KCl在NaY沸石中扩散的正电子谱学研究  

Dispersion of KCl into NaY zeolite studied by positrons annihilation spectroscopy

作　　者：朱俊[1] 张小强[1] 

机构地区：[1]武汉大学物理学院,武汉430072

出　　处：《华中师范大学学报（自然科学版）》2012年第6期681-685,共5页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金项目(10675093)

摘　　要：用正电子湮没寿命谱学的方法研究微量水对KCl在NaY沸石中扩散的影响,实验分别测量了有吸附水与脱水后担载量为10%的KCl/NaY寿命谱.所有寿命谱经4个寿命分量分解,其中第三、四寿命分量分别对应β笼与超笼微环境状态.实验表明在无水常温条件下KCl不能自发地在NaY沸石中扩散,微量水对KCl在NaY沸石中扩散有非常明显的影响.In this paper,we did some research on that how a little water affected the dispersion of KCl into NaY zeolite by positron annihilation spectroscopy.We measured the positron lifetimes of the KCl/NaY（10%） zeolite with as well as without adsorption water under the room temperature and in the vacuum.All lifetime spectra were resolved into four components,in which the third,the fourth components were related to o-Ps annihilation in the sodalite cage and in the super cage of the NaY.The results showed that without water,the KCl could not diffuse into the NaY spontaneously in room temperature;the water played an important part in the dispersion of the KCl into the NaY zeolite.

关 键 词：正电子湮没谱学 氯化钾 沸石 扩散 

分 类 号：TB383[一般工业技术—材料科学与工程]