Abstract
The processes of a ultrafine Ag/ZnO mixture produced by coprecipitation from salt solutions were investigated. The coprecipitation in AgNO3-ZnNO3-Na2CO3 system was analyzed in the presence of surfactants, considering the pH value and a solution composition contribution. The optimal coprecipitation conditions were Na2CO3 precipitating agent excess of ∼20%, providing a pH value of ∼10, with subsequent thermal decomposition of the mixture at about 700 K. A thermal analysis of the precursor mixtures were carried out. The phase composition, dispersity and morphology of the precipitates were determined before and after a thermal treatment. The size decrease of the precipitated particles, as well as dispersity and distribution uniformity increase of the oxide inclusions in the target composite matrix is due to the presence of surfactants in solutions.
Similar content being viewed by others
References
Braunovic, M., Konchits, V.V., and Myshkin, N.K., Electrical Contacts. Fundamentals, Applications and Technology, London: CRC Press, 2006.
Schoepf, T.J., Behrens, V., and Honig, T., IEEE Trans. Components Packaging Technologies, 2002, vol. 25, pp. 656–661.
Nikolaeva, N.S., Ivanov, V.V., and Shubin, A.A., Perspektiv. Materialy, 2012, no. 2, pp. 71–76.
Poroshkovaya metallurgiya. Spechennye i kompozitsionnye materialy (Powder Metallurgy: Sintered and Composite Materials), Shatt, V., Ed., Moscow: Metallurgiya, 1983.
Joshi, P.B., Krishnan, P.S., Patel, R.H., et al., Int. J. Powder Metallurgy, 1998, vol. 34, no. 4, pp. 63–74.
US Patent 6,432,157 (publ. 2002).
Masterov, V.A. and Saksonov, Yu.V., Serebro, splavy i bimetally na ego osnove (Silver, Alloys and Bimetals on Its Basis), Moscow: Metallurgiya, 1979.
US Patent 4 023 961, 1977.
Joshi, P.B., J. Materials Sci. Lett., 1995, vol. 14, pp. 1099–1101.
Lidin, R.A., Molochko, V.A., and Andreeva, L.L., Khimicheskie svoistva neorganicheskikh veshchestv (Chemical Properties of Inorganic Substances), Moscow: Khimiya, 2000.
Spravochnik khimika. T. 2. Osnovnye svoistva neorganicheskikh i organicheskikh soedinenii (Chemst’s Handbook, vol. 2, Basic Properties of Inorganic and Organic Compounds), Nikol’skii, B.P., Ed., Leningrad: Khimiya, 1971.
Zelikman, A.N., Vol’dman, G.M., and Belyaevskaya, L.V., Teoriya gidrometallurgicheskikh protsessov (Theory of Hydrometallurgical Properties), Moscow: Metallurgiya, 1975.
Sawada, Y., Watanabe, N., and Henmi, H., Thermochim. Acta, 1989, vol. 138, pp. 257–265.
Hales, M.C. and Frost, R.L., J. Therm. Anal. Calorim., 2008, vol. 91, pp. 855–860.
Nobuyoshi, K., Shuto, Y., and Tomoyasu, K., J. Phys. Chem. C, 2012, vol. 117, pp. 326–336.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © N.S. Nikolaeva, V.V. Ivanov, A.A. Shubin, 2014, published in Zhurnal Prikladnoi Khimii, 2014, Vol. 87, No. 4, pp. 409–415.
Rights and permissions
About this article
Cite this article
Nikolaeva, N.S., Ivanov, V.V. & Shubin, A.A. Synthesis of Ag/ZnO mixture for powdered contact materials. Russ J Appl Chem 87, 405–411 (2014). https://doi.org/10.1134/S1070427214040016
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1070427214040016