本项目拟从原位自生氮化硅烧结助剂，生坯与烧结致密化等方面入手，探讨解决注凝成型技术制备的石英陶瓷制品烧结致密性不高等问题。采用反应热力学与动力学等方法分析蔗糖热解与碳热还原氮化自生氮化硅助剂反应转变过程，探索制备过程中多因素条件对原位生成助剂转化率及粉体微观结构影响规律，构建自生氮化硅助剂精确可控理论模型；通过注凝成型技术理论，揭示石英陶瓷生坯整个制备过程相关的物理化学变化过程，明晰生坯高致密化机制；结合JMA方程、Arrhenius方程与Augis-Bennett方程拟合计算，研究该体系烧结的晶化动力学，利用Frenkel烧结公式，构建该体系烧结活化能的数学模型，进而探索在抑制析晶前提下致密化机理。本项目研究为解决注凝成型太阳能级熔融石英陶瓷高均质致密化关键问题提供新的思路，研究结果具有很强的理论应用与工程实用价值。

Starting with authigenic silicon-nitride sintering additives, through studying green body and sintering densification, the solution of fused silica ceramic's lower sintering compactness which prepared by gel-casting technology was explored in this project. Using reaction thermodynamics and dynamics, the sucrose pyrolysis and carbothermal reduction authigenic silicon-nitride additives reaction process were analyized. Meanwhile, the influence law of multivariate conditions on conversion of situ generation additives and powder microstructure in preparation process were also explored , and the accurate and controllable theoretical model of authigenic silicon-nitride additives was constructed. Through note cemented type technology theory, the relative physical chemical changes of quartz ceramic body's through the preparation process was revealed, and high densification mechanism of green body was clarified. Combined with fitting calculation of JMA equation, Arrhenius equation and Augis-Bennett equation, crystallization kinetics of sintering system was studied. Using Frenkel sintering formula, the mathematical mode of sintering activation energy of this system was constructed, and the densification mechanism under inhibition crystallization premise was explored. This project offered new thinking in injection setting molding Solar fused silica ceramic's high homogeneous densification , the research results had strong theoretical and practical value.