钴铜锌铁氧体—聚吡咯微波吸收材料的制备及吸波机理分析
发布时间：2018-12-11 02:18
【摘要】：钴铜锌铁氧体Co0.8-x Cux Zn0.2Fe2O4(x=0,0.1,0.2,0.3,0.4)和钴铜锌铈铁氧体Co0.7Cu0.1Zn0.2Cex Fe2-x O4(x=0.05,0.1,0.15,0.2)采用自蔓延燃烧法被合成;聚吡咯/钴铜锌铁氧体(PPy-Co0.7Cu0.1Zn0.2Fe2O4)以及聚吡咯/钴铜锌铈铁氧体(PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4)复合物采用原位聚合法被合成。XRD、SEM、FT-IR、VSM和矢量网络分析仪被用来表征复合材料的物相、形貌及电磁性能,对钴离子与铜离子的摩尔比和铈离子掺杂量对铁氧体性能的影响,以及铁氧体掺杂量对复合材料性能的影响,结果表明:(1)由XRD证实已成功合成了钴铜锌铁氧体Co0.8-x Cux Zn0.2Fe2O4和钴铜锌铈铁氧体Co0.7Cu0.1Zn0.2Cex Fe2-x O4、聚吡咯(PPy)及PPy-Co0.7Cu0.1Zn0.2Fe2O4和PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4复合物,这和FT-IR结果相同;同时可以看出Co0.8-x Cux Zn0.2Fe2O4(x=0,0.1,0.2,0.3,0.4)和Co0.7Cu0.1Zn0.2Cex Fe2-x O4(x=0.05,0.1,0.15,0.2)为立方尖晶石结构,其粒径分别为47.8nm、62.1nm、58.8nm、59.3nm、58.0nm、50.0nm、51.9nm、47.6nm和42.5nm。晶格常数依次为0.839、0.833、0.833、0.836、0.836、0.833、0.936、0.837和0.838。(2)SEM图显示,Co0.8Zn0.2Fe2O4铁氧体的形貌各异,有球形、条形或棒状,还有一部分呈不规则片状,相互之间粘连比较紧密;Co0.7Cu0.1Zn0.2Fe2O4铁氧体为接近球形的小颗粒,并且粒子之间有一定的团聚现象,但团聚不是很紧密。PPy、PPy-Co0.7Cu0.1Zn0.2Fe2O4和PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4呈近球形,有一定的团聚现象,大小比较一致,结构比较规整。(3)VSM结果表明,Co0.7Cu0.1Zn0.2Fe2O4的Ms、Mr和Hc分别为83.6emu/g、33.35emu/g和454.54Oe,均大于Co0.8Zn0.2Fe2O4的值;随着铈离子的引入,其各项磁性参数均有所下降,Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4铁氧体的饱和磁化强度Ms=66.0emu/g、剩余磁化强度Mr=23.6emu/g和矫顽力Hc=341.56Oe;PPy-Co0.7Cu0.1Zn0.2Fe2O4的Ms、Mr和Hc分别为1.29emu/g、0.429emu/g和489.177Oe;PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4的Ms、Mr和Hc分别为5.75emu/g、2.00emu/g和437.97Oe。(4)矢量网络分析仪测试结果表明:当x=0.2时,Co0.8-x Cux Zn0.2Fe2O4铁氧体的ε’值最大,钴离子与铜离子的摩尔比的变化对ε’’和R影响很小;Co0.7Cu0.1Zn0.2Cex Fe2-x O4中当x=0.1时,ε’最大,其值在2.43-4.06范围内,且当频率在11.52GHz时ε’出现极大值4.06,Ce3+掺杂量的变化对ε’’的影响不大,其值均在-1.0-1.0之间,当x=0.2时,其值最大,当x=0.05时,其反射损耗最小,极小值为-1.427d B出现在12.4GHz;对于PPy-Co0.7Cu0.1Zn0.2Fe2O4,铁氧体在复合物中含量为15%时,复合物在18GHz附近出现极小反射损耗为-12.8d B;对于PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4,其ε’值在铁氧体质量分数为10%时达到最大,ε’’值在铁氧体质量分数为15%时达到最大,且极大值为3.33,出现在12.23GHz附近;铁氧体掺杂量对复合物反射损耗的影响不大,在频率约为12GHz和18GHz时,也出现了极小反射损耗-3.3d B。
[Abstract]:Cobalt-copper-zinc ferrite Co0.8-x Cux Zn0.2Fe2O4 (xl0. 0. 1) and cobalt, copper, zinc and cerium ferrite Co0.7Cu0.1Zn0.2Cex Fe2-x O4 (x0. 05) were synthesized by self propagating combustion (SHS). Polypyrrole / cobalt-copper-zinc ferrite (PPy-Co0.7Cu0.1Zn0.2Fe2O4) and polypyrrole / cobalt-copper-zinc cerium ferrite (PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4) composites were synthesized by in-situ polymerization. XRD,SEM,FT-IR, VSM and vector network analyzer were used to characterize the phase, morphology and electromagnetic properties of the composites, and the effects of the molar ratio of cobalt ion to copper ion and the amount of cerium ion doping on the properties of ferrite. The results show that: (1) Cobalt copper-zinc ferrite Co0.8-x Cux Zn0.2Fe2O4 and cobalt-copper-zinc cerium ferrite Co0.7Cu0.1Zn0.2Cex Fe2-x O _ 4 have been successfully synthesized by XRD, and the results show that: (1) Cobalt copper-zinc ferrite Co0.8-x Cux Zn0.2Fe2O4 and cobalt-copper-zinc cerium ferrite Co0.7Cu0.1Zn0.2Cex Fe2-x O _ 4 have been synthesized successfully by XRD. The results of polypyrrole (PPy) and PPy-Co0.7Cu0.1Zn0.2Fe2O4 and PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 complexes are the same as those of FT-IR. At the same time, it can be seen that Co0.8-x Cux Zn0.2Fe2O4 (x 0. 1 + 0. 2) and Co0.7Cu0.1Zn0.2Cex Fe2-x O 4 (x 0. 05 0. 1 0. 1 0. 150. 2) are cubic spinel structures, and their particle sizes are 47. 8 nm ~ (-1) and 58. 