植物遗态多孔结构存留、演变与轻质隔热耐火材料性能的相关性

Preparation of lightweight thermal insulation refractory from plant pore-forming agent usually have some drawbacks such as elastic deformation, hygroscopic expansion and the contradiction between high strength/low thermal conductivity and thermal shock resistance. In order to solve these problems, the effects of physicochemical conditions on the morph-genetic pore structure evolution of botanical pore-forming agent with different elastic moduli were investigated based on the inorganic sol-coated plant pore-forming agents. The morph-genetic pore structure protection method and physical and chemical conditions of elastic deformation behavior control were also investigated. Besides, the multi-level and multi-dimensional plant morph-genetic pore structure was introduced into the lightweight thermal insulation refractory to establish the mathematical model of the pore structure of the light weight insulation refractory under high temperature and correlations between the pore parameters and the thermal conductivity, strength and thermal shock resistance of the lightweight thermal insulation refractories were investigated. Moreover, the synergistic mechanism of high strength/low thermal conductivity and thermal shock resistance of lightweight thermal insulation refractory was clarified. Thus, the collaborative design of enhancement, toughening and thermal insulation of lightweight thermal insulation refractory was achieved by controlling the pore structure, in situ grain morphology in struts, the growth and development conditions and the thickness and phase of the interface between the plant morph-genetic pore structure and the material. This will provide new content to deepen the comprehensive utilization of waste resources and the basic theory of the preparation of lightweight thermal insulation refractory.

针对目前植物造孔剂燃烬物法制备轻质隔热耐火材料存在弹性形变和吸湿膨胀、轻质隔热耐火材料中高强/低导热与热震稳定性相矛盾等问题，项目采用无机溶胶对植物造孔剂进行包覆，研究物理化学条件对不同弹性模量植物造孔剂遗态结构的演变规律，探明其遗态结构保护方法和弹性形变行为控制的理化条件；将多层次、多维植物遗态管孔结构引入轻质隔热耐火材料中，建立高温复杂情况下轻质隔热材料孔结构的数理模型，研究孔结构参数与轻质隔热耐火材料导热系数、强度和热震稳定性的相关性，阐明轻质隔热材料高强度/低导热与热震稳定性的协同机理，通过控制孔隙结构、孔筋原位形成无机相的晶型与生长发育条件及植物遗态管孔结构与材料界面结合层的厚度与物相组成，达到材料的增强、增韧、隔热的协同设计，为深化废弃资源综合利用和轻质隔热材料制备技术的基础理论增加新的内容。

针对目前植物造孔剂燃烬物法制备轻质隔热耐火材料存在弹性形变和吸湿膨胀、轻质隔热.耐火材料中高强/低导热与热震稳定性相矛盾等问题，项目采用无机溶胶对植物造孔剂进行包.覆，研究物理化学条件对不同弹性模量植物造孔剂遗态结构的演变规律，探明其遗态结构保护.方法和弹性形变行为控制的理化条件；将多层次、多维植物遗态管孔结构引入轻质隔热耐火材.料中，建立高温复杂情况下轻质隔热材料孔结构的数理模型，研究孔结构参数与轻质隔热耐火.材料导热系数、强度和热震稳定性的相关性，阐明轻质隔热材料高强度/低导热与热震稳定性.的协同机理，通过控制孔隙结构、孔筋原位形成无机相的晶型与生长发育条件及植物遗态管孔.结构与材料界面结合层的厚度与物相组成，达到材料的增强、增韧、隔热的协同设计，为深化.废弃资源综合利用和轻质隔热材料制备技术的基础理论增加新的内容。