Orthogonal Design-Assisted Solvothermal Strategy for Preparing Silicon Nitride Nanodendrites on a Large Scale

摘要

We demonstrate herein the orthogonal strategy for preparing Si_3N_4 dendrites at low temperatures using NaN_3, SiCl_4, and Mg powder as the starting materials. The reaction conditions, such as dose of Si_3N_4 and Mg, reaction temperature, and reaction time, were investigated in detail. Magnified experiments were carried out in an autoclave with a capacity of 1 L and Si_3N_4 dendrites were obtained with a conversion ratio of 53.08% calculated from the amount of the limited reactant NaN_3 (because NaN_3 is relatively expensive). Estimated from die magnified experiments, the cost of Si_3N_4 is much less than the market price, which indicates that this is a promising process for industrial application.