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鍶鐵氧體微管的制備及鑭摻雜對其性能的影響
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Preparation of Strontium Ferrite Micropipe and Influence of La-doping on Its Property
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    摘要:

    以Fe(NO3)3·9H2O和Sr(NO3)2為原料在水溶液中形成溶膠，以脫脂棉為模板使溶膠在脫脂棉表面形成凝膠，煅燒后得到了SrFe12O19微管，并對鍶鐵氧體進(jìn)行La摻雜制得磁學(xué)性能優(yōu)良的SrLaxFe12-xO19(x=0～0.3)。采用XRD, SEM和VSM對樣品的結(jié)構(gòu)、形貌及磁性能進(jìn)行了表征。結(jié)果表明：制備的La摻雜鍶鐵氧體基本保留了棉花纖維的生物形態(tài)，其外徑在8~13 μm之間，壁厚在0.5~1 μm之間。當(dāng)煅燒溫度確定時，隨著x值的增大，樣品的矯頑力和飽和磁化強(qiáng)度先增加后減小，但飽和磁化強(qiáng)度的變化滯后于矯頑力

    Abstract:

    Fe(NO3)3·9H2O and Sr(NO3)2 were used as starting materials to form sol in the water solvent and then the sol formed gel on the surface of the absorbent cotton template. The strontium ferrite micropipe was prepared by calcining the gel. The SrLaxFe12-xO19(x=0-0.3) micropipe sample with excellent magnetic properties was obtained by doping La. The microstructure, morphology and magnetic properties of the sample were characterized by XRD, SEM and VSM. Results show that the morphology of the La-doped strontium ferrite remained the organism morphology of cotton fiber on the whole. The external diameter of the micropipe was between 8 μm and 13 μm, and the wall thickness was between 0.5 μm and 1 μm. When the calcining temperature was constant, the coercive force and the saturation magnetization of the sample increased first, and then decreased with the increase of x value. But the change of the saturation magnetization lagged the coercive force

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吳曉軍,景紅霞,張存瑞,李巧玲.鍶鐵氧體微管的制備及鑭摻雜對其性能的影響[J].稀有金屬材料與工程,2010,39(4):727~730.[Wu Xiaojun, Jing Hongxia, Zhang Cunrui, Li Qiaoling. Preparation of Strontium Ferrite Micropipe and Influence of La-doping on Its Property[J]. Rare Metal Materials and Engineering,2010,39(4):727~730.]
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  • 收稿日期:2009-04-23
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