摘要
本文报导了某些因素对高铝水泥基MDF材料介电常数和介电损耗的影响。实验结果表明:MDF材料的介电常数和介电损耗均与交流电频率有关;当聚合物掺量增加时,介电常数及介电损耗均减小;采用热压成型的MDF材料比雾室养护的MDF材料具有较低的介电常数及介电损耗;用硅灰改性可使介电常数和介电损耗进一步降低。
The effects of some factors on dielectric properties of high alumina MDF cement pastes is reported in this paper. It is shown that the dielectric permittivity (ε) and the loss factor ( tanδ) are all frequency dependant. ε and tanδ decrease as polymer loading increases. Lower ε and tanδ are measured for hot-pressed high alumina MDF cement paste in comparison with those for fog curing high alumina MDF cement paste, ε and tanδ might be further lowered by the addition of silica fume.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1993年第4期477-483,共7页
Journal of Tongji University:Natural Science
基金
高等学校博士点专项科研基金
国家自然科学基金
关键词
矾土水泥
MDF材料
介电性能
MDF cement paste
Dielectric properties
Hot pressing
Sillca fume
