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Sol-gel synthesis and crystal chemical properties of the pigment Zn1.9Cu0.1SiO4

R. F. Samigullina, M. V. Rotermel, I. V. Ivanova, T. I. Krasnenko

Abstract


The pigment Zn1.9Cu0.1SiO4 was obtained by the method of sol-gel synthesis. The crystallization temperature was set at 776 °C, ∆H ≈ -16.3 kJ/mol. Thermal expansion of the individual Zn2SiO4 and Zn1.9Cu0.1SiO4 solid solutions was studied by in situ high-temperature X-ray diffraction. It is shown that the substitution of Zn2+ → Cu2+ does not lead to significant changes in the lattice parameters; in the range from room temperature to 800 °C the structure expands monotonically when heated. The coefficients of volumetric thermal expansion for Zn2SiO4 and Zn1.9Cu0.1SiO4 are αV = 8.05 · 10-6 and 8.81 · 10-6 1/K, respectively. The colorimetric coordinates in the RGB system are 71.8% red, 72.9% green and 79.6% blue, which corresponds to the gray-blue pigment.

Keywords


pigment; willemite; sol-gel synthesis; thermal expansion

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References


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DOI: http://dx.doi.org/10.15826/chimtech.2018.5.4.05

Copyright (c) 2018 R.F. Samigullina, M.V. Rotermel, I.V. Ivanova, T.I. Krasnenko

© Chimica Techno Acta, 2014-2018
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

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