CN107162580A - 高机械强度MnZn铁氧体材料 - Google Patents

高机械强度MnZn铁氧体材料 Download PDF

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CN107162580A
CN107162580A CN201710317723.8A CN201710317723A CN107162580A CN 107162580 A CN107162580 A CN 107162580A CN 201710317723 A CN201710317723 A CN 201710317723A CN 107162580 A CN107162580 A CN 107162580A
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mechanical properties
high mechanical
mnzn ferrite
ferrite materials
conversion
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颜冲
雷国莉
葛洪良
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China Jiliang University
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    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2658—Other ferrites containing manganese or zinc, e.g. Mn-Zn ferrites
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    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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Abstract

本发明提供一种高机械强度MnZn铁氧体材料，包含由以Fe2O3换算的含量为50~56mol%的氧化铁（不包括50mol%），以ZnO换算的含量为0~16mol%的氧化锌（不包括0mol%），余量以MnO换算的氧化锰作为主要成分。其特征在于：以主要成分100wt%作为计算基础，还含有以SiO2换算的氧化硅500ppm以下、以CaO换算的氧化钙1000ppm以下、以V2O5换算的五氧化二钒1000ppm以下。

Description

高机械强度MnZn铁氧体材料
技术领域
本发明涉及一种软磁铁氧体材料，尤其是指一种高机械强度MnZn铁氧体材料。
背景技术
MnZn铁氧体材料广泛用于电子、通讯领域作为能量存储和转换用材料。对MnZn铁氧体材料除了要求高磁导率、高饱和磁通密度、低损耗等电磁性能外，对MnZn铁氧体材料制备的磁心，机械强度是一个重要的性能指标。由于MnZn铁氧体是一种氧化物陶瓷材料，与其它陶瓷材料相比，同样存在机械强度特别是抗弯强度低、耐热冲击性差等问题。在铁氧体磁心的加工过程中，机械强度差会降低产品合格率。在变压器和电感器的加工过程中，磁心的机械强度差不但会降低产品的合格率，甚至会影响产品的电磁性能，导致产品不能够正常工作甚至烧机。
由于以上原因，需要开发一种机械强度高、成本低的MnZn铁氧体材料。
发明内容
本发明的目的是提供一种高机械强度 MnZn铁氧体材料。与传统MnZn铁氧体材料相比，本发明的材料不但机械强度高，而且烧结温度低，节约了制备过程中要消耗的能源，降低了生产成本。
通过提供以下内容的本发明达到了以上目的。
一种高机械强度MnZn铁氧体材料，基本组成为按Fe2O3、MnO、ZnO总量计算的含有50～56mol%的Fe2O3（不包括50mol%）、0～16mol％的ZnO（不包括0mol%）和余量为MnO组成，以主要成分100wt%作为计算基础，还含有以SiO2换算的氧化硅500ppm以下、以CaO换算的氧化钙1000ppm以下、以V2O5换算的五氧化二钒1000ppm以下。
进一步的，辅助成分氧化硅和氧化钙以SiO2和CaO计的质量比为1：1~1：10。
进一步的，辅助成分五氧化二钒以V2O5计的质量（以ppm表示）满足1000×（C/100）-0.6~-1.0。C为辅助成分CaO的质量（以ppm表示）。
进一步的，该材料在1150~1280℃温度范围进行烧结。
具体实施方式
实施例1
称取53.0mol%的Fe2O3、39.0mol%的MnO、8.0mol%的ZnO原材料作为主配方进行湿式混合，然后900℃下预烧2小时。根据主配方的重量，向预烧后的混合物中加入如表1所示的添加剂，湿式砂磨，得到一种铁氧体料浆。向料浆中加入按铁氧体粉末重量计算的1wt％的PVA粘结剂，进行喷雾造粒。在一定的压力下把造粒后的粉料成型为测试用的标准环形铁氧体磁心。把成型体在控制氧分压的条件下于1250℃烧结5小时。冷却阶段在平衡O2－N2的气氛下进行，最终得到外径为25mm、内经为15mm、高为7mm的环形烧结体用来进行电磁性能测试。得到70mm×15mm×5mm的长方体烧结体用来进行抗弯强度测试。通过X荧光分析仪，检测铁氧体磁心的最终组成与设计组成是否一致。
用IWATSU-8219交流B-H分析仪在50Hz、1194A/m条件下测试磁心在25℃下的饱和磁通密度（Bs）。用YSJ-5000数显式机械强度试验机测试磁条的抗弯强度。测试时磁条跨度为30mm，加压速率为20mm/min。抗弯强度大于50kgf为合格。
从表1看出，添加剂在本发明范围内，材料饱和磁通密度高，抗弯强度大。添加剂超出本发明范围，材料抗弯强度降低。
实施例2
磁心的制备工艺与实施例1相同。只是添加剂中含有100ppm的SiO2、含有300ppm的CaO和500ppm的V2O5。改变烧结温度如表2所示。
从表2可以看出，烧结温度在本发明范围内，材料饱和磁通密度高，抗弯强度大。烧结温度过高或过低，材料抗弯强度都有降低的趋势。
表1
表2。

