粉末X射线衍射法测定SAPO-11分子筛相对结晶度

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关键词:: SAPO-11分子筛；粉末X射线衍射法；相对结晶度
zeolite SAPO-11; powder X-ray diffractometry; relative crystallinity

摘要:: 采用粉末X射线衍射法测定了SAPO-11分子筛相对结晶度，考察了衍射过程中不同仪

器工作条件对 SAPO-11分子筛衍射峰的影响，优选 SAPO-11分子筛最佳测定工作参数。在

7%~95% 结晶度范围内，精密度实验重复性为 2%，再现性为 4%。结果表明，该方法准确、可

靠、重复性好，填补了SAPO-11分子筛相对结晶度测定方法标准的空白。

The relative crystallinity of zeolite SAPO-11 are determinated by powder X-ray diffraction.The effects of divergence slit,

scatter-proof slits, receiving slit, voltage, current, scanning speed and step length on diffraction peak of zeolite SAPO-11 were

investigated respectively, the best determination parameter of zeolite SAPO-11 is selected. In the range of 7% ~ 95% crystallinity,

the repeatability of the precision test was 2% and the reproducibility was 4%. The results showed that the method was accurate,

reliable and reproducible, and filled the blank of method for determination of the relative crystallinity of zeolite SAPO-11.