不同钴原料制备尖晶石型钴铁氧体及吸波性能研究
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摘要
采用硝酸钴、硫酸钴、氯化钴和乙酸钴分别作为Co2+原料,通过水热法制备尖晶石型纳米钴铁氧体吸波材料。利用X射线衍射仪(XRD)、透射电镜(TEM)和矢量网络分析仪(VNA)对制备的钴铁氧体进行表征和分析。以CTAB为表面活性剂,晶化温度为180℃、晶化时间为8 h,通过对比不同原料制备的钴铁氧体形貌、粒径、电磁损耗和吸波性能可以得出结论:以硝酸钴和氯化钴为原料制备出的钴铁氧体存在杂质峰,以硫酸钴和乙酸钴为原料可以制备出纯相纳米钴铁氧体,晶面距离分别为0. 25246 nm和0. 25730 nm,平均粒径为35 nm和28. 5 nm。以乙酸钴为原料制备的钴铁氧体吸波反射率最小,为-8. 3dB,电磁波吸波效果最好。
Spinel-type nano-cobalt ferrite absorbing materials were prepared by hydrothermal method using cobalt nitrate,cobalt sulfate,cobalt chloride and cobalt acetate as Co2 +raw materials. The cobalt ferrite was characterized and analyzed by X-ray diffractometry( XRD),transmission electron microscopy( TEM) and vector network analyzer( VNA). Taking CTAB as a surfactant,the crystallization temperature is 180 ℃,and the crystallization time is 8 h. By comparing the morphology,particle size,electromagnetic loss and absorbing properties of cobalt ferrite prepared from different raw materials,it can be concluded that the cobalt ferrite prepared from cobalt nitrate and cobalt chloride has impurity peaks. Pure nano cobalt ferrite can be prepared by using cobalt sulfate and cobalt acetate as raw materials. The crystal plane distances were 0. 25246 nm and0. 25730 nm,respectively,and the average particle diameters were 35 nm and 28. 5 nm. The minimum absorbing reflectance of cobalt ferrite prepared from cobalt acetate is-8. 3 dB,and the electromagnetic wave absorbing effect is the best.
Spinel-type nano-cobalt ferrite absorbing materials were prepared by hydrothermal method using cobalt nitrate,cobalt sulfate,cobalt chloride and cobalt acetate as Co2 +raw materials. The cobalt ferrite was characterized and analyzed by X-ray diffractometry( XRD),transmission electron microscopy( TEM) and vector network analyzer( VNA). Taking CTAB as a surfactant,the crystallization temperature is 180 ℃,and the crystallization time is 8 h. By comparing the morphology,particle size,electromagnetic loss and absorbing properties of cobalt ferrite prepared from different raw materials,it can be concluded that the cobalt ferrite prepared from cobalt nitrate and cobalt chloride has impurity peaks. Pure nano cobalt ferrite can be prepared by using cobalt sulfate and cobalt acetate as raw materials. The crystal plane distances were 0. 25246 nm and0. 25730 nm,respectively,and the average particle diameters were 35 nm and 28. 5 nm. The minimum absorbing reflectance of cobalt ferrite prepared from cobalt acetate is-8. 3 dB,and the electromagnetic wave absorbing effect is the best.
引文
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[2]王剑,陈强,杨起俊.电磁辐射污染及防治[J].卫生与职业病,1999,19(4):48-49.
[3]高海涛,王建江,李泽.基于超材料设计的钡铁氧体吸波涂层研究[J].材料工程,2019,(1):70-76
[4]邬传健.高性能M型钡铁氧体及在毫米波环行器中的应用研究[D].成都:电子科技大学,2018.
[5] Chen G,Wang J Y,Ma W,et al. A Facile Solvothermal Synthesis and Magnetic Properties of MnFe2O4Spheres with Tunable Sizes[J]. J. Am.Ceram. Soc,2012,95(11):3569-3576.
[6] Gu B X. Magnetic properties and magneto-optical effect of Co0. 5Fe2. 5O4nanostructured films[J]. Applied Physics Letters,2003,82(21):3707-3709.
[7]纪世雄,曲唯贤,杨晓宏等.国外纳米材料在化工应用中的研究进展[J].化工新型材料,2010.
