Geopolymers
Inorganic polymeric new materials
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Cornelia Marinescu
Cornelia Marinescu
Institute of Physical Chemistry Ilie Murgulescu of the Romanian Academy, 060021, Bucharest, Romania
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Ancuta Sofronia
Ancuta Sofronia
Institute of Physical Chemistry Ilie Murgulescu of the Romanian Academy, 060021, Bucharest, Romania
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Cristina Rusti
Cristina Rusti
National Institute of Research and Development for Non-Ferrous and Rare Metals, 077145, Bucharest, Romania
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Roxana Piticescu
Roxana Piticescu
National Institute of Research and Development for Non-Ferrous and Rare Metals, 077145, Bucharest, Romania
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Viorel Badilita
Viorel Badilita
National Institute of Research and Development for Non-Ferrous and Rare Metals, 077145, Bucharest, Romania
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Eugeniu Vasile
Eugeniu Vasile
METAV—Research and Development, 020011, Bucharest, Romania
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Radu Baies
Radu Baies
National Research Institute for Electrochemistry and Condensed Matter, 300224, Timisoara, Romania
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Speranta Tanasescu
Speranta Tanasescu
Institute of Physical Chemistry Ilie Murgulescu of the Romanian Academy, 060021, Bucharest, Romania
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Abstract
The aim of the article is to investigate the influence of particle size on titanium dioxide phase transformations. Nanocrystalline titanium dioxide powder was obtained through a hydrothermal procedure in an aqueous media at high pressure (in the range 25–100 atm) and low temperature (≤200 °C). The as-prepared samples were characterized with respect to their composition by ICP (inductive coupled plasma), structure and morphology by XRD (X-ray diffraction), and TEM (transmission electron microscopy), thermal behavior by TG (thermogravimetry) coupled with DSC (differential scanning calorimetry). Thermal behavior of nanostructured TiO2 was compared with three commercial TiO2 samples. The sequence of brookite–anatase–rutile phase transformation in TiO2 samples was investigated. The heat capacity of anatase and rutile in a large temperature range are reported.
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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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Temperature dependence of the rate of reaction in thermal analysis
The Arrhenius equation in condensed phase kinetics
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