Microwave absorption properties of steelmaking dusts: effects of temperature on the dielectric constant (<i>ε</i>′) and loss factor (<i>ε</i>′′) at 1064 MHz and 2423 MHz

Abstract

gases. Furthermore, the increase in the electrical conductivity of the samples at high temperature resulted in increased dielectric values. The behavior of the loss tangent of the samples with increasing temperature coincided with the behavior of the loss factor. The penetration depth decreased with an increase in temperature at both frequencies, while an increase in the dielectric properties caused a significant decrease in the penetration depth. The results indicated that steelmaking dusts have good microwave absorbing properties owing to their carbon and iron oxide contents.