Synthesis of B۴C - Nano TiB۲ Composite Nano Powder by the Chemical Precipitation Method

The aim of this research is to determine the proper concentration of Titanium Tetra IsoPropoxide (TTIP) and select the right temperature and time of calcinations for the synthesis of B۴C-nano TiB۲ composite Nano powder by the chemical precipitation method. For this purpose, first, solutions with TTIP molar concentrations of ۰.۱, ۰.۰۵ and ۰.۰۳ were prepared and the optimal molar concentration of TTIP was determined to be ۰.۰۵. Then, a diluted solution of distilled water and TTIP was mixed with Isopropanol Alcohol containing B۴C micropowder. In this mixture, Titanium Hydroxide nanoparticles were initially synthesized and then, to convert the Ti(OH)۴ to TiB۲, the above mixture were calcined in a furnace, under Argon atmosphere. The calcination process was carried out at temperatures of ۷۵۰, ۱۰۰۰ and ۱۲۵۰ ºC. It was observed that the most suitable temperature for the formation of the TiB۲ phase is ۱۲۵۰ ºC and that the lower temperatures only lead to the formation of the TiO۲ phase. It was also observed that, at the calcination temperature of ۱۲۵۰ ºC, the most appropriate time duration for the conversion of Ti(OH)۴ nanoparticles to TiB۲ nanoparticles is ۳۰ minutes, during which B۴C-nano TiB۲ composite Nano powders form, with most of the TiB۲ particle sizes being in the range of ۳۰-۶۰ nm.

Keywords:

B۴C-nano TiB۲ , Chemical precipitation , Nano powder , TTIP