Dielectric Relaxation Strength of a Low‐Alkali Glass

The low‐frequency dielectric loss maxima for glasses with low alkali concentrations are often obscured by a much larger dc conductivity contribution to the dielectric loss. Therefore, quantitative determination of the dielectric relaxation strengths for these glasses is difficult. An approximate relation between the impedance, electric modulus, and dielectric constant relaxation maxima is developed for glasses exhibiting small dielectric relaxation strengths. Using the obtained relations, the dielectric relaxation strength, Δe, for a GeO 2 glass containing 47 wt ppm Na 2 O is estimated to be ≅0.3.