| PABST, W., E. GREGOROVA, J. KLOUZEK, A. KLOUZKOVA, P. ZEMENOVÁ, M. KOHOUTKOVA, I. SEDLAROVA, K. LANG, M. KOTOUCEK, L. NEVRIVOVA a Dalibor VŠIANSKÝ. High-temperature Young's moduli and dilatation behavior of silica refractories. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. OXFORD: ELSEVIER SCI LTD, 2016, roč. 36, č. 1, s. 209-220. ISSN 0955-2219. Dostupné z: https://dx.doi.org/10.1016/j.jeurceramsoc.2015.09.020. |
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@article{1338582,
author = {Pabst, W. and Gregorova, E. and Klouzek, J. and Klouzkova, A. and Zemenová, P. and Kohoutkova, M. and Sedlarova, I. and Lang, K. and Kotoucek, M. and Nevrivova, L. and Všianský, Dalibor},
article_location = {OXFORD},
article_number = {1},
doi = {http://dx.doi.org/10.1016/j.jeurceramsoc.2015.09.020},
keywords = {Silica refractories; Young's modulus; Elastic modulus; Dilatation; Dilatometry; Impulse excitation; Cristobalite; Tridymite},
language = {eng},
issn = {0955-2219},
journal = {JOURNAL OF THE EUROPEAN CERAMIC SOCIETY},
title = {High-temperature Young's moduli and dilatation behavior of silica refractories},
volume = {36},
year = {2016}
}
TY - JOUR
ID - 1338582
AU - Pabst, W. - Gregorova, E. - Klouzek, J. - Klouzkova, A. - Zemenová, P. - Kohoutkova, M. - Sedlarova, I. - Lang, K. - Kotoucek, M. - Nevrivova, L. - Všianský, Dalibor
PY - 2016
TI - High-temperature Young's moduli and dilatation behavior of silica refractories
JF - JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
VL - 36
IS - 1
SP - 209-220
EP - 209-220
PB - ELSEVIER SCI LTD
SN - 09552219
KW - Silica refractories
KW - Young's modulus
KW - Elastic modulus
KW - Dilatation
KW - Dilatometry
KW - Impulse excitation
KW - Cristobalite
KW - Tridymite
N2 - Silica refractories with cristobalite-tridymite ratios between 0.83-0.86 and 1.43-1.47 and porosities of 13-17% are characterized by impulse excitation up to 1200 degrees C and by dilatometry up to 1300 degrees C. During heating, Young's moduli start to decrease from their room temperature values (9-12 GPa) to about 5-7 GPa at 200 degrees C, followed by a very steep increase at around 230 degrees C to values higher than the room temperature values and a nonlinear increase to their final high-temperature values. During cooling, Young's moduli increase even further, exhibit a maximum and a nonlinear decrease that does not follow the heating curve, a very steep decrease at around 200 degrees C and a final increase to the intial room temperature values, so that a closed loop results during thermal cycling. Dilatometric measurements confirm that the strong increase of the Young's modulus at around 230 degrees C (during heating) can be attributed to the phase transition between low- and high-temperature cristobalite, while the more gentle but still very significant changes in Young's moduli below 200 degrees C are due to the more diffuse transitions between tridymite subpolymorphs. Microcracks are identified as the primary cause of the low Young's moduli and their increase with temperature. (C) 2015 Elsevier Ltd. All rights reserved.
ER -
PABST, W., E. GREGOROVA, J. KLOUZEK, A. KLOUZKOVA, P. ZEMENOVÁ, M. KOHOUTKOVA, I. SEDLAROVA, K. LANG, M. KOTOUCEK, L. NEVRIVOVA a Dalibor VŠIANSKÝ. High-temperature Young's moduli and dilatation behavior of silica refractories. \textit{JOURNAL OF THE EUROPEAN CERAMIC SOCIETY}. OXFORD: ELSEVIER SCI LTD, 2016, roč.~36, č.~1, s.~209-220. ISSN~0955-2219. Dostupné z: https://dx.doi.org/10.1016/j.jeurceramsoc.2015.09.020.
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