Funct. Mater. 2015; 22 (3): 322-326.

Electrical conductivity of solid solution of Co(II)-Zn dihydrophosphate and its thermolysis products

N.M.Antraptseva, N.V.Solod, V.A.Povshuk

National University of Life and Environmental Sciences of Ukraine, 17 Heroev Oborony St., 03041 Kyiv, Ukraine


Dependence of the specific electrical conductivity value of the solid solution with composition Co1-xZnx(H2PO4)2·2H2O (0 < x < 1.0) and products of its partial or complete dehydration from temperature and duration of heat treatment has been investigated. It has been established that they have considerable proton conductivity (from 1.01·10-2 - 1.18·10-2 Ohm-1cm-1 to 7.51·10-3 - 9.57·10-3 Ohm-1cm-1) in a wide temperature range (80-270°C). The main contribution to their proton conductivity has made mobile protons of the phosphate anion P-OH groups and free phosphoric acid protons, which have produced in the intermediate thermolysis products according to PMR and 31P NMR spectrum analysis of Co(II)-Zn dihydrophosphates heat treatment products. Contribution of crystal water protons is minimal.

electrical conductivity, phosphates, solid solution, thermolysis.

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