The thermal stability ofthe crystal structure of modified USY zeolite is increased, and n-hexane cracking activity ina pulse micro-reactor is decreased, while the olefin selectivity is increased.
改性后超稳Y型分子筛的晶体结构热稳定性增加，脉冲微反试验的正已烷裂解活性下降而烯烃选择性得到提高。
Chromium oxide green with corundum crystal structure has such characteristics as high thermal stability, high painted capacity, chemical corrosion-resisting capacity, etc.
刚玉晶体结构型氧化铬有高的着色力、高热稳定性及耐化学腐蚀等特点。
But it is difficult to be synthesized, and its unstable structure results in rapid capacity fading and bad thermal stability.
但是该材料合成困难，由于结构不稳定会导致容量衰减、热稳定性差。
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