泡沫凝胶法制取陶瓷的气孔率影响因素研究

Study on Porosity of Stiring-Formed by Gelcasting Foams

摘要:

主要研究了泡沫凝胶法中的各工艺因素如搅拌速度、浆体粘度和浆体密度对气孔率的影响,并结合起泡形成理论,进一步引入雷诺数（Re）来衡量气孔率的变化.研究发现无论是改变搅拌速度、浆体粘度还是浆体密度,只要Re相同,则气孔率相同,并且在气孔率和雷诺数之间还存在着定量的函数关系.

关键词:多孔陶瓷 泡沫凝胶法 搅拌 雷诺数 气孔率

Abstract:

The effects of stir velocity, slurry viscosity and density on the porosity were studied and the porosity was characterized by using the Reynolds number according to the bubble forming theory in this paper. It is found that the porosity is the same if the Reynolds number is the same regardless different stir velocity, slurry viscosity or slurry density. The quantitative functional relationships between the porosity and Reynolds number was deduced.

Key words:porous ceramic; gel casting foam; stirring; Reynolds number; porosity