ALUMINOTHERMIC REDUCTION OF K2TiF6 TO PREPARE TiC, TiB2, AND TiN NANOPARTICLES

作者：Kim D Y; Lee Y J; Lee T H; Lee K H; Nersisyan H H; Han M H; Jeong S U; Kang K S; Bae K K^*; Lee J H

来源：Combustion Science and Technology, 2014, 186(1): 90-101.

DOI：10.1080/00102202.2013.846909

• Aluminothermic reduction
• Combustion synthesis
• Combustion temperature
• Nanoparticles
• Titanium carbide

Aluminothermic reduction of K2TiF6 in the presence of C, B, or N-2 was investigated as a low exothermic combustion process for synthesizing nanoparticles of titanium ceramics such as TiC, TiB2, and TiN. Sample pellets were prepared by mixing powders of K2TiF6, Al, and non-metal (C, B) powders in stoichiometric ratios. Experiments were conducted at room temperature under either an Ar or N-2 atmosphere. The combustion parameters were estimated from the temperature-time profiles, measured in the combustion wave using thermocouples. The reaction drastically proceeds within seconds, raising the temperature to 890-1170 degrees C. The size of TiC, TiB2, and TiN nanoparticles prepared by the developed approach were, respectively, 5-30nm, 10-60nm, and 70-100nm.

• 出版日期2014-1-2