粒度分散性(Alpine Sieve method):max 40%: < 250 µ；m 60-95%: 250 - 1000 µ；m min 95%: < 1000 µ；m
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产生上述的差异主要与煅烧对催化剂颗粒度、分散性及酸碱性的改变有关。
That the calcination process will change the graininess, dispersity and acidity-basicity of the catalyst can explain the discrepancy of the above phenomena.
以AOT改性氧化镁可使氧化镁表面与AOT发生化学键合，从而可得到分散性好、更加稳定，粒度更均匀的纳米氧化镁颗粒。
Modifying the magnesia with AOT, can make the surface of magnesia connect with AOT by chemical bond, obtaining more stably and equally nanomagnesia particles.
通过沉降时间观察其分散性，采用激光粒度仪、扫描电镜、 原子力显微镜对分散效果进行进一步分析。
Then the dispersity was evaluated with settlement time. And laser particle size analyzer, SEM and AFM were employed to confirm the results.
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