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ZnO films and their Er-doped films oriented in c-axis were prepared on silicon substrate (100) by frequency magnetron sputtering method, and they were taken in heat treatment. Then, the influences on the surface morphologies and crystal structures of the film samples, which were made by the different annealing temperatures and doping concentrations, were analyzed through observing the treatment of...
Gallium nitride (GaN) nanofibers have been produced using electrospinning and a precursor solution composed of gallium nitrate and a cellulose acetate solution. The electrospun fibers were thermally decomposed at 400??C under a nitrogen flow and nitridized under ammonia at 900??C. Scanning electron microscopy (SEM) and profilometry confirmed the production of fibers with diameters ranging from 20...
One new technique was introduced preparing high-efficiency flocculant: polyaluminium chloride (PAC) with the materials of AlCl3-6H2O. Effect of preparing conditions on quality and separation of PAC was tested. The optimal preparing method was: baking temperature 290degC; baking time 30 min; maturation time 18 h; liquids laying aside time 12 h. The structure and form of PAC was studied by scanning...
The barium titanate powders having average crystallite sizes of 60 to 2000 nm have been prepared by calcination of barium titanyl oxalate (BTO) at temperatures of 700 divide1150degC. Morphology, recrystallization kinetics and crystalline structure of the barium titanate powders have been studied using the SEM and X-ray methods. The PTCR ceramics of (BaCaPb)TiO3 compound have been produced by using...
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