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掺杂聚苯胺磁化率的研究 总被引:6,自引:0,他引:6
分别研究了浓H2SO4掺杂本征态聚苯胺(PAn)、HCl掺杂PAn以及FeCl3掺杂这两种聚安在地的磁化率。通过研究磁化率的变化曲线,我们得到了一些有意义的结果:浓H2SO4掺杂PAa和HCl掺杂PAn的磁化率变化规律不同;FeCl3掺杂浓H2SO4-PAn材料可以获得比FeCl3掺杂HCl-PAn材料更高的磁化率;FeCl3在掺杂HCl-PAn材料和浓H2SO4-PAn材料时,FeCl3在这两种 相似文献
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研究了n-β(氨乙基)-γ(氨丙基)三乙氧基硅烷(NH2(CH2)2NH(CH2)3Si(OEt)3)与二甲基二乙氧基硅烷(CH3)2Si(OEt)2)共水解,制备含(CH2)3NH(CH2)2NH2功能基的聚硅氧烷配位体,用IR,^1HNMR和元素分析法对水解产物分析证明,NH2(CH2)2NH(CH2)3Si(OEt)3与(CH3)2Si(OEt)2进行了共水解反应,而且水解程度随NH2(CH 相似文献
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Sol—Gel法合成K(Ta,Nb)O3材料 总被引:5,自引:3,他引:2
以金属醇盐乙醇钾[K(OC2H5)],乙醇铌[Nb(OC2H5)5]和乙醇钽[Ta(OC2H5)5]为原料,用Sol-Gel法合成了K(Ta,Nb)O3超细粉末和薄膜,研究了工艺参数如前驱体溶液浓度、热处理温度等因素对材料结构及物性的影响。粉料的粒径为20 ̄40nm,所需合成温度约为700℃,比通过传统的固相反应制备同种材料的合成温度低近100℃;以SrTiO3(100)单晶作基片,采用匀胶法获得 相似文献
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掺杂聚苯胺吸波材料的研究 总被引:16,自引:0,他引:16
采用3cm波导式测量线在8 ̄14GHz频率范围内,用多点拟合的实验和计算方法对掺杂聚苯胺的微波吸收特性及参量进行了研究。发现:浓H2SO4掺杂本征态聚苯胺(PAn)所合成材料的电脶耗很小、磁损耗较大(相对于盐酸聚苯胺而言)且不利于对微波的吸收;FeCl3掺杂浓H2SO4-PAn材料可合成磁损耗较高、基本上有利于吸收微波的材料;更令人注意的是,利用HCl-PAn具有较大的电损耗,浓H2SO4-PAn 相似文献
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本文利用水热合成方法对MSnO3和MSn(0.5)Zr(0.5)O3(M=Sr,Ba)的合成进行了研究,并采用XRD、SEM和ICP等方法对产物进行了表征,结果表明:在M(OH)2-SnO2(或SnO2+ZrO2)-KOH体系中,当KOH/Sn和KOH/(Sn+Zr)≥30时,260℃下晶化5~7天,可获得MSnO3和MSn(0.5)Zr(0.5)O3纯相,在M(OH)2-(SnO2+ZrO2)-KOH-H2O体系中,可通过控制介质碱度来获得MSnO3+MZrO3混合物和MSn(0.5)Zr(0.5)O3,并根据合成规律初步探讨了反应过程. 相似文献
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以金属醇盐乙酸钾[K(OC2H5)],乙醇铌[Nb(OC2H5)5]和乙醇钽[Ta(OC2H5)5]为原料,用Sol-Gel法合成了K(Ta,Nb)O3超细粉末和薄膜,研究了工艺参数如前驱体溶液浓度、热处理温度等因素对材料结构及物性的影响.粉料的粒径为20~40nm,所需合成温度约为700℃,比通过传统的固相反应制备同种材料的合成温度低近100℃;以SrTiO3(100)单晶作基片,采用匀胶法获得了沿(100)高取向生长的K(Ta0.65Nb0.35)O3薄膜,薄膜表面均匀、致密,室温时呈立方相晶格结构.研究表明,选择物理性质相似、晶格常数相匹配的材料作基片,适当控制工艺参数,尤其是前驱体溶液的浓度、升降温速度及烧结温度是获得优质薄膜的关键. 相似文献
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本文利用水热合成方法对MSnO3和MSn0.5Zr0.5(M=Sr,Ba)的合成进行了研究,并采用XRD、SE几ICP等进行产物进行了表征,结果表明:在M(OH)2.SnO2(呈SnO2+ZrO2)-KOH体系中,当KOH/Sn和KOH(Sn+Zr)≥30时,260℃下晶化5-7天,可获得MSnO3和MSn0.5O3纯相,在M(OH)3-(SnO2+ZrO3)-KOH-H2O体系中,可通过控制介质 相似文献
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以无机盐Nb2O5、Mg(NO3)2、Pb(NO3)4、Co(NO3)2、Fe2(NO3)3为原料,柠檬酸和EDTA为络合剂,分别制备了Nb5+、Mg2+、Pb2+、Co2+、Fe3+等离子的络合溶液。采用络合法制备了铌酸镁-铁酸钴先驱体(MgNb2O6-CoFe2O4,简称MN-CFO)。此先驱体在1000℃煅烧1h后,得到纯净的MgNb2O6-CoFe2O4固溶体。采用液相包裹法制备了铌镁酸铅-铁酸钴(Pb(Mg1/3Nb2/3)O3-CoFe2O4)先驱体,在1000℃煅烧1h,Pb(Mg1/3Nb2/3)O3-CoFe2O4先驱体分解为具有铁电相Pb(Mg1/3Nb2/3)O3和铁磁相CoFe2O4的复相组织。研究了10%过量的PbO对煅烧过程中烧绿石相向铁电相的转变作用,并在700℃煅烧5h条件下制备了不含烧绿石相的Pb(Mg1/3Nb2/3)O3-CoFe2O4固溶体。 相似文献
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研究了以焦炉煤气为原料在BaCo0.7Fe0.2Nb0.1O3-δ(BCFNO)透氧膜反应器中制合成气。实验结果表明,BCFNO膜反应器的自催化性能差。加入催化剂后,膜反应器的重整性能得到明显提高,在875℃,焦炉煤气中甲烷转化率为87.0%,产物中氢气和一氧化碳选择性分别为78.3%、105.6%,透氧量达到15.8ml/(cm2.min)。焦炉煤气中的甲烷在膜反应器中反应路径为首先焦炉煤气中的氢气与膜片透过去的氧反应生成水,然后甲烷再与水重整生成氢气和一氧化碳。实验过程中,透氧膜没有出现破裂,BCFNO透氧膜反应器在富氢的焦炉煤气下显示出很好的稳定性。 相似文献
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An inorgano-organic ion exchanger, Sn(IV) phenyl phosphonate, has been synthesized in amorphous form. Further, an attempt
has been made to synthesize Sn(IV) phenyl phosphonate in the nano form. The materials have been characterized for elemental
analysis (ICP-AES), thermal analysis (TGA), X-ray analysis and FTIR spectroscopy. Chemical resistivity of these materials
