Characterization of vaterite synthesized at various temperatures and stirring velocities without use of additives

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F15%3A00446212" target="_blank" >RIV/68378297:_____/15:00446212 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0032591015005239" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0032591015005239</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.powtec.2015.06.064" target="_blank" >10.1016/j.powtec.2015.06.064</a>

Result language
angličtina
Original language name
Characterization of vaterite synthesized at various temperatures and stirring velocities without use of additives
Original language description
Conditions for the synthesis of vaterite without additives have been investigated (T = 30 ? 90 °C, stirring velocity=200?600 rpm). The obtained different CaCO3 polymorphs were characterized with Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM). Quantitative phase analysis (QPA) was performed by the Rietveld method. To describe vaterite diffraction patterns, two structural models were employed. Their relative abundance was found to change with the temperature of synthesis. The optimal synthesis conditions for preparing pure vaterite (99 wt.%) were found at 60 °C and 600 rpm. This is the first time pure vaterite is obtained at such high temperature without additives. The conditions under which the different polymorphs formed, and their microstructural features, are discussed. In addition, nanoindentation measurements on synthesized vaterite and calcite are firstly reported. The vaterite elastic modulus is higher than t
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
AL - Art, architecture, cultural heritage
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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