【摘 要】
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用正电子湮没谱学研究NaCl与NaY沸石机械混合后 ,NaCl在NaY中的固溶扩散过程 .分别测量不同质量比的NaCl NaY[(1— 2 0 ) % ]经 5 0 0℃烘烤 1h ,NaCl NaY(15 % )经不同温度
【机 构】
:
武汉大学物理系,武汉大学物理系,武汉大学物理系,武汉大学物理系 武汉430072,武汉430072,武汉430072,武汉430072
论文部分内容阅读
用正电子湮没谱学研究NaCl与NaY沸石机械混合后 ,NaCl在NaY中的固溶扩散过程 .分别测量不同质量比的NaCl NaY[(1— 2 0 ) % ]经 5 0 0℃烘烤 1h ,NaCl NaY(15 % )经不同温度烘烤 1h ,以及NaCl NaY(15 % )经 5 0 0℃烘烤不同时间后的正电子寿命谱 .所有寿命谱都出现了 5个寿命分量 ,其中第 3,4 ,5寿命分别与 β笼、超笼及沸石微粒界面空洞的大小和数量相关 .实验表明正电子湮没谱学能敏感地表征NaCl在NaY中的固溶扩散过程 .
Positron annihilation spectroscopy was used to study the solution diffusion process of NaCl in NaY after mechanically mixing NaCl and NaY zeolites.The NaCl NaY [(1 - 20)%] with different mass ratios were respectively baked at 500 ℃ for 1h , The positron lifetimes of NaCl NaY (15%) baked at different temperatures for 1h, and NaCl NaY (15%) baked at 500 ℃ for different periods of time all appeared in 5 life components, of which, The lifetimes of 3,4, 5 are related to the size and number of interfacial cavities in β-cage, supercage and zeolite, respectively. The experimental results show that positron annihilation spectroscopy can sensitively characterize the solution-diffusion process of NaCl in NaY.
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