Variable temperature in situ X-ray diffraction study of mechanically activated synthesis of calcium titanate, CaTiO{sub 3}
The effect of mechanical activation on formation of calcium titanate (CaTiO{sub 3}) from calcined mixtures of CaCO{sub 3} and TiO{sub 2} was studied by monitoring the course of this solid-state reaction by variable temperature in situ X-ray diffraction (XRD) experiments, scanning electron microscopy (SEM) and dilatometry. Two equimolar mixtures of powdered CaCO{sub 3} and TiO{sub 2} were prepared: one was mechanically activated by grinding in a high energy vibro-mill. A total of 32 X-ray diffraction data sets for each sample, collected between 30 and 1100 deg. C, were analyzed by multiphase Rietveld refinement. Quantitative phase analysis and microstructure analysis obtained from X-ray diffraction are correlated to results of scanning electron microscopy and dilatometry. In the non-activated sample, small quantities of the reactants remain in the product until 1100 deg. C. In the activated sample, the reaction results in pure CaTiO{sub 3} at 920 deg. C.
- OSTI ID:
- 20887979
- Journal Information:
- Materials Research Bulletin, Vol. 38, Issue 7; Other Information: DOI: 10.1016/S0025-5408(03)00113-2; PII: S0025540803001132; Copyright (c) 2003 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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