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Comparative study on SrAl2O4 formation using different approaches

delete2022-05-01
delete6
PRE
AI
R
Radu Lazău
R
Robert Ianoş *
C
Cornelia Păcurariu
A
Aylin Căpraru
DOI:10.1016/j.ceramint.2022.01.205delete
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摘要

摘要

En 中文
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.
Keyword:
Powders: chemical preparation
Powders: solid state reaction
Sintering
Optical properties

期刊

Ceramics International 封面图
Ceramics International
IF:
5.6
论文数:
5.1W
被引数:
15.5W

机构

U
Universitatea Politehnica Timisoara
学者数:
2.0K
论文数: 1.4K
被引数: 2
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