Claims (4)

1.一种高机械强度MnZn铁氧体材料，基本组成为按Fe2O3、MnO、ZnO总量计算的含有50～56mol%的Fe2O3（不包括50mol%）、0～16mol％的ZnO（不包括0mol%）和余量为MnO组成，其特征在于：以主要成分100wt%作为计算基础，还含有以SiO2换算的氧化硅500ppm以下、以CaO换算的氧化钙1000ppm以下、以V2O5换算的五氧化二钒1000ppm以下。
2.如权利要求1所述的高机械强度MnZn铁氧体材料，其特征在于：辅助成分氧化硅和氧化钙以SiO2和CaO计的质量比为1：1~1：10。
3.如权利要求1所述的高机械强度MnZn铁氧体材料，其特征在于：辅助成分五氧化二钒以V2O5计的质量（以ppm表示）满足1000×（C/100）-0.6~-1.0，C为辅助成分CaO的质量（以ppm表示）。
4.如权利要求1或2或3所述的高机械强度MnZn铁氧体材料，其特征在于：该材料在1150~1280℃温度范围进行烧结。
CN201710317723.8A 2017-05-08 2017-05-08 高机械强度MnZn铁氧体材料 Pending CN107162580A (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05234737A (ja) * 1992-02-20 1993-09-10 Kawasaki Steel Corp マンガン−亜鉛系フェライト
CN1317808A (zh) * 2000-03-31 2001-10-17 Tdk株式会社 锰－锌铁氧体制造工艺,锰－锌铁氧体,和用于电源的铁氧体磁心
CN103680796A (zh) * 2013-12-10 2014-03-26 苏州冠达磁业有限公司 高温低功耗高叠加特性锰锌铁氧体及其制备方法
CN106278227A (zh) * 2016-08-13 2017-01-04 南通冠优达磁业有限公司 高强度低功耗高q值电磁炉用软磁材料及其制备方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05234737A (ja) * 1992-02-20 1993-09-10 Kawasaki Steel Corp マンガン−亜鉛系フェライト
CN1317808A (zh) * 2000-03-31 2001-10-17 Tdk株式会社 锰－锌铁氧体制造工艺,锰－锌铁氧体,和用于电源的铁氧体磁心
CN103680796A (zh) * 2013-12-10 2014-03-26 苏州冠达磁业有限公司 高温低功耗高叠加特性锰锌铁氧体及其制备方法
CN106278227A (zh) * 2016-08-13 2017-01-04 南通冠优达磁业有限公司 高强度低功耗高q值电磁炉用软磁材料及其制备方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘云飞: "MnZn铁氧体力学性能研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 *

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Application publication date: 20170915