Ib. Kozma et al., COMBINED SYSTEM FOR MEASUREMENT OF ELECTRIC-CONDUCTIVITY OF YBACUO SUPERCONDUCTORS UNDER VARIOUS CONDITIONS, Hungarian journal of industrial chemistry, 25(3), 1997, pp. 219-221
The contact resistance of polycrystalline Y-Ba-Cu-O systems may be imp
ortant for technical applications and, for example, the catalytic beha
viour of this oxide system. In order to study the behaviour of Y-Ba-Cu
-O systems both in their normal state and during catalysis, a complex
measuring system was constructed. Variations in the electric conductiv
ity of samples were measured both in vacuum and in various gaseous atm
ospheres in the temperature range 77-700 K.