摘要
研究了不同掺量纳米MgO和石墨复合铝酸盐水泥基储热材料的热性能(体积热容、热导率及热膨胀系数)和力学性能(抗压强度)。采用X射线衍射仪(XRD)、热流仪及压汞仪(MIP)分别表征水泥基储热材料的物相变化、水化反应速率及内部孔分布状况。结果表明:在石墨掺量保持10%不变的情形下,掺入1%纳米MgO时,铝酸盐水泥基复合材料经过350℃热处理后的体积热容和热导率与纯铝酸盐水泥试样相比分别提高了75.8%和59.3%。
The influence of different contents of nano-MgO and graphite on thermal properties （volume heat capacity, thermal conductivity and thermal expansion coefficient ） and mechanical property （the compressive strength ） of aluminate cementitious composite materials for thermal energy storage were investigated. Then X-ray diffraction （XRD）, heat flow meter and mercury intrusion porosimetry （MIP） were used to characterize the phase change, the hydration rates and the pore distribution of composite pastes. The results indicate that when the nano-MgO amount is 1% and the graphite amount is 10%, the volume heat capacity and thermal conductivity of aluminate cementitious composite materials after heattreated at 350℃ is 75.8% and 59.3% higher than that of pure paste, respectively.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第11期3709-3714,共6页
Bulletin of the Chinese Ceramic Society
基金
材料化学工程国家重点实验室自主课题(ZK201211)
江苏高校优势学科建设工程项目(PAPD)
江苏省普通高校研究生科研创新计划项目(CXZZ13_0425)
关键词
纳米MgO
石墨
铝酸盐水泥
储热材料
热性能
nano-MgO
graphite
aluminate cement
thermal storage material
thermal property