8 nm, respectively. 59.3nmnmnmnmc58.0nmH50.0nmONm ~ 51.9nm ~ 57.6nm and 42.5nm 路m ~ (-1). The lattice constants are 0.839 / 0.833 / 0.833 / 0.836 / 0.836 / 0.836 / 0.936 / 0.837 and 0.8388.38 respectively. (2) SEM diagrams show that the morphology of Co0.8Zn0.2Fe2O4 ferrite is different, with spherical, stripe or rod shape, and some with irregular flakes. The adhesion between each other is relatively close; Co0.7Cu0.1Zn0.2Fe2O4 ferrite is a small particle close to spherical, and there is a certain aggregation between the particles, but the agglomeration is not very close. PPy,PPy-Co0.7Cu0.1Zn0.2Fe2O4 and PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 are nearly spherical. (3) the results of VSM showed that the Ms,Mr and Hc of Co0.7Cu0.1Zn0.2Fe2O4 were 83.6 emu / g 33.35 emu / g and 454.54 Oe respectively, which were higher than that of Co0.8Zn0.2Fe2O4; With the introduction of cerium ion, the magnetic parameters decreased, and the saturation magnetization of Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 ferrite, Ms=66.0emu/g, residual magnetization Mr=23.6emu/g and coercivity Hc=341.56Oe; decreased. The Ms,Mr and Hc of PPy-Co0.7Cu0.1Zn0.2Fe2O4 were 1.29 emu / g and 489.177 Oe, respectively. The Ms,Mr and Hc of PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 are 5.75 emu / g 2.00 emu / g and 437.97 Oe. respectively. (4) the results of vector network analyzer show that when x = 0.2, The 蔚 'value of Co0.8-x Cux Zn0.2Fe2O4 ferrite is the largest, and the change of molar ratio of cobalt ion to copper ion has little effect on 蔚' and R; In Co0.7Cu0.1Zn0.2Cex Fe2-x O4, when x = 0.1, 蔚'is the largest and its value is in the range of 2.43-4.06, and the maximum value of 蔚'is 4.06% when the frequency is in 11.52GHz, and the change of doping amount of 4.06% Ce3 has little effect on 蔚'. Their values are between -1.0-1.0, when x = 0.2, their values are the largest, and when x = 0.05, their reflection loss is the smallest, and the minimum value is -1.427dB appearing at 12.4GHz; When the content of PPy-Co0.7Cu0.1Zn0.2Fe2O4, ferrite in the complex is 15, the minimal reflectance loss of the complex near 18GHz is -12.8 dB; For PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4, the 蔚 'value reaches the maximum when the ferrite mass fraction is 10, 蔚' value reaches the maximum when the ferrite mass fraction is 15, and the maximum value is 3.33, which appears near 12.23GHz. The ferrite doping content has little effect on the reflection loss of the complex. When the frequency is about 12GHz and 18GHz, there is also a minimal reflectance loss of -3.3 dB.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33
本文编号：2371672
[Abstract]:Cobalt-copper-zinc ferrite Co0.8-x Cux Zn0.2Fe2O4 (xl0. 0. 1) and cobalt, copper, zinc and cerium ferrite Co0.7Cu0.1Zn0.2Cex Fe2-x O4 (x0. 05) were synthesized by self propagating combustion (SHS). Polypyrrole / cobalt-copper-zinc ferrite (PPy-Co0.7Cu0.1Zn0.2Fe2O4) and polypyrrole / cobalt-copper-zinc cerium ferrite (PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4) composites were synthesized by in-situ polymerization. XRD,SEM,FT-IR, VSM and vector network analyzer were used to characterize the phase, morphology and electromagnetic properties of the composites, and the effects of the molar ratio of cobalt ion to copper ion and the amount of cerium ion doping on the properties of ferrite. The results show that: (1) Cobalt