在高频领域的应用价值。
为实现以上目的，本发明的技术方案通过以下技术方案予以实现：
一种应用于高频领域的复合材料，所述应用于高频领域的复合材料为充磁后的软磁、硬磁复合材料。
优选的，所述软磁、硬磁复合材料为锰锌铁氧体/锶铁氧体复合材料或者镍锌铁氧体/锶铁氧体复合材料。
优选的，所述镍锌铁氧体/锶铁氧体复合材料和锰锌铁氧体/锶铁氧体复合材料中的锶铁氧体可以替换为钡铁氧体或者其它成分的硬磁铁氧体。
所述锰锌铁氧体/锶铁氧体复合材料的制备工艺包括以下步骤：
(1)锰锌铁氧体预烧料的制备：将二氧化锰、氧化锌、三氧化二铁按一定摩尔比混合后球磨混料，放入马弗炉中在850-1000℃空气中煅烧2h，得预烧料备用；
(2)上述预烧料球磨成平均粒径1μm的粉末后和平均粒径1μm的锶铁氧体粉末混合，压制成圆环生坯，放入马弗炉中，在1150-1400℃氮气气氛中煅烧2h，随炉冷却后得到复合材料磁环。
优选的，所述步骤(1)中二氧化锰、氧化锌、三氧化二铁混合的摩尔比为(1-x-y)∶(x)∶(1+y/2)，其中x＝0.05-0.4,y＝0-0.1。
所述镍锌铁氧体/锶铁氧体复合材料的制备方法包括以下步骤：
(1)镍锌铁氧体预烧料的制备：将氧化镍、氧化锌、三氧化二铁按一定摩尔比混合后球磨混料，放入马弗炉中在850-1000℃空气中煅烧2h，得预烧料备用；
(2)上述预烧料球磨成平均粒径1μm的粉末后和平均粒径为1μm的锶铁氧体粉末混合，压制成圆环生坯，放入马弗炉中，在1150-1400℃空气中煅烧2h，随炉冷却后得到复合材料磁环。
优选的，所述步骤(1)中氧化镍、氧化锌、三氧化二铁混合的摩尔比为(1-x)∶x∶1,其中x＝0.1-0.6。
本发明提供一种应用于高频领域的复合材料，与现有技术相比优点在于：
通过将软磁铁氧体和硬磁铁氧体相结合形成复合材料后充磁处理，保证所得复合材料具有较小的磁导率的同时降低磁滞损耗，提升复合材料在高频领域中的应用，提升材料的商业价值。
附图说明：
图1：为本发明10wt％锶铁氧体和锰锌复合铁氧体样品充磁前后磁损耗随频率变化对比图(Bm＝10mT)；
图2：为本发明10wt％锶铁氧体和镍锌复合铁氧体样品充磁前后磁损耗随频率变化对比图(Bm＝10mT)。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面结合本发明实施例对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1：
锰锌铁氧体/锶铁氧体复合材料的制备：
(1)锰锌铁氧体预烧料的制备：称量二氧化锰、氧化锌、三氧化二铁，并按0.8075mol、0.0425mol、1.075mol比例配好倒入玛瑙研钵中，充分研磨1h，将研磨料倒入三氧化二铝坩埚里，再放入马弗炉中在900℃空气中煅烧2h，得预烧料备用；
(2)上述预烧料球磨成平均粒径1μm的粉末后和平均粒径1μm的锶铁氧体粉末混合，放入马弗炉中，在1200℃氮气气氛中煅烧2h，随炉冷却后得到锰锌铁氧体/锶铁氧体复合材料磁环。
按照上述步骤分别加入2wt％、10wt％和20wt％的锶铁氧体，得到各组样品进行检测，并就同样的样品充磁检测(f＝1000kHz,Bm＝10mT)，且充磁采用永磁材料精密测量系统(NIM-2000HF)，材料的性能使用B-H分析仪(Iwatsu SY-8258)检测，其中磁损耗降低率η＝[(W1-W0)/W0]×100％，检测结果如下表1所示：
表1：不同锶铁氧体用量下锰锌铁氧体/锶铁氧体复合材料的降损耗效果
Figure BDA0002910006960000041
实施例2：
