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首页> 外文期刊>Journal of Materials Research >Effect of temperature and vapor-phase encapsulation on particle growth and morphology
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Effect of temperature and vapor-phase encapsulation on particle growth and morphology

机译：温度和气相封装对颗粒生长和形貌的影响

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摘要

The effect of in situ vapor phase salt-encapsulation on particle size and morphology was systematically investigated in a sodium co-flow/furnace reactor. The temperature of the furnace was varied, and the primary particle size and degree of agglomeration of the resulting silicon and germanium particles were determined from transmission electron micrograph images of particles sampled in situ. Particle size increased with increasing temperature, a trend expected from our understanding of particle formation in a high-temperature process in the absence of an encapsulant. Germanium, which coalesces faster than silicon, formed larger particles than silicon at the same temperatures, also in agreement with observations of particle growth in more traditional aerosol processes. At the highest temperatures, unagglomerated particles were formed, while at low temperatures, agglomerated particles were formed, with agglomerate shape following the shape of the salt coating.
机译：在钠共流/炉反应器中系统地研究了原位气相盐包封对粒径和形态的影响。改变炉子的温度，并从现场取样的粒子的透射电子显微图像确定所得的硅和锗粒子的初级粒径和附聚度。粒度随着温度的升高而增加，这是根据我们对在没有密封剂的情况下高温过程中颗粒形成的理解所预期的趋势。锗的聚结速度比硅快，在相同温度下形成的颗粒比硅大，这也与更传统的气溶胶工艺中颗粒生长的观察结果一致。在最高温度下，形成未附聚的颗粒，而在低温下，形成附聚的颗粒，附聚的形状遵循盐涂层的形状。

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