A thermochemical pathway for controlled synthesis of AlN nanoparticles in non-isothermal conditions

作者：Nersisyan Hayk H; Yoo Bung Uk; Lee Kab Ho; Lee Jong Hyeon^*

来源：Thermochimica Acta, 2015, 604: 77-82.

DOI：10.1016/j.tca.2015.01.021

• Aluminum nitride
• Combustion synthesis
• Ammonium chloride
• Alumina
• Nanoparticle
• Morphology

The synthesis of AlN nanoparticles in non-isothermal high-temperature conditions was developed. The process involved Al2O3 Mg NH4Cl mixtures preparation and combustion in nitrogen atmosphere. Temperature profiles in the combustion waves were recorded by thermocouples, and the values of combustion temperature and wave velocity were determined from the recorded profiles. The existence of two independed combustion regimes with maximum temperatures of about 850 degrees C and 1400-1600 degrees C were revealed based on concentrations of NH4Cl. AlN nanocrystals were obtained and investigated by X-ray diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and Brunauer Emmett Teller surface area. AlN nanocrystals prepared under non-isothermal combustion process were comprised well distributed multi-faceted particles with an average size of 50-200 nm. The chemical reactions in the combustion wave were discussed and a possible thermochemical pathway for the synthesis of AlN nanoparticles was proposed.

• 出版日期2015-3-20