PAT测孔技术研究及其在MDF水泥中的应用

STUDY ON THE DETECTING PORE TECHNIQUE OF PAT AND ITS APPLICATION TO MDF CEMENT

探讨了正电子湮没（ＰＡＴ）测孔技术及其在水泥材料中的应用，并与水银压入法测孔技术进行了对比实验。认为ＰＡＴ能对水泥材料中孔结构及其发展过程的变化规律进行描述，适用于其它测孔法无法解决的微孔结构的分析，可与这些方法起到相互补充的作用。利用ＰＡＴ对ＭＤＦ水泥材料的研究表明，它可揭示这种材料中相间界面作用增加的效应，并能对聚合物在材料制备过程中的物理及物理化学作用进行解释。

The positron annihilation technique(PAT)for detecting pores and its application to cementmaterials when compared with the mercury intrusion method was studied.It is considered that PAT can be usedto study the,tructure of the pores and to describe the development of the pore structuire in cement materials,Itis applicable in the analysis of the micro～pore structure in depth while other methods are not suitable and it is alsosupplementary for these methods.The research results show that PAT can reveal the increasing effect of theinterface in MDF cement and interpret the pbysical or physico-chemical effect of polymer during the preparationof materials.