Conclusions
An investigation was carried out into the effect of various factors on the electrophysical properties of coatings formulated from a polymer binder and very finely divided silver and graphite. It has been established that for silver-base systems the greatest increase in conductivity is achieved by the application of ultrasonic vibration during the preparation of the silver powder and its subsequent polishing, and for graphite-base systems, by comminution of the graphite. The electrical conductivity of finished coatings is increased by calendering, which leads to the formation of additional contact points as a result of denser packing and the breaking up of surface particle agglomerates. The properties of such paste coatings are strongly affected by the rheological characteristics of the pastes. Optimum relative amounts of the paste components (polymer, diluent, and filler) have been established, and the rheological characteristics determined. Compositions of current-conducting pastes of low annealing temperature have been developed which can be applied to base materials of low heat resistance.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
A. Ya. Il'in and V. A. Vanshtein, “Information readout device,” Avtomat. Telemekh. Svyas', No. 1, 10–12 (1976).
N. K. Babenko, G. I. Krivich, L. G. Tkach, and G. A. Mikhailov, “Programming memory device,” in: Computer Memory Devices [in Russian], Znanie, Kiev (1977).
N. K. Babenko, Z. V. Litvishko, A. Ya. Il'in, and M. Kh. Shtekel'berg, “Investigation of graphite coatings for data transmission devices,” in: Computer Memory Devices [in Russian], Znanie, Kiev (1978).
V. V. Bushin, Z. V. Litvishko, V. A. Pistol'kors, and L. G. Tkach, “Method of manufacture of numerical conductors for a semipermanent memory device,” in: Computer Memory Devices [in Russian], Znanie, Kiev (1974).
M. H. Policy and B. B. Boonstra, “Carbon blacks for highly conductive rubber,” Rubber Chem. Technol.,30, No. 1, 57–60 (1957).
V. V. Bushin, Z. V. Litvishko, L. G. Tkach, and V. A. Pistol'kors, “Method of manufacture of information cards for a semipermanent memory device,” Upr. Sistemy Mashiny, No. 4, 57–58 (1974).
N. K. Babenko and Z. V. Litvishko, “Method of manufacture of current-conducting coatings, mainly for information blanks,” Inventor's Certificate No. 696641, Byull. Izobret., No. 41 (1979).
A. V. Fraioli, “Yield values in thick-film rheology,” Solid-State Technol.,17, No. 5 (1974).
Author information
Authors and Affiliations
Additional information
Translated from Poroshkovaya Metallurgiya, No. 12(228), pp. 60–65, December, 1981.
Rights and permissions
About this article
Cite this article
Litvishko, Z.V., Khimchenko, Y.I., Babenko, N.K. et al. Composite materials based on polymer binders and very fine silver and graphite powders. Powder Metall Met Ceram 20, 877–882 (1981). https://doi.org/10.1007/BF00789203
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00789203