作者：Wenjing LIU1Ning LIAO1,2,3Yawei LI1,2,3

作者单位：1.The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology2.National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology3.Joint International Research Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology

刊名：China's Refractories

ISSN：1004-4493

出版年：2024-09-15

卷：33

期：3

起页：22-29

止页：

分类号：TQ175.732

语种：英文

关键词：

内容简介

The lamellar hydrates of CAC were designed with the introduction of nano CaCO3 or Mg-Al hydrotalcite （M-A-H）,and the effects on the green strength,pore structures,and high-temperature fracture behavior of alumina-spinel castables were investigated.The results show that nano CaCO3 or M-A-H stimulates rapidly the hydration of CAC and the formation of lamellar C4AcH11 or coexistence of C2AH8 and C4AcH11 at 25°C.The formation of lamellar hydrates can contribute to a more complicated pore structure,especially in the range of 400-2 000 nm.Meanwhile,the incorporation of well-distributed CaO or MgO sources from nano CaCO3 or M-A-H also regulates the distribution of CA6 and spinel （pre-formed and in-situ）.Consequently,the optimized microstructure and complicated pore structure can induce the deflection and bridging of cracks,thus facilitating the consumption of fracture energy and enhancing the resistance to thermal stress damage.