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Balek V. Šubrt J. Rouquerol J. Llewellyn P. Zeleňák V. Bountsewa I. M. Beckman I. N. Györyová K. 《Journal of Thermal Analysis and Calorimetry》2003,71(3):773-782
Emanation thermal analysis (ETA) was used for thermal characterization of microstructure changes taking place during heating
of synthetic gibbsite sample in argon in the range of 25–1200°C. Microstructure development and the increase of the surface
area under in-situ conditions of the sample heating were characterized. The increase of the radon release rate from 130–330°C
monitored the increase of the surface area due to the dehydration of Al(OH)3. During heating of the sample in the range 450–1080°C the ETA results characterized the annealing of surface and near surface
structure irregularities of intermediate products of gibbsite heat treatment. The mathematical model for the evaluation of
the ETA experimental results was proposed. From the comparison of the experimental ETA results with the model curves it followed
that the model is suitable for the quantitative characterization of microstructure changes taking place on heating of gibbsite
sample.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Pérez-Maqueda L. A. Balek V. Poyato J. Pérez-Rodríquez J. L. Šubrt J. Bountsewa I. M. Beckman I. N. Málek Z. 《Journal of Thermal Analysis and Calorimetry》2003,71(3):715-726
Emanation thermal analysis (ETA), thermogravimetry, DTA and XRD were used in thermal characterization of natural vermiculite
(Santa Olalla, Huelva, Spain) and of Na+- and - exchanged vermiculite samples during heating in air in the range 25-1100°C. A good agreement between the results of
these methods was found. Changes in the radon release rate measured by ETA, which reflected the decrease and collapse of the
interlayer space after the release of water as well as the formation of new crystalline phases were evaluated using a mathematical
model. The model used for the evaluation was found suitable for the quantitative characterization of microstructure changes
during in situ conditions of heating of vermiculite samples.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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