To efficiently operate microwave assisted nanoparticle synthesis, thermal behavior around aggregate during irradiation must be well-understood to ensure stable operation. The key information in this regard are aggregate size and shape. In this study, aggregate size before the irradiation and maximum bubble size during the irradiation were measured at the different induction time and varying number density of primary particle. It was found that maximum bubble size is more closely related to the number density of aggregate than the number density of primary particles. Further analysis on the results indicates that aggregate size and shape can be estimated using known data of bubble size. These findings provide useful information on how microwave assisted nanoparticle formation can be better operated.

为了有效地进行微波辅助的纳米粒子合成，必须充分理解辐照过程中聚集体周围的热行为，以确保稳定的操作。在这方面的关键信息是骨料的大小和形状。在这项研究中，在不同的诱导时间和变化的一次粒子数量密度下，测量了辐照前的聚集体尺寸和辐照期间的最大气泡尺寸。发现最大气泡尺寸与聚集体的数量密度比一次颗粒的数量密度更紧密相关。对结果的进一步分析表明，可以使用已知的气泡大小数据来估计聚集体的大小和形状。这些发现提供了有关如何更好地操作微波辅助纳米颗粒形成的有用信息。