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Journal of Ceramic Science and Technology

The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of  the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.

The Journal is published by Göller Verlag GmbH on behalf of the Deutsche Keramische Gesellschaft (DKG). Edited by Yu-Ping Zeng, Shanghai Institute of Ceramics, Chinese Academy of Sciences, China.

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Influence of Phase Separation on Thermal Conductivity of Ti1-xSnxO2 Ceramics

K. Rubenis, J. Locs, J. Mironova, R. Merijs-Meri

Riga Technical University, Faculty of Material Science and Applied Chemistry, Institute of General Chemical Engineering, Paula Valdena St. 3, LV-1048, Riga, Latvia

received September 15, 2015, received in revised form October 29, 2015, accepted November 3, 2015

Vol. 7, No. 1, Pages 135-138   DOI: 10.4416/JCST2015-00061

Abstract

Many technologically important ceramic materials are made of more than one component. If components are isostructural they can form a stable or a metastable solid solution that can undergo phase separation below a critical temperature, which can significantly affect different properties of the material. In this work, we investigated the effect of phase separation on thermal conductivity at room temperature of Ti1-xSnxO2 ceramic with different Ti/Sn ratios. The samples were sintered at 1500 °C and afterwards annealed at 1100 °C for 48 h in order to induce phase separation. It was observed that substitution of Ti with Sn and vice versa considerably reduces the thermal conductivity of the parent phases (TiO2 and SnO2). The thermal conductivity of the samples with compositions inside the spinodal region after annealing increased compared with that of samples that had not been annealed while for the compositions outside the spinodal region, only a limited effect was observed.

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Keywords

Titanium dioxide, TiO2, tin dioxide, SnO2, TiO2-SnO2, phase separation, ceramic, thermal conductivity

References

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