1999
DOI: 10.1016/s0925-8388(99)00091-2
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Formation of celsian from mechanically activated BaCO3–Al2O3–SiO2 mixtures

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Cited by 25 publications
(12 citation statements)
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“…This allowed us to achieve conversion values very close to 100 % at these sintering temperatures with increasing milling time, even for the case of materials containing considerable proportions of ZrO 2 in their composition. Thus, at these sintering temperatures a synergistic effect took place between the FA and the SBAS present in the materials and the mechanical activation given to the latter, in such a way that the Hexacelsian to Celsian conversion was in fact promoted by an increment in the milling time, in contrast with previous results reported in the literature (13). However, in order to achieve high conversion values, the milling time had to be increased in a directly proportional manner with respect to the increment in the ZrO 2 content of the materials.…”
Section: Microstructural Evolution In the Sintered Materialscontrasting
confidence: 70%
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“…This allowed us to achieve conversion values very close to 100 % at these sintering temperatures with increasing milling time, even for the case of materials containing considerable proportions of ZrO 2 in their composition. Thus, at these sintering temperatures a synergistic effect took place between the FA and the SBAS present in the materials and the mechanical activation given to the latter, in such a way that the Hexacelsian to Celsian conversion was in fact promoted by an increment in the milling time, in contrast with previous results reported in the literature (13). However, in order to achieve high conversion values, the milling time had to be increased in a directly proportional manner with respect to the increment in the ZrO 2 content of the materials.…”
Section: Microstructural Evolution In the Sintered Materialscontrasting
confidence: 70%
“…Thus, the transformation between the complex aluminosilicate structures (i.e., Hexacelsian to Celsian) was delayed by the addition of ZrO 2 . Lastly, the mechanical activation of the precursor mixtures prior to the solid-state synthesis of BAS is also known to promote the formation of Hexacelsian (13). It was hypothesized that the very fine particles with fresh surfaces created by the milling process provide the necessary conditions for the surface nucleation of Hexacelsian.…”
Section: Boletín De La Sociedad Española De Cerámica Y Vidriomentioning
confidence: 99%
“…The synergistic effect of the previously discussed factors with the mechanical activation of the precursor mixtures could help us to explain the seemingly contradictory results obtained in this work, with respect to those previously reported by S. Bosković et al (17) for BAS materials synthesized from mechanically-activated reagent grade raw materials, who found that mechanical activation promoted the surface nucleation of Hexacelsian under the particular experimental conditions employed by them. As already mentioned, in this work under certain circumstances the Hexacelsian to Celsian conversion was promoted by an increased milling time, i.e, by a decreased particle size achieved in the precursor mixtures.…”
Section: Hexacelsian To Celsian Conversion Fraction (F) In the Sintersupporting
confidence: 59%
“…It was found that the reaction rate, the apparent density and the mechanical properties of the synthesized materials increased with increasing milling time and sintering temperature. It was concluded that the mineralizing effect caused by the mentioned FA impurities aided to overcome the stabilizing effect of mechanical activation on the Hexacelsian phase, resulting in Hexacelsian to Celsian conversions higher than those previously reported by S. Bo sković et al (17) for BAS materials synthesized from mechanically-activated reagent grade raw materials.…”
Section: Introductionmentioning
confidence: 67%
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