Effect of oxides of rare earth elements on the electrophysical properties of paste based on lead and bismuth rutenates

Conclusions The alloying additions of the oxides of rare-earth elements make it possible to control the electrical parameters ( _s, TCR, R_c, R_c) of thick-film resistors based on Bi₂Ru₂O₇ and Rb₂Ru₂O₆.The optimum combination of properties is obtained in alloying with La₂O₃: specific surface resistance of 10²–10⁵ /, TCR resistance ±150-10^–6 K^–1, transition contact resistance less than 1.5% of the nominal resistance.The effect of alloying on the properties of thick-film resistors is based on the mechanism by which the oxides dissolve in the glass phase and play the role of modifying additions occupying vacancies in the network structure of glass and stretching this structure. Consequently, the width of the dielectric phase increases, the specific resistance of the films increases, and the minimum temperature dependence of the resistance is displaced to high temperatures.Translated from Poroshkovaya Metallurgiya, No. 5(341), pp. 52–56, May, 1991.