摘要
采用泡沫法结合凝胶注模工艺制备莫来石多孔轻质材料,通过在Al_2O_3-SiO_2系泡沫料浆中分别引入三醋酸甘油酯、聚酰亚胺、羟丙基纤维素作为胶凝剂,研究胶凝剂的种类对泡沫料浆流变性能的影响及其与固化时间的关系规律。结果表明:3种胶凝剂对泡沫料浆的流变性能影响程度不同。流变性能直接影响泡沫料浆的固化时间,提高泡沫料浆的触变性、黏度增长速率以及扩大线性黏弹性区间是缩短泡沫料浆固化时间的有效途径。3种胶凝剂中,三醋酸甘油酯固化效果最佳,以其作为胶凝剂的泡沫料浆初凝时间和固化时间均最短。
The direct foaming method combined with gelcasting was employed to prepare mullite ce-ramic foam.Triacetin,polyimide and hydroxypropyl cellulose were creatively proposed as gelling agent for gelcasting process,respectively.The influence of gelling agent on rheological properties and the correlation rule with the curing time were studied.The results show that different kinds of gelling agent have different influence on rheological properties.It is considered that the rheological properties have significant influence on the curing time.Ameliorating the thixotropy,improving the rate of vis-cosity growth,and enlarging the linear viscoelastic domain of foam slurry are conducive to shorten the curing time of foam slurry.Among these three gelling agents,the triacetin obtains the optimal effects,the initial curing time and curing time of foam slurry is both shortest.
作者
王鑫
赵雷
杜星
方伟
何漩
叶林峰
WANG Xin;ZHAO Lei;DU Xing;FANG Wei;HE Xuan;YE Lin-feng(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology, Wuhan 430081, China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2017年第12期106-111,共6页
Journal of Materials Engineering
基金
国家重点基础研究发展计划前期研究项目(2012CB22702)
关键词
泡沫料浆
胶凝剂T流变性
固化时间
foam slurry
gelling agent
rheological property
curing time
