Effect of Sonication on Particle-Size Distribution in Natural Muscovite and Biotite
Effect of Sonication on Particle-Size Distribution in Natural Muscovite and Biotite
复制标题
超声处理对天然白云母和黑云母粒径分布的影响
DOI：
10.1346/cmn.203.0510613
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发表时间：
2003
影响因子：
2.2
通讯作者：
J. Pérez
中科院分区：
文献类型：
--
作者：
L. Pérez;F. Franco;M. A. Avilés;J. Poyato;J. Pérez
研究了超声波处理对天然白云母和黑云母样品的平均粒径、晶体结构、微晶尺寸和比表面积的影响。白云母和黑云母宏观片状的超声波作用产生了显著的粒度减小。介绍了用声化学方法制备粒度分布窄的微米、亚微米级白云母和黑云母颗粒的条件。超声作用对白云母比黑云母有更大的粒度细化作用。因此，对于较长的超声时间(100h)，白云母和黑云母中分别以亚微米和微米级颗粒为主。X-射线衍射分析表明，所得材料为晶态，仅观察到由于尺寸减小而导致的衍射线展宽。核磁共振研究表明，铝和硅的配位没有被处理改变。化学分析表明，样品的成分没有受到超声波的影响，除了超声波仪器的尖端杯有少量的钛污染。
The effects of ultrasound treatment on the mean particle size, crystal structure, crystallite dimensions and specific surface area of natural muscovite and biotite samples have been investigated. Sonication of macroscopic flakes of muscovite and biotite produced a drastic particle-size reduction. The conditions for the preparation of micron and submicron-sized muscovite and biotite particles of narrow particle-size distribution by sonochemistry are described. The effect of sonication on particle-size reduction is more significant for muscovite than for biotite. Thus, for long sonication times (100 h), submicron and micron particles are predominant in muscovite and biotite, respectively. The resulting materials are crystalline, as assayed by X-ray diffraction, only broadening of the diffraction lines due to size-reduction was observed. Nuclear magnetic resonance studies revealed that the coordination of Al and Si was not modified by the treatment. Chemical analysis showed that the composition of the sample was not affected by the sonication except for a small contamination by Ti from the tip cup of the sonication instrument.