[8] Giri A K,Kirkpatrick E M,Moongkhamklang P,et al. Photomagnetism and structure in cobalt ferrite nanoparticles[J]. Applied Physics Letters,2002,80(13):2341-2343.
[9] Lee J H,Huh Y M,Jun Y,et al. Artificially engineered magnetic nanoparticles for ultra-sensitive molecular imaging[J]. Nature Medicine,2007,13(1):95-99.
[10] Kogan M J,Bastus N G,Amigo R,et al. Nanoparticle-Mediated Local and Remote Manipulation of Protein Aggregation[J]. Nano. Lett,2006.6(1):110-115.
[11]黄剑锋.溶胶-凝胶原理与技术[M].北京:化学工业出版社,2005,56-60.
[12] Wu K H,Chang Y C,Wang G P. Preparation of Ni-Zn ferrite/Si O2nanocomposite powders by sol-gel auto-combustion method[J]. Journal of Magnetism and Magnetic Materials,2004,269(2):150-155.
[13] Kim W C,Kim S J,Sur J C,et al. Structural and magnetic properties of CoFe1. 9RE0. 1O4(RE=Y,La)prepared by a sol-gel method[J].Journal of Magnetism and Magnetic Materials,2002,242:197-200.
[14] Caizer C,Stefaneseu M. Magnetic characterization of nanonrystalline Ni-Zn ferrite powder prepared by the glyoxylate precursor method[J].Journal of Physics D:Applied Physics,2002,35(23):3035-3040.
[15] Wang H B,Liu J H,Li W F,et al. Structural dynamic magnetic and dielectric properties of Ni0. 5Cu0. 2Zn0. 65Fe2O4ferrite produced by Na OH co-precipitation method[J]. Journal of Alloys and Compounds,2008,461(1-2):373-377.
[16] Xia A L,Jin C G,Du D X,et al. Effects of impurity Na+ions on the structural and magnetic properties of Ni-Zn-Cu ferrite powders:an improvement for chemical co-precipitation method[J]. Journal of Magnetism and Magnetic Materials,2011,323(15):2080-2082.
[17] Satyanarayana L,Reddy K M,Manorama S V. Nanosized spinel Ni Fe2O4:A novel material for the detection of liquefied petroleum gas in air[J]. Materials Chemistry and Physics,2003,82(1):21-26.
[18] Wang H W,Shong C K. Crystallization of nanosized Ni-Zn ferrite powder prepared by hydrothermal method[J]. Journal of Magnetism and Magnetic Materials,2004,270(1-2):230-236.
[19] Sattar A A,El-Sayed H M,Alsuqia L. Structural and magnetic properties of CoFe2O4/Ni Fe2O4core/shell nanocomposite prepared by the hydrothermal method[J]. Journal of Magnetism&Magnetic Materials,2015,395:89-96.
[20] Bennet J,Tholkappiyan R,Vishista K,et al. Attestation in self-propagating combustion approach of spinel AFe2O4(A=Co,Mg and Mn)complexes bearing mixed oxidation states:Magnetostructural properties[J]. Applied Surface Science,2016,383:113-125.
[21]张月萍,宋平新,宋小会,等. CoFe2O4纳米颗粒的制备及其磁学性能[J].人工晶体学报,2014,43(12):3118-3123.
[22]景红霞,高明星,王星梅,等.稀土Ce3+掺杂纳米CoFe2O4的制备及其吸波性能[J].材料研究学报,2018,32(6):449-454.
[23]刘子瑜.点击反应制备RGO/钴铁氧体复合吸波材料的研究[D].绵阳:西南科技大学,2016.
[24]陈晓芸.钴铁氧体/碳纳米管复合材料的水热合成与表征[D].上海:上海交通大学,2011.
[25] Ji G B,Tang S L,Ren S K,et al. Simplified synthesis of single-crystalline magnetic CoFe2O4nanorods by a surfactant-assisted hydrothermal process[J]. Journal of Crystal Growth,2004,270(1-2):156-161.
[26]吕庆荣,方庆清,李瑞,等.钴铁氧体纳米晶粒的结构及磁特性研究[J].安徽大学学报,2006,30(2):71-74.
[27]邵艳群,唐电.柠檬酸盐凝胶法制备纳米晶SnO2的络合过程及其相结构研究[J].金属热处理,2006,31:16-18.