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Transition metal dichalcogenides MS2 (M = Mo, W, Nb, Ta) have the lamellar structures similar to graphite. They are often used as solid lubricants in high/low temperature, high load, vacuum, in which oil lubrication is failed. We have synthesized WS2 nanotubes with decomposition method using Al2O3 template. Moreover, chemical vapor transportation reaction is used to produce NbS2 nanotubes in evacuated...
The WC-Co composite nano-coatings bonded strongly with steel substrate has been made by vacuum fusion sintering (VFS). Diffusion plays a crucial role in VFS processes, of which the atoms diffusion nearby interface is a vital variable which influences the interfacial bond strength. The atoms diffusion during the vacuum fusion sintering (VFS) process was firstly studied by molecular dynamics and by...
The golden-like (Ti, Zr)N film with nanometer level, which has higher rigidity and better corrosion resistance than TiN film, was deposited by reactive magnetron sputtering on slides and Al substrates. The crystalline phase was analyzed by XRD, morphology and electronic structures were detected by atomic force microscopy (AFM) on AFM.IPC-208B developed by Chongqing University. The results of XRD show...
Sn-Ag-O thin films were deposited by DC magnetron co-sputtering in a gas mixture of Ar and O2. The microstructure and morphology of the thin films were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). The Sn2.3 AgO0.9 and Sn1.3AgO0.6 film films deposited at room temperature showed a mixture of crystalline and glassy structure in XRD patterns, whereas...
The SrAl2O4: Eu2+, Dy3+ phosphor nanoscale powders with high brightness were prepared by a nano-coating process. The resulted SrCO3@ Al2O3 core-shell precursors were characterized by transmission electron microscope (TEM), which indicates that the precursor particles have narrow size distribution. The structure and optical properties of the phosphor powders were investigated systematically by means...
Magnetite (Fe3O4) nanoparticles uniformly loaded on multi-walled carbon nanotubes (MWCNTs) were synthesized by a wet chemistry method, and then carbon coated Fe3C nanoparticles supported by MWCNTs were prepared by heat-treatments subsequently in nitrogen at 600 degC and in acetylene atmosphere at 500 degC. The as-prepared nanoparticles were all single crystals with a size distribution ranging from...
In this research, by adding methyl alcohol/water solution with certain concentration into sol to hydrolysis directly and sintering the fresh gel directly, lead titanate ceramics doped with calcium are prepared by using calcium acetate as doper to prohibit the disadvantages contained in conventional sol-gel method, such as low hydrolytic rate, high sintering temperature, long preparation period. The...
In order to study antibacterial properties of nanometer TiO2 thin films, nanometer Fe3+-TiO2 films have been prepared on glass by RF magnetron co-sputtering method. The films were characterized by SEM, XRD, and XPS. The influence of Fe element and calcination temperature on the films structure was investigated. The principle of substitution impurity to improve the activity was discussed. The bactericidal...
ZnS thin films were obtained with modified chemical bath deposition (CBD). The parameters which concern the growth and properties of the films including the concentration of the sources, pH value of the solution, the deposition temperature were optimized. A variety of complexing agents were employed, which played important roles in the formation of the thin films. The microstructure and the optical...
Nd3+ doped PbZr0.52Ti0.48O3 (PNZT) nanopowders were prepared by sol-gel methods in ethylene glycol system. Neodymium nitrate was used as Nd3+ source. The reaction mechanisms of nanopowder preparing process from the sol were discussed through using FTIR, XRD, TG-DTA, and it was proved that the heating temperature of PNZT was 50degC-100degC higher than PZT. PNZT lattice structure was characterized...
It is well known that the morphology is one of the most important factors to affect the dielectric properties of polymeric nanocomposites. In this work, it is thought that the interfacial interaction between nanoparticles and polymer matrix is one of the most important factors affecting the crystalline morphology of the nanocomposites. So the effects of the surface-treatment of CaCO3 nanoparticle...
GaN nanorods with vertebra-like morphology were synthesized by nitriding Ga2O3/ZnO films at 1000degC for 20min. Ga2O3 thin films and ZnO middle layers were pre-deposited in turn on Si(III) substrates by r.f. magnetron sputtering system. In the flowing ammonia ambient, ZnO was reducted to Zn and Zn sublimated at 1000degC. Ga2O3 was reducted to Ga 2O and Ga2O reacted with NH3 to synthesize GaN nanorods...
A new microactuator design was fabricated to make a qualitative researcher on the PZT (Pb(Zr,Ti)O3) piezoelectric thin film. A novel V type valve geometry structure enables fluid pumping. The PZT thin films were used to fabricate multi-layer driving membrane for microactuator by its piezoelectric response. As the key technology of driving membrane, the Si /SiO2/Ti /Au /PZT/Cr/Au multi-layer film preparation...
Fe3O4 single crystal nanoparticles were prepared in zero field and in a magnetic field. Fe3O4 with well crystallinity is achieved in a magnetic field. X-ray diffraction, transmission electron microscopy, vibrating sample magnetometer and Mossbauer spectrum analysis have confirmed that the magnetic field results in increasing crystallinity, such as decrease surface spin disorder and cation vacancies...
Fe3O4 magnetofluid was prepared by means of a reduction in situ and coordination transformation method. The infrared spectra showed the existence of complex. Coordination stability constant and coordination number was 1.12times104 and 2.05, respectively. The X-ray diffraction results indicated that all the ferric oxide obtained was Fe3O4. The transmission electron microscope image illustrated the...
Spindle-type α-Fe2O3 nanoparticles have been synthesized via a hydrothermal method, using Fe(NO3)3, NH4Cl and ethylene glycol as starting precursors. The resultant products were characterized by means of Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer...
This study produces low-temperature poly-silicon (LTPS) film by aluminum induced crystallization (AIC) method on Corning Eagle2000 glass substrate. Through the control of different sputtering power in depositing aluminum film, five kinds of specimens with sputtering power of 100, 200, 400, 800 and 1600 Watts, respectively, are made. Crystal quality, surface morphology, roughness and film residual...
Lead zirconate titanate (PZT) powder with fibroid morphology was prepared via hydrothermal synthesis and heat treatment using organic mineralizer, tetramethylammonium hydroxide pentahydrate (TMAH). The structure and morphology of the resultant fibers were investigated by X-ray diffraction (XRD) analysis and transmission electron microscope (TEM) observation, The TMAH concentration, hydrothermal reaction...
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