Co_(50)Fe_(50)/Al_2O_3纳米复合材料结构的穆斯堡尔谱学研究
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摘要
采用溶胶-凝胶(sol-gel)工艺合成了复合材料前驱凝胶,并在900℃高温下进行H2还原,制备了Co_(50)Fe_(50)/Al_2O_3纳米复合材料.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对其纳米复合材料的微观结构与形貌进行了测试与观察,利用穆斯堡尔谱(M■ssbauer)对其纳米复合材料的微观磁学结构进行了研究.结果表明,复合材料中Al_2O_3的含量对CoFe磁性纳米合金的晶粒结构和磁学结构有重要的影响,同时也提高了CoFe磁性纳米合金的抗氧化性.
In this paper,Co_(50)Fe_(50)/Al_2O_3 nanocomposites were prepared by H_2 reduction of the precursor synthesized by sol-gel method. For the Co_(50)Fe_(50)/Al_2O_3 nanocomposites,the microstructures were measured by X-ray diffractometer(XRD) and the morphologies were observed by scanning electron microscope(SEM) and transmission electron microscope(TEM). The microscopic magnetic structure was studied by M■ssbauer. The results show that the content of Al_2O_3 in the composites had an important effect on the grain structure and magnetic structure of CoFe alloy. And the oxidation resistance of CoFe magnetic nano-alloy was improved due to the existence of Al_2O_3.
In this paper,Co_(50)Fe_(50)/Al_2O_3 nanocomposites were prepared by H_2 reduction of the precursor synthesized by sol-gel method. For the Co_(50)Fe_(50)/Al_2O_3 nanocomposites,the microstructures were measured by X-ray diffractometer(XRD) and the morphologies were observed by scanning electron microscope(SEM) and transmission electron microscope(TEM). The microscopic magnetic structure was studied by M■ssbauer. The results show that the content of Al_2O_3 in the composites had an important effect on the grain structure and magnetic structure of CoFe alloy. And the oxidation resistance of CoFe magnetic nano-alloy was improved due to the existence of Al_2O_3.
引文
[1]LI X H,FENG J,Du Y P,et al. One-pot synthesis of CoFe2O4/graphene oxide hybrids and their conversion into Fe Co/graphene hybrids for lightweight and highly efficient microwave absorber[J]. J Mater Chem,2015,3:5535-5546.
[2]ZKALE B,SHAMSUDHIN N,BUGMANN T. Magnetostriction in electroplated CoFe alloys[J]. Electrochem Commun,2017,76:15-19.
[3]ZHANG Y H,IVEY D G. Electrodeposition of nanocrystalline CoFe soft magnetic thin films from citrate-stabilized baths[J]. Mater Chem Phys,2018,204:171-178.
[4]MA X J,CHAI H,CAO Y L,et al. An effective bifunctional electrocatalysts:Controlled growth of CoFe alloy nanoparticles supported on N-doped carbon nanotubes[J]. J Colloid Interf Sci,2018,514:656-663.
[5]ZHANG H L,TANG X W,WEI R H. Microstructure refinement and magnetization improvement in CoFe thin films by high magnetic field annealing[J]. J Alloy Compd,2017,729:730-734.
[6]GEORGE J,ELHALAWATY S,MARDINLY J A,et al. Oxide/hydroxide incorporation into electrodeposited CoFe alloys-Consequences for magnetic softness[J]. Electrochim Acta,2013,110:414-417.
[7]WANG C,XU T T,WANG C A. Microwave absorption properties of C/(C@CoFe)hierarchical core-shell spheres synthesized by using colloidal carbon spheres as templates. Ceram Int,2016,42:9178-9182.
[8]SELLARAJAN B,SARAVANAN P,GHOSH S K,et al. Shape induced magnetic vortex state in hexagonal ordered cofe nanodot arrays using ultrathin alumina shadow mask[J]. J Magn Magn Mater,2018,451:51-56.
[9]RAMULU T S,VENU R,SINHA B,et al. Synthesis and cysteamine functionalization of CoFe/Au/CoFe nanowires[J]. Mater Sci Eng A,2012,550:146-151.
[10]WEN J,CHU W,JIANG C F,et al. Growth of carbon nanotubes on the novel Fe Co-Al2O3 catalyst prepared by ultrasonic coprecipitation[J].J Nat Gas Chem,2010,19:156-160.
[11]YANG F J,CHEN H B,LIU D G,et al. The microstructure and magnetic properties of Fe Co@SiO2core-shell nanoparticles synthesized by using a solution method[J]. J Alloy Compd,2017,728:1153-1156.
[12]TANG G D,HOU D L,ZHANG M,et al. Influence of preparing condition on magnetic properties of the Fe CoNi-SiO2granular alloy solids[J].J Magn Magn Mater,2002,215:42-49.
[2]ZKALE B,SHAMSUDHIN N,BUGMANN T. Magnetostriction in electroplated CoFe alloys[J]. Electrochem Commun,2017,76:15-19.
[3]ZHANG Y H,IVEY D G. Electrodeposition of nanocrystalline CoFe soft magnetic thin films from citrate-stabilized baths[J]. Mater Chem Phys,2018,204:171-178.
[4]MA X J,CHAI H,CAO Y L,et al. An effective bifunctional electrocatalysts:Controlled growth of CoFe alloy nanoparticles supported on N-doped carbon nanotubes[J]. J Colloid Interf Sci,2018,514:656-663.
[5]ZHANG H L,TANG X W,WEI R H. Microstructure refinement and magnetization improvement in CoFe thin films by high magnetic field annealing[J]. J Alloy Compd,2017,729:730-734.
[6]GEORGE J,ELHALAWATY S,MARDINLY J A,et al. Oxide/hydroxide incorporation into electrodeposited CoFe alloys-Consequences for magnetic softness[J]. Electrochim Acta,2013,110:414-417.
[7]WANG C,XU T T,WANG C A. Microwave absorption properties of C/(C@CoFe)hierarchical core-shell spheres synthesized by using colloidal carbon spheres as templates. Ceram Int,2016,42:9178-9182.
[8]SELLARAJAN B,SARAVANAN P,GHOSH S K,et al. Shape induced magnetic vortex state in hexagonal ordered cofe nanodot arrays using ultrathin alumina shadow mask[J]. J Magn Magn Mater,2018,451:51-56.
[9]RAMULU T S,VENU R,SINHA B,et al. Synthesis and cysteamine functionalization of CoFe/Au/CoFe nanowires[J]. Mater Sci Eng A,2012,550:146-151.
[10]WEN J,CHU W,JIANG C F,et al. Growth of carbon nanotubes on the novel Fe Co-Al2O3 catalyst prepared by ultrasonic coprecipitation[J].J Nat Gas Chem,2010,19:156-160.
[11]YANG F J,CHEN H B,LIU D G,et al. The microstructure and magnetic properties of Fe Co@SiO2core-shell nanoparticles synthesized by using a solution method[J]. J Alloy Compd,2017,728:1153-1156.
[12]TANG G D,HOU D L,ZHANG M,et al. Influence of preparing condition on magnetic properties of the Fe CoNi-SiO2granular alloy solids[J].J Magn Magn Mater,2002,215:42-49.