has been accessed in acidic, basic and organic solvent media. Catalytic activity has been studied and compared by using esterification
of ethylene glycol as a model reaction wherein glycoldiacetate has been prepared. The transport properties of these materials
have been explored by measuring specific proton conduction at different temperatures using SOLARTRON DATASET impedance analyser
over a frequency range 1 Hz-1 MHz. It has been observed that Sn(IV) phenyl phosphate in the nano form behaves as a better
Bronsted catalyst and proton conductor as compared to the amorphous form. 相似文献
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利用~1H—~1H COSY,HMQC等2D NMR技术对一种新的配体N—(对硝基苯基)—N’—(甲氧基羰基)硫脲(H_2pmt(Ⅰ)进行~1H、~(13)C NMR谱数据分析与归属;对于它与Cu~+离子配位的化合物Cu(H_2pmt)_2Cl(2)也作了~1H、~(13)C NMR的测定,归属了它们的所有谱线,对于它们的化学位移与配位行为作了简单讨论。 相似文献
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The critical current lc of Nb3Sn conductors containing 1615 or 3721 filaments was measured in magnetic flux densities up to 18 T. The magnetic field was generated by a Bitter magnet. The overall current density of the conductor was at 10 T and 5 × 103 A cm?2 at 18 T. Values of up to 21.6 T were obtained for the upper critical flux density Bc2. The influence of the diffusion conditions upon lc, Bc2 and the superconducting transition temperature Tc have been related to the fraction of the total conductor cross-section taken up by Nb3Sn. This fraction serves as a rough measure of the pressure exerted upon the Nb3Sn within the conductor. 相似文献
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Noticeable lowering of the energy gaps have been achieved for the layered perovskite K(2)La(2)Ti(3)O(10) as a result of the attempts made to incorporate Sn(2+) and N(3-) ions. Incorporation of Sn(2+) ions was carried out by the ion-exchange reaction of K(2)La(2)Ti(3)O(10) with aqueous tin(II) chloride solution. Nitrogen incorporation was attempted by the solid state reaction of the parent oxide with urea around 400 °C in air. The resultant oxides have been characterized by power X-ray diffraction, UV-visible diffuse reflectance spectroscopy, and Fourier transform infrared spectroscopy. Room temperature ion-exchange was sufficient to introduce Sn(2+) ions with the resulting product of composition (Sn(0.45)K(0.2)H(0.9))La(2)Ti(3)O(10) · H(2)O. Visible light absorption was observed with the absorption edge red shift of ~ 100 nm from that of the parent K(2)La(2)Ti(3)O(10). The lowering of the band gap was as expected by the contribution of Sn 5s orbitals to the O 2p orbitals in the formation of the valence band. Nitridation using urea resulted not only in nitrogen doping but with the additional sensitization by the presence of carbon nitride (CN) polymers, which again resulted in visible light absorption. The product oxides obtained as a result of cation and anion intended substitutional studies have been found to be useful for the visible light photocatalytic decomposition of organic dyes such as rhodamine B. 相似文献
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以水热反应法制备了ZrW2O7(OH)2(H2O)2粉体,利用TG-DTA、XRD、DRS和BET等手段对其理化性能进行表征,并考察了其在紫外光照射下分别以CH3OH为电子给体和以AgNO3为电子受体时的光解水产氢产氧性能.结果表明:制备的样品为结晶良好且晶相单一的四方相ZrW2O7(OH)2(H2O)2粉体,吸收边为310nm,带隙值为3.9eV,比表面积为5.9m2/g.在以CH3OH为电子给体的条件下,0.3wt%Pt/ZrW2O7(OH)2(H2O)2的光解水产氢平均速率为3.7μmol/h,以AgNO3为电子受体的条件下ZrW2O7(OH)2(H2O)2的产氧平均速率为27.8μmol/h.本研究表明,包含OH基的ZrW2O7(OH)2(H2O)2具有光解水产氢产氧能力,能带结构符合光解水要求,是一种新型的光解水材料. 相似文献