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

http://dx.doi.org/10.15407/fm22.03.322

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

Abstract: 

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.

Keywords: 
electrical conductivity, phosphates, solid solution, thermolysis.

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