Abstract
Zeolite of NH4-form Y-type was calcined under different atmospheres and temperatures. The dependence of its fluorescence properties on the calcination conditions was studied to reveal the mechanism of the fluorescence. Whether the atmosphere contained oxygen was significant to determine if oxygen vacancies could be responsible for the fluorescence. It also depended evidently on the temperature and atmosphere and was the strongest on 350 °C calcination in nitrogen atmosphere. The zeolite framework and decomposition of NH4+ might cause this dependence.
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