ZrO2, CuO, Al2O3 and SiO2 mixed nanopowder was used to coat the head of sapphire single crystal fiber for improving the properties of high-temperature single crystal fiber sensor. The result indicates that the head co...ZrO2, CuO, Al2O3 and SiO2 mixed nanopowder was used to coat the head of sapphire single crystal fiber for improving the properties of high-temperature single crystal fiber sensor. The result indicates that the head coated with above mixed nanopowder shows better optical stability, shorter response time and higher thermal shock resistance, in comparison with the head coated with coarse-grained particles with the same chemical compositions.展开更多
A fine polycrystalline ZnO thin film with 0.3 similar to 0.6 mu m grain size was obtained by sol-gel process and a consequential heat treatment at 500 degrees C. The process of preparing ZnO thin film was analysed. Th...A fine polycrystalline ZnO thin film with 0.3 similar to 0.6 mu m grain size was obtained by sol-gel process and a consequential heat treatment at 500 degrees C. The process of preparing ZnO thin film was analysed. The sensitivity and conductivity of ZnO thin films as combustible gas (CO, CH4, H-2) sensor as well as the influence of catalyst and pH value of the precursor on its sensitivity were studied in detail. The structure characteristics of ZnO thin film by different process were investigated by X-ray diffraction, thermal analysis and photoelectron spectrometer. The atomic ratio of Zn to O on the surface of ZnO thin film was found to be 1.14:1 measured from XPS result. The conductivity of the thin film increases greatly when doped with Al3+ ion but decreases while doped with Na+ ion.展开更多
L0-(+)-diethyl tartrate was bound to hydroxymethyl polystyrene bead as a chiral stationaryphase in high-performance liquid chromatography(HPLC) for the resolution of pharmaceuticallyracemic compounds, such as D,L-amyg...L0-(+)-diethyl tartrate was bound to hydroxymethyl polystyrene bead as a chiral stationaryphase in high-performance liquid chromatography(HPLC) for the resolution of pharmaceuticallyracemic compounds, such as D,L-amygdalic acid, D,L-brufen, and D,L-phenylephrine in an isocraticelution mode.展开更多
文摘ZrO2, CuO, Al2O3 and SiO2 mixed nanopowder was used to coat the head of sapphire single crystal fiber for improving the properties of high-temperature single crystal fiber sensor. The result indicates that the head coated with above mixed nanopowder shows better optical stability, shorter response time and higher thermal shock resistance, in comparison with the head coated with coarse-grained particles with the same chemical compositions.
文摘A fine polycrystalline ZnO thin film with 0.3 similar to 0.6 mu m grain size was obtained by sol-gel process and a consequential heat treatment at 500 degrees C. The process of preparing ZnO thin film was analysed. The sensitivity and conductivity of ZnO thin films as combustible gas (CO, CH4, H-2) sensor as well as the influence of catalyst and pH value of the precursor on its sensitivity were studied in detail. The structure characteristics of ZnO thin film by different process were investigated by X-ray diffraction, thermal analysis and photoelectron spectrometer. The atomic ratio of Zn to O on the surface of ZnO thin film was found to be 1.14:1 measured from XPS result. The conductivity of the thin film increases greatly when doped with Al3+ ion but decreases while doped with Na+ ion.
文摘L0-(+)-diethyl tartrate was bound to hydroxymethyl polystyrene bead as a chiral stationaryphase in high-performance liquid chromatography(HPLC) for the resolution of pharmaceuticallyracemic compounds, such as D,L-amygdalic acid, D,L-brufen, and D,L-phenylephrine in an isocraticelution mode.
