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磁鉛石結(jié)構(gòu)新鈣系鐵氧體的制備與磁性能
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國(guó)家自然科學(xué)基金（51072002, 51272003）；安徽省教育廳重點(diǎn)科研項(xiàng)目（KJ2010A008, KJ2012A027）；安徽大學(xué)“211工程”學(xué)術(shù)創(chuàng)新團(tuán)隊(duì)（02303402）


Preparation and Magnetic Properties of Novel Calcium Ferrite with Magnetoplumbite Type
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    摘要:

    采用陶瓷法成功地制備了磁鉛石結(jié)構(gòu)新鈣系鐵氧體，利用X射線衍射分析儀（XRD），掃描電鏡（SEM），振動(dòng)樣品磁強(qiáng)計(jì)（VSM）和B-H分析儀，對(duì)產(chǎn)物的晶型、結(jié)構(gòu)、微觀形貌和磁性能進(jìn)行研究。結(jié)果表明，Ca2+-La3+-Co2+聯(lián)合取代可以顯著提高磁鉛石結(jié)構(gòu)鐵氧體的磁性能。與鑭鈷鍶鐵氧體相比，剩磁、磁感應(yīng)矯頑力、內(nèi)稟矯頑力和最大磁能積均有明顯的提高。這種燒結(jié)磁體變小、變薄后，仍能保持高的剩余磁通密度。

    Abstract:

    Novel calcium ferrites with magnetoplumbite structure were prepared by the ceramic technology. The structure, the morphology and the magnetic properties of the samples were investigated systematically by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating-sample magnetometer (VSM) and B-H hysteresis curve measurements. The experimental results show that the magnetic properties of calcium ferrites with Ca2+-La3+-Co2+ substitution can be significantly improved. The remanence, the magnetic induction coercivity, the intrinsic coercivity and the maximum magnetic energy of calcium ferrites have a significant improvement compared with that of strontium ferrites substituted by La3+-Co2+. In addition, the high residual flux density of the magnet can be still kept even the sintered magnet is thin and small.

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劉先松,王 超,馮雙久,阮 征.磁鉛石結(jié)構(gòu)新鈣系鐵氧體的制備與磁性能[J].稀有金屬材料與工程,2014,43(2):364~368.[Liu Xiansong, Wang Chao, Feng Shuangjiu, Ruan Zheng. Preparation and Magnetic Properties of Novel Calcium Ferrite with Magnetoplumbite Type[J]. Rare Metal Materials and Engineering,2014,43(2):364~368.]
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  • 收稿日期:2013-01-15
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  • 在線發(fā)布日期: 2014-06-03
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