A Time Domain Reflectometer for Dielectric
Relaxation Spectroscopy of Electrolyte Solutions
R. Buchner and J. Barthel
Ber. Bunsenges. Phys. Chem. 101 (1997) 1509-1516.
Abstract
A time domain reflectometer for dielectric relaxation spectroscopy of
electrolyte solutions in the temperature range of -45 <=
theta/°C <= 90 is presented. With a set of cutoff cells
differing in their cell constants, pure solvents covering the
permittivity range of 7 <= eps <= 228 and their concentrated
electrolyte solutions (kappa > 1 Omega-1m-1)
can be investigated at frequencies of 0.05 < nu/GHz < 9. In
combination with the transmission line system of our laboratory (8.5
< nu/GHz < 89) dielectric dispersion, eps'(nu), and total loss,
eta''(nu)=eps''(nu) + kappa /(2 pi nu eps_0)$ can be determined with 2
% accuracy relative to eps.
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(c) 1998 Herbert Poepke
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