Research on preparation and properties of high strength light foamed ceramics
Intends to obtain lightweight foamed ceramics with high strength by adding brown corundum powder.Meanwhile,through analyzing chemical composition,phase constitution,pore characteristics and microstructure,the decisive factors affecting me-chanical properties can be mastered,and the optimal formula and sintering system can be found.The results show that appropriate addition of brown corundum powder promotes the formation of indialite,so as to achieve high strength while retaining good tough-ness.In addition,fine and uniform pore structure with defectless pore walls is also the key to reduce brittleness.Finally,by adding an appropriate amount of brown corundum powder and controlling the content of alkali metal as well as alkaline earth metal,the foamed ceramic meeting industry standard is produced at sintering temperature of 1180 ℃ and with sintering period of 14 h.The optimized ceramic sample has bulk density of 504 kg/m3,water absorption of 1.52％,elastic modulus of 0.90 GPa and compressive strength as high as 9.50 MPa.
万方数据
维普
