Papers by Keyword: Silicon Tetrachloride

Abstract: Precipitated silica was prepared by the hydrolysis of silicon tetrachloride in a dilute solution of soluble glass. In order to identify the optimal synthesis conditions of preparing silica powder with the good dispersivity and uniformity, technical parameters such as volumes of polyethylene glycol(PEG) and anhydrous ethanol, reaction temperature, final solution pH and the concentration of soluble glass were investigated. Products were characterized by scan electron microscopy(SEM),transmission electron microscopy(TEM), infrared spectroscopy(IR), x-ray diffraction(XRD) and laser nano-particle size analyzer. Under the optimal formation condition, amorphous silica particles with average diameters of 284nm and irregular-shaped morphology were obtained.

Abstract: Silicon was electrodeposited by electrochemical reduction of silicon tetrachloride in propylene carbonate solvent on an alloy of nickel-titanium-niobium and nickel, which were used as working electrodes respectively. The effect of two substrates as working electrodes on the electrodeposition ability of the silicon was investigated by scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDS). Results show that using an alloy of titanium, nickel and niobium as working electrode is better than nickel in the morphology and deposition yield of silicon.