copper-zinc ferrite Co0.8-x Cux Zn0.2Fe2O4 and cobalt-copper-zinc cerium ferrite Co0.7Cu0.1Zn0.2Cex Fe2-x O _ 4 have been successfully synthesized by XRD, and the results show that: (1) Cobalt copper-zinc ferrite Co0.8-x Cux Zn0.2Fe2O4 and cobalt-copper-zinc cerium ferrite Co0.7Cu0.1Zn0.2Cex Fe2-x O _ 4 have been synthesized successfully by XRD. The results of polypyrrole (PPy) and PPy-Co0.7Cu0.1Zn0.2Fe2O4 and PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 complexes are the same as those of FT-IR. At the same time, it can be seen that Co0.8-x Cux Zn0.2Fe2O4 (x 0. 1 + 0. 2) and Co0.7Cu0.1Zn0.2Cex Fe2-x O 4 (x 0. 05 0. 1 0. 1 0. 150. 2) are cubic spinel structures, and their particle sizes are 47. 8 nm ~ (-1) and 58. 8 nm, respectively. 59.3nmnmnmnmc58.0nmH50.0nmONm ~ 51.9nm ~ 57.6nm and 42.5nm 路m ~ (-1). The lattice constants are 0.839 / 0.833 / 0.833 / 0.836 / 0.836 / 0.836 / 0.936 / 0.837 and 0.8388.38 respectively. (2) SEM diagrams show that the morphology of Co0.8Zn0.2Fe2O4 ferrite is different, with spherical, stripe or rod shape, and some with irregular flakes. The adhesion between each other is relatively close; Co0.7Cu0.1Zn0.2Fe2O4 ferrite is a small particle close to spherical, and there is a certain aggregation between the particles, but the agglomeration is not very close. PPy,PPy-Co0.7Cu0.1Zn0.2Fe2O4 and PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 are nearly spherical. (3) the results of VSM showed that the Ms,Mr and Hc of Co0.7Cu0.1Zn0.2Fe2O4 were 83.6 emu / g 33.35 emu / g and 454.54 Oe respectively, which were higher than that of Co0.8Zn0.2Fe2O4; With the introduction of cerium ion, the magnetic parameters decreased, and the saturation magnetization of Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 ferrite, Ms=66.0emu/g, residual magnetization Mr=23.6emu/g and coercivity Hc=341.56Oe; decreased. The Ms,Mr and Hc of PPy-Co0.7Cu0.1Zn0.2Fe2O4 were 1.29 emu / g and 489.177 Oe, respectively. The Ms,Mr and Hc of PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4 are 5.75 emu / g 2.00 emu / g and 437.97 Oe. respectively. (4) the results of vector network analyzer show that when x = 0.2, The 蔚 'value of Co0.8-x Cux Zn0.2Fe2O4 ferrite is the largest, and the change of molar ratio of cobalt ion to copper ion has little effect on 蔚' and R; In Co0.7Cu0.1Zn0.2Cex Fe2-x O4, when x = 0.1, 蔚'is the largest and its value is in the range of 2.43-4.06, and the maximum value of 蔚'is 4.06% when the frequency is in 11.52GHz, and the change of doping amount of 4.06% Ce3 has little effect on 蔚'. Their values are between -1.0-1.0, when x = 0.2, their values are the largest, and when x = 0.05, their reflection loss is the smallest, and the minimum value is -1.427dB appearing at 12.4GHz; When the content of PPy-Co0.7Cu0.1Zn0.2Fe2O4, ferrite in the complex is 15, the minimal reflectance loss of the complex near 18GHz is -12.8 dB; For PPy-Co0.7Cu0.1Zn0.2Ce0.05Fe1.95O4, the 蔚 'value reaches the maximum when the ferrite mass fraction is 10, 蔚' value reaches the maximum when the ferrite mass fraction is 15, and the maximum value is 3.33, which appears near 12.23GHz. The ferrite doping content has little effect on the reflection loss of the complex. When the frequency is about 12GHz and 18GHz, there is also a minimal reflectance loss of -3.3 dB.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33
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