Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 60: Issue 2
Anomalies in Heat Capacity Measurements of RuO2-TiO2 System
Authors:
T. Mitsuhashi National Institute for Research in Inorganic Materials 1-1 Namiki Tsukuba 305-0044 Japan 1-1 Namiki Tsukuba 305-0044 Japan

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A. Watanabe National Institute for Research in Inorganic Materials 1-1 Namiki Tsukuba 305-0044 Japan 1-1 Namiki Tsukuba 305-0044 Japan

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Pages:
683–689
Online Publication Date:
16 Aug 2006
Publication Date:
01 May 2000
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010177306503
Keywords:
DSC; heat capacity; mixed oxide TiO2-RuO2; RuO2; TiO2
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Abstract  

DSC was used for heat capacity measurements of pure RuO2 in the temperature range from 300 to 1170 K of solid solutions corresponding to the compositions of (Ti1−x Rux )O2 (x ≤0.15 and x ≥0.85) and in the temperature range from 300 to 1550 K of pure TiO2. The analysis of experimental data obtained within 2% of accuracy has shown that the characteristic temperatures representing the harmonic lattice vibrations do not strongly depend on the chemical composition x . It was demonstrated that non-harmonic heat capacity is strongly correlated to x. The existence of additional excess heat capacity was observed with the mixed oxide solid solution samples of low Ru content and explained by the defect formation model.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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