关键词: 火箭发射台;焦宝石;涂抹料

Abstract: Calcined flint clay based smear refractory was prepared with calcined flint clay, cordierite, silica fume and calcium aluminate cement as starting materials.The results show that the calcined flint clay based smear refractory has good physical properties, good ablation resistance and good heat insulation.The calcined flint clay based smear refractory is suitable for coastal rocket-launching grounds where has special natural environment, such as hot, humid, salty and ultraviolet radiation.The results of using the developed calcined flint clay based smear refractory on a rocket launching pad showed that the calcined flint clay based smear refractory can bear the combustion-gas stream when a rocket launched, the lost area of the calcined flint clay based smear refractory is less than 5%.The developed calcined flint clay based smear refractory is suitable for rocket launching pad, and played an important role in the protection of rocket launching pad.

Key words: rocket launching pad;calcined flint clay;smear refractory