| 引用本文: | 张家敏,易健宏,甘国友.微波烧结Mn-Zn 铁氧体的微观结构演变特征[J].材料科学与工艺,2014,22(2):17-23.DOI:10.11951/j.issn.1005-0299.20140204. |
| ZHANG Jiamin,YI Jianhong,GAN Guoyou.Microstructure characteristics of microwave sintered Mn-Zn ferrite soft magnetic materials[J].Materials Science and Technology,2014,22(2):17-23.DOI:10.11951/j.issn.1005-0299.20140204. |
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| 摘要: |
| 以传统氧化物法合成的Mn-Zn 铁氧体前驱体和外购前驱体为实验原料,经压制成形后用频率为2.45 GHz的微波在1 200～1 400 ℃烧结制备Mn-Zn 铁氧体软磁材料.对烧结过程样品的微观结构和形貌进行了研究,并探究了烧结过程致密化特性及微波加热温度对Mn-Zn 铁氧体密度的影响.研究表明:微波烧结的Mn-Zn 铁氧体具有典型的尖晶石结构,样品主体相为Mn0.4Zn0.6Fe2O4；用SEM观察样品形貌,发现在1 350～1 400 ℃烧结的样品结晶状况良好,晶界平直,烧结组织均匀；微波烧结温度对密度有较大影响,在1 200～1 400 ℃,随着烧结温度升高样品密度增高,密度为4.80～5.28 g/cm3,在1 400 ℃烧结样品比较致密.微波烧结可以实现样品的快速致密. |
| 关键词: 微波烧结 Mn-Zn 铁氧体 微观结构 温度 密度 |
| DOI：10.11951/j.issn.1005-0299.20140204 |
| 分类号:TM27 |
| 基金项目:国家自然科学基金资助项目(51274107)；云南省高端人才项目(2010C1106)；昆明理工大学分析测试基金资助项目(2011007)；昆明理工大学金川预研基金资助项目(6488-20120023). |
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| Microstructure characteristics of microwave sintered Mn-Zn ferrite soft magnetic materials |
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ZHANG Jiamin ,YI Jianhong, GAN Guoyou
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(College of Material Science and Engineering ,The Kunming University of Science and Technology, Kunming 650093, China)
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| Abstract: |
| The Mn-Zn ferrite were prepared by microwave with frequency of 2.45 GHz sintering at 1 200～1 400 ℃. Two precursor powders, one was synthesized by conventional mixed oxide method and another was provided by market, were compacted and sintered. Microstructure evolution of the sintered ferrite samples was carried out using X-ray diffraction (XRD), scanning electron microscope (SEM). The sample densification properties during sintering and the effect of microwave heating temperature on the sample density were studied, and the results showed that the sample with density range of 4.80~5.28 g/cm3, has a typical spinel structure, and the main phase is Mn0.4Zn0.6Fe2O4. The microwave sintering temperature has greater impact on the density, and with the sintering temperature increasing, the density increases. A good crystallizing and homogeneous with straight grain boundaries in samples, can be observed by SEM at 1 350~1 400 ℃. Microwave sintering can achieve rapid densification of samples. |
| Key words: microwave sintering Mn-Zn ferrite microstructure evolution temperature densication. |