镍锌铁氧体/锶铁氧体复合材料的制备：
(1)镍锌铁氧体预烧料的制备：称量氧化镍、氧化锌、三氧化二铁并按0.6mol、0.4mol、1mol比例配好倒入玛瑙研钵中，充分研磨1h，将研磨的原料倒入三氧化二铝坩埚里，放入马弗炉中在900℃空气中煅烧2h，得预烧料备用；
(2)上述预烧料球磨成平均粒径1μm的粉末后和平均粒径为1μm的锶铁氧体粉末混合，压制成圆环生坯，放入马弗炉中在1200℃空气中煅烧2h，随炉冷却后得到镍锌铁氧体/锶铁氧体复合材料磁环；
按照上述步骤分别加入5wt％、10wt％、15wt％和20wt％的锶铁氧体，得到各组样品进行检测，并就同样的样品充磁检测
(f＝1000kHz,Bm＝10mT)，且充磁采用永磁材料精密测量系统(NIM-2000HF)，材料的性能使用B-H分析仪(Iwatsu SY-8258)检测，其中磁损耗降低率η＝[(W1-W0)/W0]×100％，检测结果如下表2所示：
表2：不同锶铁氧体用量下镍锌铁氧体/锶铁氧体复合材料的降损耗效果
Figure BDA0002910006960000042
Figure BDA0002910006960000051
由上表1和表2可知，本发明所制得的镍锌铁氧体/锶铁氧体复合材料、锰锌铁氧体/锶铁氧体复合材料在充磁后均有效降低了磁损耗。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (7)

1.一种应用于高频领域的复合材料，其特征在于，所述应用于高频领域的复合材料为充磁后的软磁、硬磁复合材料。
2.根据权利要求1所述的一种应用于高频领域的复合材料，其特征在于：所述软磁、硬磁复合材料为锰锌铁氧体/锶铁氧体复合材料或者镍锌铁氧体/锶铁氧体复合材料。
3.根据权利要求2所述的一种应用于高频领域的复合材料，其特征在于：所述镍锌铁氧体/锶铁氧体复合材料和锰锌铁氧体/锶铁氧体复合材料中的锶铁氧体可以替换为钡铁氧体或者其它成分的硬磁铁氧体。
4.根据权利要求1所述的一种应用于高频领域的复合材料，其特征在于：所述锰锌铁氧体/锶铁氧体复合材料的制备工艺包括以下步骤：
(1)锰锌铁氧体预烧料的制备：将二氧化锰、氧化锌、三氧化二铁按一定摩尔比混合后球磨混料，放入马弗炉中在850-1000℃空气中煅烧2h，得预烧料备用；
(2)上述预烧料球磨成平均粒径1μm的粉末后和平均粒径1μm的锶铁氧体粉末混合，压制成圆环生坯，放入马弗炉中，在1150-1400℃氮气气氛中煅烧2h，随炉冷却后得到复合材料磁环。
5.根据权利要求4所述的一种应用于高频领域的复合材料，其特征在于：所述步骤(1)中二氧化锰、氧化锌、三氧化二铁混合的摩尔比为(1-x-y)∶(x)∶(1+y/2)，其中x＝0.05-0.4，y＝0-0.1。
6.根据权利要求1所述的一种应用于高频领域的复合材料，其特征在于：所述镍锌铁氧体/锶铁氧体复合材料的制备方法包括以下步骤：
(1)镍锌铁氧体预烧料的制备：将氧化镍、氧化锌、三氧化二铁按一定摩尔比混合后球磨混料，放入马弗炉中在850-1000℃空气中煅烧2h，得预烧料备用；
(2)上述预烧料球磨成平均粒径1μm的粉末后和平均粒径为1μm的锶铁氧体粉末混合，压制成圆环生坯，放入马弗炉中，在1150-1400℃空气中煅烧2h，随炉冷却后得到复合材料磁环。
7.根据权利要求6所述的一种应用于高频领域的复合材料，其特征在于：所述步骤(1)中氧化镍、氧化锌、三氧化二铁混合的摩尔比为(1-x)∶x∶1,其中x＝0.1-0.6。
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