03 (La-Ce-Pr-Nd)_1Fe_(13-x)Si_x合金的物相结构和磁热性能研究

王高峰;顾庆典;刘鑫;任伟;

• 1:内蒙古科技大学理学院

• 2:内蒙古科技大学白云鄂博矿多金属资源综合利用重点实验室

• 
  

摘要(Abstract)：

NaZn_(13)型LaFe_(13-x)Si_x合金是一种具有应用前景的室温制冷材料.文中使用工业纯的La-Ce-Pr-Nd混合稀土替代La元素，制备了名义成分为(La-Ce-Pr-Nd)_1Fe_(13-x)Si_x系列合金，研究了该系列合金的物相组成和磁热性能.XRD精修结果表明，合金中除了立方结构的主相外，还有其他3种不同结构的杂相，与扫描电镜背散射图谱分析结果吻合.合金的热磁曲线表明，随着温度的升高，所有合金均发生从铁磁态向顺磁态转变的二级相变.当合金中的摩尔比例在0～2 T外磁场的作用下，合金的最大等温磁熵变从4.5 J/kgK下降至2.6 J/kgK.研究结果对探索混合稀土在磁热材料中的应用提供有益参考.

关键词(KeyWords)： 物相组成;磁热效应;合金;混合稀土

基金项目(Foundation): 国家自然科学基金资助项目(11564030);; 内蒙古自治区自然科学基金资助项目(2021LHMS01005)

作者(Authors): 王高峰;顾庆典;刘鑫;任伟;

DOI: 10.16559/j.cnki.2095-2295.2023.01.003

参考文献(References)：

• [1] ZHANG Y,WU J,HE J,et al.Solutions to obstacles in the commercialization of room-temperature magnetic refrigeration[J].Renewable and Sustainable Energy Reviews,2021,143:110933.

• [2] GRECO A,APREA C,MAIORINO A,et al.A review of the state of the art of solid-state caloric cooling processes at room-temperature before 2019[J].International Journal of Refrigeration,2019,106:66.

• [3] 李振兴，李珂，沈俊，等.室温磁制冷技术的研究进展[J].物理学报，2017,66(11):13.

• [4] FRANCO V,BLáZQUEZ J S,IPUS J J,et al.Magnetocaloric effect:From materials research to refrigeration devices[J].Progress in Materials Science,2018,93:112.

• [5] GOTTSCHALL T,SKOKOV K,FRIES M,et al.Magnetic refrigeration:making a cool choice[J].Advanced Energy Materials,2019,9:1970130.

• [6] 郑新奇，沈俊，胡凤霞，等.磁热效应材料的研究进展[J].物理学报，2016,65(21):7.

• [7] SHEN B,SUN J,HU F,et al.Recent progress in exploring magnetocaloric materials[J].Advanced Materials,2009,21(45):4545.

• [8] HU F,SHEN B,SUN J,et al.Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11.4Si1.6[J].Applied Physics Letters,2001,78(23):3675.

• [9] FUJIEDA S,FUJITA A,Fukamichi K.Large magnetocaloric effect in La(FexSi1-x)13 itinerant-electron metamagnetic compounds[J].Applied Physics Letters,2002,81(7):1276.

• [10] ANH D T K,THUY N P,DUC N H,et al.Magnetism and magnetocaloric effect in La1-yNdy(Fe0.88Si0.12)13 compounds[J].Journal of Magnetism and Magnetic Materials,2003,262(3):427.

• [11] FUJIEDA S,FUJITA A,FUKAMICHI K,et al.Large magnetocaloric effects enhanced by partial substitution of Ce for La in La(Fe0.88Si0.12)13 compound[J].Journal of Alloys and Compounds,2006,408.

• [12] FUJIEDA S,FUJITA A,FUKAMICHI K.Enhancement of magnetocaloric effects in La1-zPrz(Fe0.88Si0.12)13 and their hydrides[J].Journal of Applied Physics,2007,102(2):23907.

• [13] BAO L,HU F,CHEN L,et al.Magnetocaloric properties of La(Fe,Si)13-based material and its hydride prepared by industrial mischmetal[J].Applied Physics Letters,2012,101(16):162406.

• [14] LIU J,KRAUTZ M,SKOKOV K,et al.Systematic study of the microstructure,entropy change and adiabatic temperature change in optimized La-Fe-Si alloys[J].Acta Materialia,2011,59(9):3602.

• [15] DING M,LIU Z,CHEN R,et al.Magnetocaloric effect in NaZn13-type La1-xPrxFe11.44Si1.56 melt-spun ribbons[J].Journal of Applied Physics,2010,107(9):09A952.

• [16] WANG G,ZHAO Z,ZHANG X,et al.Enhancement of magnetocaloric effect in mischmetal doped La-Fe-Si alloys[J].AIP Advances,2017,8(5):56413.

• [17] BAO B,HUANG P,FU B,et al.Enhancement of magnetocaloric effects in La0.8R0.2(Fe0.919Co0.081)11.7Al1.3 (R=Pr,Nd) compounds[J].Journal of Magnetism and Magnetic Materials,2009,321(7):786.

• [18] ZHOU X,JIANG W,KUNKEL H,et al.Entropy changes accompanying the magnetic phase transitions in low Si-doped Ce2Fe17-xSix alloy[J].Journal of Magnetism and Magnetic Materials,2008,320(6):930.

• [19] ARAJS S,COLVIN R.Ferromagnetic-paramagnetic transition in iron[J].Journal of Applied Physics,1964,35(8):2424.

• [20] FELNER I,MAYER I,GRILL A,et al.Magnetic ordering in rare earth iron silicides and germanides of the RFe2X2 type[J].Solid State Communications,1975,16(8):1005.

• [21] TANG Z,DENG X,Hadjipanayis G,et al.Structural and magnetic properties of LaFe13-xSix nitrides[J].IEEE Transactions on Magnetics,1993,29(6):2839.

• [22] WEN G,ZHENG R,ZHANG X,et al.Magnetic entropy change in LaFe13-xSix intermetallic compounds[J].Journal of Applied Physics,2002,91(10Part1):8537.

• [23] SHEN J,LI Y,SONG J,et al.Effect of R substitution on magnetic properties and magnetocaloric effects of La1-xRxFe11.5Si1.5 compounds with R=Ce,Pr and Nd[J].Chinese Physics B,2009,18(5):2058.

• [24] SHEN J,LI Y,DONG Q,et al.Magnetocaloric properties of the La0.7Pr0.3Fe13-xSix compounds[J].Journal of Magnetism and Magnetic Materials,2009,321(15):2336.