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Phase-controlled solvothermal synthesis has been proposed for the synthesis of nickel sulfide of single phase including α-NiS, Ni3S4 and NiS2 by tuning the reaction time and the addition of surfactant. The phase evolution of nickel sulfide proceeds with the increase of sulfur stoichiometry with longer reaction time in the presence of surfactant. With the addition of hexadecyl-trimethyl-ammonium bromide...
C f –Si 3 N 4 sandwich composites were prepared by gelcasting using α-Si 3 N 4 powder, SiC-coated carbon fibers and sintering additives as starting materials. The microstructure and composition, dielectric properties of C f –Si 3 N 4 sandwich composites were investigated. SEM and EDS analysis results reveal that the SiC interphase could...
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