What is it about?
It is established that, at a shock-wave compression to 42 GPa, anatase particles can either transform into a columbite phase or exhibit amorphization. Shock-wave-induced phase transformations in nanostructural titanium dioxide TiO2 (anatase) powders of two types have been studied by Raman spectroscopy.
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Why is it important?
The interest in titanium dioxide (TiO2) is due to its wide use as a base of photocatalysts, chemical sensors, dielectric material for capacitors, and other numerous applications. It is commonly accepted that an increase in the number ratio of surface to bulk atoms that is achieved in nanodimensional particles imparts new properties to the material.
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Thus, the results of our experiments showed that the density of the initial pressed disk of anatase powder is of key importance for its subsequent phase transfor mations under shockwavecompression conditions. It is known that a decrease in the initial density of the shockwaveloaded sample leads to a significant increase in the temperature developed dur ing compression. It
Evgeny Kabachkov
Institute of the Problems of Chemical Physics Russian Academy of Sciences
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This page is a summary of: Phase transformations in nanostructural anatase TiO2 under shock compression conditions studied by Raman spectroscopy, Technical Physics Letters, September 2010, Pleiades Publishing Ltd,
DOI: 10.1134/s1063785010090191.
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