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锰锌铁氧体空心纤维的制备及其磁性能

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Abstract:

以柠檬酸及金属盐为原料,采用有机凝胶-热分解法制备出Mn_(1-x)Zn_xFe_2O_4(X=0.2~0.8)铁氧体空心纤维。通过Fourier红外光谱、热重-差示扫描量热仪、X射线衍射和扫描电镜分别对凝胶前驱体的结构、热分解过程及热处理产物的物相和形貌进行了表征,用振动样品磁强计对纤维的磁性能进行了检测。结果表明所得Mn_(1-x)Zn_xFe_2O_4铁氧体空心纤维的晶粒尺寸约为lOnm,纤维表面光滑、致密,直径在0.5~5.0μm之间,且具有较大的长径比。纤维的饱和磁化强度和矫顽力以及平均晶粒尺寸都随焙烧温度的升高和保温时间的延长而增大,400℃热处理制得的Mn-Zn铁氧体纤维由于其晶粒粒径小于临界尺寸而表现出超顺磁特征。随Zn含量的提高,纤维的饱和磁化强度先增加后减小,在x=0.63附近达到最大值,而矫顽力在x=0.43左右达到最小值。具有形状各向异性的Mn-Zn铁氧体空心纤维的矫顽力明显高于经相同工艺制得的同组分粉体的矫顽力。

References

[1]  古映莹,谭小平,桑商斌,等.用共沉淀法制备尖晶石型锰锌铁氧体粉体[J].中南工业大学学报(自然科学版),2002,33(4):364-366.GU Yingying,TAN Xiaoping,SANG Shangbin,et al.J Cent South Univ Technol(Nat Sci,in Chinese),2002,33(4):364-366. [2]ARULRMURUGAN R,JEYDAEVANB B,VAIDYANATHANA G,et al.Effect of zinc substitution on Co-Zn and Mn-Zn ferrite nanoparticles prepared by co-precipitation[J].J Magn Magn Mater, 2005,288:470-477. [3]杨新科,杨晓明.原生矿湿法制备锰锌铁氧体超细粉[J].硅酸盐学报,2004,32(6):781-784.YANG Xinke,YANG Xiaoming.J Chin Ceram Soc(in Chinese),2004, 32(6):781-784. [4]XUAN Y M,LI Q,YANG G.Synthesis and magnetic properties of Mn-Zn ferrite nanoparticles[J].J Magn Magn Mater,2007,312(2): 464-469. [5]AZADMANJLRI J.Preparation of Mn-Zn ferrite nanoparticles from chemical sol-gel combustion method and the magnetic properties after sintering[J].J Non-Crystal Solids,2007,353(44-46):4170-4173. [6]DASGUPTA S,DAS J,ECKERT J,et al.Influence of environ-ment and grain size on magnetic properties of nanocrystalline Mn-Zn ferrite [J].J Magn Magn Mater,2006,306(1):9-15. [7]WANG J,ZENG C,PENG Z M,et al.Synthesis and magnetic prop- erties of Zn_(1-x)Mn_xFe_2O_4 nanoparticles[J].Physica B,2004,349: 124-128. [8]PULLAR R C,BHATTACHARYA A K.The magnetic properties of aligned M hexa-ferrite fibres[J].J Magn Magn Mater,2006,300: 490-499. [9]PULLAR R C,TAYLOR S M D,BHATTACHARYA A K.A halide free route to the manufacture of microstructurally improved M ferrite (BaFe_(12)O_(19)and SrFe_(12)O_(19))fibres[J].J Eur Ceram Soc,2002,22(12): 2039-2045. [10]ZHANG C Y,SHEN X Q,ZHOU J X,et al.Preparation of spinel ferdte NiFe_2O_4 fibers by organic Gel-thermal composition process[J]. J Sol-Gol Sci Technol,2007,42:95-100. [11]向军,沈湘黔,朱永伟.尖晶石型铁氧体纤维的制备及磁性能[J].无机材料学报,2007,23(5):1005—1010.XIANG Jun,SHEN Xiangqian,ZHU Yongwei.J Inorg Mater(in Chi- nese),2007,23(5):1005-1010. [12]STRATHMANN T J,MYNENI S C B.Speciation of Ni(Ⅱ)-carboxy- late and Ni(Ⅱ)-fulvic acid solutions:Combined ATR-FTIR and XAFS analysis[J].Geochim Cosmochim Acta,2004,68(17):3441-3458. [13]TSAI M T.Effect of hydrolysis processing on the character of forsterite gel fibres PartⅡ:crystallites and microstructural evolutions[J].J Eur Ceram Soc,2002,22(7):1085-1094. [14]CONG C R,CHEN D R,JIAO X L.Sol-gel synthesis of hollow zinc ferrite fibers[J].J Sol-Gol Sci Technol,2005,35:77-82. [15]LIU C,ZHANG Z J.Size-dependent superparamagnetic properties of Mn spinel ferrite nanoparticles synthesized from reverse micelles[J]. Chem Mater,2001,13(6):2092-2096. [16]SATTAR A A,EL-SAYED H M,EL-SHOKROFY K M,et al.Im- provement of the magnetic properties of Mn-Ni-Zn ferrite by the non- magnetic Al~(3+)-ion substitution[J].J Appl Sci,2005,5:162-168.

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