Detailed Information on Publication Record
2016
High-temperature Young's moduli and dilatation behavior of silica refractories
PABST, W., E. GREGOROVA, J. KLOUZEK, A. KLOUZKOVA, P. ZEMENOVÁ et. al.Basic information
Original name
High-temperature Young's moduli and dilatation behavior of silica refractories
Name in Czech
Vysokoteplotní Youngův modul a dilatace dinasových žáromateriálů
Authors
PABST, W. (203 Czech Republic), E. GREGOROVA (203 Czech Republic), J. KLOUZEK (203 Czech Republic), A. KLOUZKOVA (203 Czech Republic), P. ZEMENOVÁ (203 Czech Republic), M. KOHOUTKOVA (203 Czech Republic), I. SEDLAROVA (203 Czech Republic), K. LANG (203 Czech Republic), M. KOTOUCEK (203 Czech Republic), L. NEVRIVOVA (203 Czech Republic) and Dalibor VŠIANSKÝ (203 Czech Republic, belonging to the institution)
Edition
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, OXFORD, ELSEVIER SCI LTD, 2016, 0955-2219
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
20504 Ceramics
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 3.454
RIV identification code
RIV/00216224:14310/16:00087600
Organization unit
Faculty of Science
UT WoS
000364254700023
Keywords (in Czech)
dinas; Youngův modul; elastický modul; dilatace; dilatometrie; cristobalit; tridymit
Keywords in English
Silica refractories; Young's modulus; Elastic modulus; Dilatation; Dilatometry; Impulse excitation; Cristobalite; Tridymite
Tags
International impact, Reviewed
Změněno: 6/4/2017 18:16, Ing. Andrea Mikešková
Abstract
V originále
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.
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