余兆偉 吳澤 單連偉 董麗敏 韓志東 張顯友
摘要:采用高溫固相法制備了Sr1-xSmxFe12-xMnxO19(x=0~0.4)。利用XRD、SEM、VSM等表征手段對鍶鐵氧體的晶相、形貌和磁性能進行了表征。通過XRD分析發(fā)現(xiàn)當摻雜量0≤x<0.2時衍射峰基本沒有出現(xiàn)雜峰,衍射峰的強度比較高,粉體為結晶度比較高的單一六方相鍶鐵氧體。通過SEM發(fā)現(xiàn)隨著摻雜量的增加晶體的晶粒尺寸逐漸增大;通過VSM分析發(fā)現(xiàn):隨著摻雜量的增大矯頑力Hc出現(xiàn)先增大后減小的趨勢。測試結果表明:當摻雜量在x=0.2時SmMn聯(lián)合取代鍶鐵氧體的結晶度最好,矯頑力最大Hc=33.417emu/g。
關鍵詞:SmMn聯(lián)合取代;固相法;磁性能
DOI:10.15938/j.jhust.2018.01.009
中圖分類號: O737
文獻標志碼: A
文章編號: 1007-2683(2018)01-0046-05
Abstract:The Sr1-xSmxFe12-xMnxO19(x=0~0.4) materials were prepared by highheating solidstate reaction. The products were characterized by Xray diffraction (XRD), scanning electric microscope(SEM) and vibrating sample magnetometer(VSM). The XRD results analysis showed that Sm3+ and Mn2+ have been completely doped into strontium ferrite phase for Sr1-xSmxFe12-xMnxO19(0≤x<0.2). With the increase of SmMn content,the grain size gradually increases. VSM results indicate that the Hc increases (x being in the range of 0-0.2), and then decrease with the dosages of SmMn from 0 to 0.4. The results showed that when x being equal to 0.2, the crystallization was best and the maximum Hc (33.417emu/g) was obtained.
Keywords:SmMn codoping; solidstate reaction; magnetic properties
參 考 文 獻:
[1]JACOBO S E, CIVALE L, BLESA M A. Evolution of the Magnetic Properties During the Thermal Treatment of Barium Hexaferrite Precursors Obtained by Coprecipitation from Barium Ferrate (VI) Solutions[J]. J. Magn. Magn.Matter, 2003(260): 37-41.
[2]YANG N, JIA H, PANG J. Formation and Magnetic Properties of Nanosized PbFe12O19particles Synthesized by Citrate Precursor Technique[J]. J. Alloys Compd, 2007, 438(1/2):263-267.
[3]QIU J X, GU M Y, SHEN H G. Microwave Absorption Properties of Al and Crsubstituted Mtype Barium Hexaferrite[J]. J. Magn. Magn. Matter, 2005(295):263-268.
[4]HOCHEPIED J F, PLIENI M P. Magnetic Properties of Mixed Cobaltzinc Ferrite Nanoparticles[J].J. Appl. Phys, 2000,87(5):2472.
[5]LI X, YANG W G, BAO D X, et al. Influence of Ca Substitution on the Microstructure and Magnetic Properties of SrLaCo Ferrite[J]. J.Magn.Magn.Mater, 2013, 329(1): 1-5.
[6]HSIANG H I, YAO R Q.Hexagonal Ferrite Powder Synthesis Using Chemical Coprecipitation[J]. Materials Chemistry and Physics, 2007, 104(1):1-4.
[7]SHEPHERD P, MALLICK K K, GREEN R J.Magnetic and Structural Properties of Mtype Barium Hexaferrite Prepared by Coprecipitation [J]. Journal of Magnetism and Magnetic Materials, 2007, 311(2): 683-692.
[8]GHASEMI A, ALAM R S, MORISAKO A. Preparation and Magnetic Properties of Hexagonal Barium Ferrite Films Using BaM Nanoparticles[J]. Physica B:Condensed Matter, 2008, 403(18):2987-2990.
[9]LI H, HUANG J, LI Q F, et al.Preparation of Barium Ferrite Films with High Fe/Baratio by Solgel Method[J]. Journal of SolGel Science and Technology, 2009, 52(3): 309-314.
[10]CHEN Na, YANG Kai, GU Ming Yuan. Microwave Absorption Properties of Lasubstituted Mtype Strontium Ferrites[J]. Journal of Alloys and Compounds, 2010, 490(1/2): 609-612.
[11]連江濱, 呂寶順, 廖有良, 等. LaZn替代對永磁鐵氧體磁粉結構與性能的影響[J].磁性材料及器件, 2011,142(3): 53-55,67.
[12]SEIFERT D, TOPFER J, LANGENHORST F, et al. Synthesis and Magnetic Properties of Lasubstituted Mtype Sr Hexaferrites[J]. J. Magn. Magn. Mater, 2009, 321(24): 4045-4051.
[13]LIU X. S, WEI Z, et al.Influence of La3+ Substitution on the Structure and Magnetic Properties of Mtype Strontium Ferrites[J]. J. Magn.Magn.Mater, 2002,238(6): 207-214.
[14]AMIGHIAN J, MOZAFFARI M, ARAB A, et al. The Effect of Lasubstitutionon the Magnetic Properties of Nanosized Sr1-xLaxZn0.2(Fe3+)11.75-δ(Fe2+)δO19 Powders[J]. J. Magn.Magn.Mater, 2010, 322(6): 748-752.
[15]YOU L S, QIAO L, ZHENG J W, et al. Magnetic Properties of LaZn Substituted Srhexaferrites by Selfpropagation Hightemperature Synthesis[J].Journal of Rare Earths, 2008, 26(1): 81-84.
(編輯:溫澤宇)