Characterizing the loss factor of basic rock-forming minerals is fundamental in understanding the mineral-microwave interactions and predicting the possible weakening effect of microwave on rock. This paper proposed a novel method for deriving the loss factor of minerals based on the microwave heating rate tests, the electromagnetic numerical simulations and the effective medium theory. The heating characteristics of 8 basic rock-forming minerals at 500 W were investigated using a 2.45 GHz single-mode microwave and the minerals were classified into 3 categories based on the heating rate in °C/min/g. Meanwhile, the electric field strengths in the minerals were obtained using electromagnetic simulations and the loss factors of the minerals were calculated based on the effective medium theory. The loss factors calculated were then compared with those measured by the resonant cavity perturbation technique. This method provides an alternative to get the loss factor of minerals from the microwave heating rate tests.

表征基本成岩矿物的损耗因子，对于理解矿物与微波的相互作用以及预测微波对岩石的可能减弱作用至关重要。本文基于微波加热速率测试，电磁数值模拟和有效介质理论，提出了一种推导矿物损失因子的新方法。使用2.45 GHz单模微波研究了500 W下的8种基本成岩矿物的加热特性，并根据升温速率（°C / min / g）将矿物分为3类。同时，利用电磁模拟获得了矿物的电场强度，并基于有效介质理论计算了矿物的损耗因子。然后将计算出的损耗因子与通过谐振腔扰动技术测得的损耗因子进行比较。此方法提供了一种从微波加热速率测试中获取矿物损失因子的替代方法。