ITO/AZO double films were deposited by RF sputtering on p-Si texturized substrate to fabricate ITO/AZO/SiO 2 /p-Si SIS heterojunction. The structural, optics and electrical properties of the ITO/AZO films were charact...
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ITO/AZO double films were deposited by RF sputtering on p-Si texturized substrate to fabricate ITO/AZO/SiO 2 /p-Si SIS heterojunction. The structural, optics and electrical properties of the ITO/AZO films were characterized by UV-VIS spectrophotometer, four point probe, respectively. The results show that ITO/AZO films have good quality. The electrical junction properties were investigated by I-V measurement, which reveals that the heterojunction shows typical good rectifying behavior and great photoelectric effect.
The structural change in phase transition of hybrid(C12H25NH3)2MnCl4 was *** temperature and the structures of the phase transition is investigated by thermal gravimetry(TG)and differential scanning calorimetry(DSC),i...
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The structural change in phase transition of hybrid(C12H25NH3)2MnCl4 was *** temperature and the structures of the phase transition is investigated by thermal gravimetry(TG)and differential scanning calorimetry(DSC),infrared spectrum(IR)and X-ray diffraction(XRD).The results suggest that the phase transition is reversible and the structural change arises from the conformation change of the organic *** interlayer distance increases when the hybrid transforms from low temperature phase to high temperature *** is explained by the diffusion of gauche-bond along the organic chains and they move away from each other when the phase transition *** the experimental data with theoretical calculation,we propose that organic chain of the hybrid in high temperature phase is the conformation of gauche-bond alternating with trans bond(noted as GTG'TGTG'TGTG'T).
A theoretical model based on BCT lattice structure was developed. Resultant force in the BCT lattice structure was deduced, following the interaction force of two kinds of magnetic particles. According to empirical Fr...
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A theoretical model based on BCT lattice structure was developed. Resultant force in the BCT lattice structure was deduced, following the interaction force of two kinds of magnetic particles. According to empirical FroHlich-Kermelly law, the relationship between the magnetic induction and the magnetic field was discussed, and a predictive formula of shear stresses of the BCT lattice structure model was established for the case of small shear deformation. Compared with the experimental data for different particle volume fractions, the theoretical results of the shear stress indicate the effects of the saturation magnetization and the external magnetic field on the shear stress.
Surface-attached micropattemed polyelectrolyte brushes on planar solid surfaces are generated using free radical polymerization photo-initiated by self-assembled initiator monolayers. It is shown that the formed patte...
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Surface-attached micropattemed polyelectrolyte brushes on planar solid surfaces are generated using free radical polymerization photo-initiated by self-assembled initiator monolayers. It is shown that the formed patterns can be either negative or positive with different patterning processes.
Al12Si3.75Ge0.25O26 ceramic powder was prepared by sol-gel method using Al（NO3）3,Si（OC2H5）4 and Cl3GeCH2-CH2COOH as *** structural formation of Al12Si3.75Ge0.25O26 ceramic powder was analyzed by *** reduction by f...
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Al12Si3.75Ge0.25O26 ceramic powder was prepared by sol-gel method using Al（NO3）3,Si（OC2H5）4 and Cl3GeCH2-CH2COOH as *** structural formation of Al12Si3.75Ge0.25O26 ceramic powder was analyzed by *** reduction by flowing H2/Ar mixture gas,strong room temperature photoluminescence （PL） can be observed at 565 nm,613 nm,682 nm,731 nm and 777 nm,*** PL intensity scarcely depends on the reduction temperature and duration,while the sample reduced at 500 ℃ for A^3 hours has the highest PL *** and after reduction at 500 ℃,the volume of unit cell of mullite solid solution decreases to 0.4699 *** on the analysis of XPS and Raman spectra,it can be approved that the PL phenomenon at room temperature is caused by the embedded Ge nanoparticles with the average size of about 1.95 nm.
High-purity Ti2AlN ceramic was prepared at 1300 ℃ by hot pressing(HP)of Ti/Al/TiN powders in stoichiometric *** sintered product was characterized using X-ray diffraction(XRD)and MDI Jade 5.0 software(materials Data ...
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High-purity Ti2AlN ceramic was prepared at 1300 ℃ by hot pressing(HP)of Ti/Al/TiN powders in stoichiometric *** sintered product was characterized using X-ray diffraction(XRD)and MDI Jade 5.0 software(materials Data Inc,Liverpool,CA).Scanning electron microscopy(SEM)and electron probe micro-analysis(EPMA)coupled with energy-dispersive spectroscopy(EDS)were utilized to investigate the morphology *** results show that Ti2AlN phase is well-developed with a close and lamellar *** grains are plate-like with the size of 3-5 μm,thickness of 8-10 μm and elongated *** density of Ti2AlN is measured to be 4.22 g/cm3,which reaches 97.9% of its theory *** distribution of Ti2AlN grains is homogeneous.
To obtain homogenous layered oxide Li（Co1/3Ni1/3Mn1/3）O2 as a lithium insertion positive electrode material, the sol-gel process using citric acid as a chelating agent was applied. The material Li（Co1/3Ni1/3Mn1/3）...
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To obtain homogenous layered oxide Li（Co1/3Ni1/3Mn1/3）O2 as a lithium insertion positive electrode material, the sol-gel process using citric acid as a chelating agent was applied. The material Li（Co1/3Ni1/3Mn1/3）O2 was synthesized at different calcination temperatures. XRD experiment indicated that the layered Li（Co1/3Ni1/3Mn1/3）O2 material could be synthesized at a lower temperature of 800℃, and the oxidation state of Co, Ni, and Mn in the cathode confirmed by XPS were ＋3, ＋2, and ＋4, respectively. SEM observations showed that the synthesized material could form homogenous particle morphology with the particle size of about 200 nm. In spite of different calcination temperatures, the charge-discharge curves of all the samples for the initial cycle were similar, and the cathode synthesized at 900℃ showed a small irreversible capacity loss of 11.24% and a high discharge capacity of 212.2 mAh·g^-1 in the voltage range of 2.9-4.6 V.
The structure and properties of Mg-doped SrBi4Ti4O15（SBT） were dicussed. Mg substitution into SBT had two possibilities states with the dopant amount variety. Mg cation substituted mostly into Sr^2＋ and the amount ...
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The structure and properties of Mg-doped SrBi4Ti4O15（SBT） were dicussed. Mg substitution into SBT had two possibilities states with the dopant amount variety. Mg cation substituted mostly into Sr^2＋ and the amount proportion was 68.11%.Mg ion will substitute into Ti ion site in perovskite layer when the doping amount increases. Polarization increases sharply when x=0.1 and then decreases becauses of the domain pinning. The Curie temperature of Mg-doped SBT is about 300 ℃ and there is a broad diffuse phase transition near Tc with a flat peak near the Ta of SBT.
Amino-terminated polyethers and amino-terminated polyurethane were used as curing agent to cure the epoxy resin together and get a series of cured products. The damping properties of the composites were studied by DMA...
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Amino-terminated polyethers and amino-terminated polyurethane were used as curing agent to cure the epoxy resin together and get a series of cured products. The damping properties of the composites were studied by DMA test at different measurement frequencies. Damping mechanical tests show that the flexible epoxy resin has higher loss factor than common epoxy. The highest loss factor reaches 1.57. Also the height and position of loss factor peak of the flexible epoxy resin varies by changing the content of amino-terminated polyethers. Results shows that the flexible epoxy resin can be used as damping polymer materials at room temperature or in common frequency range.
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