Dielectric Properties and Temperature Increase of Zinc Oxide Dust Derived from Volatilization in Rotary Kilns.

The present study measures dielectric properties (ε', ε" and tanδ) of zinc oxide dust produced in a rotary kiln, using a cavity perturbation method with microwaves at 2.45 GHz. The effect of apparent density of the dust on the dielectric properties was determined. The results indicated that zinc oxide dust has excellent absorbing performance and can reach 800 ºC in 6 minutes. The apparent density of zinc oxide dust and the microwave penetration depth were also related. [ABSTRACT FROM AUTHOR]