摘要
In order to improve the service performance of Al_(2)O_(3)-SiC-C castables,a novel Si-N-O composite micropowder was synthesized by the chemical combustion method.Using brown corundum,sintered alumina,silicon carbide,activeα-Al_(2)O_(3)micropowder,SiO_(2)micropowder,calcium aluminate cement,Si powder and spherical asphalt as the raw materials,adding additive of Si-N-O composite micropowder,Al_(2)O_(3)-SiC-Si_(3)N_(4)/Si_(2)N_(2)O-C castables were prepared.The effects of the Si-N-O composite micropowder addition on the mechanical properties and oxidation resistance of the castables were investigated,and the intrinsic mechanism of strengthening and antioxidation caused by this novel additive was discussed.Experimental results show the introduction of Si-N-O composite micropowder leads to significant improvement in the cold strength,oxidation resistance,thermal shock resistance and hot modulus of rupture of the Al_(2)O_(3)-SiC-C castables.When the Si-N-O composite micropowder addition is approximately 3 mass%,the castable possesses the best comprehensive performance.
作者简介
Corresponding:LI Youqi,senior engineer,was awarded the titles of“Double Creation Talents”in Jiangsu Province,“Green Yang Golden Phoenix Leading Talents”in Yangzhou City,and“Science and Technology Leading Talents”in Luoyang City,won one second prize for scientific and technological progress in Henan Province,and one first and one second prize for technological innovation in the building materials industry in Henan Province.He hosted and participated in over 10 national,provincial,and municipal scientific research projects,and contributed to the revision of 9 standards,including one international standard and 8 national and industry standards.He has published nearly 40 academic papers and granted over 100 patents.e-mail:13348121669@163.com。
