Prompt Description

Draw a flowchart of the experimental procedure: Add 2.3 mL of TiCl4 to 10 mL of ethanol solution and stir the solution for 2 h. During this period, add 16.8 g of urea to obtain a homogeneous precursor solution. Pyrolyze the precursor in a tube furnace under N2 atmosphere to prepare TiN porous ceramics. The sintering temperature is set to 800℃, the heating rate is 10 K/min, and the holding time is 5 h.