Piston–cylinder apparatus for high-pressure impedance spectroscopy

R. Hinrichs, J. A. H. da Jornada
1997 Review of Scientific Instruments  
A simple piston-cylinder apparatus was developed for impedance spectroscopy at pressures up to 3 GPa and temperatures up to 500°C. The apparatus is of the compound cylinder type, with the innermost cylinder made of a commercially available low-cost alumina-based ceramic, with pistons of hard metal that allow electric connections. Cell electrical resistance was higher than 1 M⍀ at TϽ300°C and higher than 100 k⍀ at 400°C. The inductivity in the wires and pistons was about 2 H. The sample was
more » ... sed in a h-BN capsule, which insured a good hydrostaticity without disturbing the measurement. The equipment proved to be very useful in determining the activation volume of the conduction process in several ionic conductors.
doi:10.1063/1.1147808 fatcat:qedvszcifbbj7k7nppps44b3cm