Comparative study on SrAl2O4 formation using different approaches

A comparative study on SrAl2O4 synthesis via solid-state reaction and combustion synthesis was performed, based on thermodynamic calculations and resulted sample characteristics. We proposed a first-time approach of the combustion synthesis using metal perchlorates and a fuel mixture of urea and glycine. The calculated adiabatic temperature of the combustion reaction was 2807 ? and the standard enthalpy of reaction was - 6093 kJ/mol SrAl2O4. The recorded temperature during the highly exothermic combustion reaction was 1757 ?. The solid-state reaction was endothermic, with a standard enthalpy of reaction of 330 kJ/mol SrAl2O4. The precursor mixtures and obtained samples were characterized and compared in terms of temperature behavior, phase composition, crystallite size, specific surface area and morphology. The results prove the superiority of the proposed approach in terms of thermal efficiency and open a new perspective upon the use of strontium and aluminum perchlorates in the combustion synthesis of highly crystalline SrAl2O4-based materials, such as SrAl2O4: Eu, Dy phosphors.

Automated summary

A comparative study was conducted on the synthesis of SrAl2O4 using solid-state reaction and combustion synthesis. The results showed the superiority of the combustion synthesis method in terms of thermal efficiency. This study also opened up new perspectives on using perchlorates to synthesize highly crystalline SrAl2O4-based materials.