About: Elastic anomalies in tridymite- and cristobalite-based silica materials

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Cristobalite and tridymite are the mainSiO2 phases in silica bricks, a widespread refractory product. The elastic properties of cristobalite at room temperature have been extensively studied, because it is known for auxetic behavior, i.e. negative Poisson ratios, whereas the elastic properties of tridymite are essentially unknown. Here we show that silica brick materials, consisting almost entirely of tridymite and cristobalite, exhibit remarkable anomalies in the temperature dependence of the Young modulus: in the intermediate temperature range between approximately 50 and 250 C these materials become very compliant, with stiffness minima of around 60% of the room temperature values, with a broad transition region at the low-temperature end, a sharp transition at the high-temperature end and a precisely reproducible hysteresis during heating and cooling. Furthermore, it is shown that Young's moduli at around 800 C can be more than three times as high as the room temperature values. Cristobalite and tridymite are the mainSiO2 phases in silica bricks, a widespread refractory product. The elastic properties of cristobalite at room temperature have been extensively studied, because it is known for auxetic behavior, i.e. negative Poisson ratios, whereas the elastic properties of tridymite are essentially unknown. Here we show that silica brick materials, consisting almost entirely of tridymite and cristobalite, exhibit remarkable anomalies in the temperature dependence of the Young modulus: in the intermediate temperature range between approximately 50 and 250 C these materials become very compliant, with stiffness minima of around 60% of the room temperature values, with a broad transition region at the low-temperature end, a sharp transition at the high-temperature end and a precisely reproducible hysteresis during heating and cooling. Furthermore, it is shown that Young's moduli at around 800 C can be more than three times as high as the room temperature values. (en)
Title	Elastic anomalies in tridymite- and cristobalite-based silica materials Elastic anomalies in tridymite- and cristobalite-based silica materials (en)
skos:prefLabel	Elastic anomalies in tridymite- and cristobalite-based silica materials Elastic anomalies in tridymite- and cristobalite-based silica materials (en)
skos:notation	RIV/60461373:22310/14:43898219!RIV15-GA0-22310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(GAP108/12/1170)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Kutzendörfer, Jaroslav Gregorová, Eva Pabst, Willi
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	14022
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/14:43898219
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Silica brick materials (cristobalite,tridymite); Elastic modulus (Young's modulus); Refractories; SiO2; Mechanical properties (en)
http://linked.open.../riv/klicoveSlovo	Elastic modulus (Young's modulus) Silica brick materials (cristobalite tridymite) SiO2 Mechanical properties Refractories
http://linked.open...odStatuVydavatele	BE - Belgické království
http://linked.open...ontrolniKodProRIV	[5BEEE4C64CC8]
http://linked.open...i/riv/nazevZdroje	Ceramics International
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Porous Ceramics with Tailored Elasticity and Thermal Conductivity
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	40
http://linked.open...iv/tvurceVysledku	Kutzendörfer, Jaroslav Gregorová, Eva Pabst, Willi
issn	0272-8842
number of pages	5 (xsd:int)
http://localhost/t...ganizacniJednotka	22310

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