采用控温活化手段实现了燃烧合成α-Si3N4粉末.通过对反应温度特征曲线的分析,得出了Si-N体系的一系列燃烧反应动力学参数,包括燃烧波速、升温速率、绝热温升、惰性温升时间、惰性温降时间和转化率等,另外采用波速法和转化率法计算了该反应体系的活化能.这些参数将为进一步研究该反应的机理、优化燃烧合成工艺提供指导.
Combustion synthesis of α-Si3N4 was carried out through a chemical activation method under controlled temperature. Temperature profile analysis
was carried out to determine the kinetics of combustion synthesis of α-Si3N4. The kinetic parameters included the combustion
wave velocity, the rate of temperature increase, the adiabatic temperature rise, the inert temperature rise time and the inert temperature decay
time, as well as the convention ratio of Si to Si3N4. Two methods, i. e., temperature profile analysis method and wave velocity method were
used to calculate the activation energy of combustion reaction of silicon in pressurized nitrogen. The kinetics analysis will provide guideline for
understanding the reaction mechanism and optimizing the processing parameters.
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