About: Elastic properties of silica polymorphs

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Description	The elastic properties of silica phases are reviewed. Available monocrystal data for crystalline SiO2 polymorphs (low-quartz, high-quartz, low-cristobalite, high-cristobalite, stishovite) are collected from the literature, and effective elastic constants (Young's moduli, shear moduli, bulk moduli and Poisson ratios) are calculated from these using Voigt-Reuss-Hill averaging. Both experimental data and simulation results are taken into account. A table of room temperature elastic constants for crystalline silica polymorphs and silica glass is given that lists the recommended current state-of-the-art values. All data are consistent with the well-known auxetic behavior of cristobalite at room temperature, and high-temperature simulation data published for cristobalite confirm auxetic behavior for all temperatures from room temperature up to more than 1500 °C. The calculations of this paper show that also quartz can be auxetic, but only in a very limited temperature range around the low-to-high-quartz transition temperature (420-577 °C). Experimental measurements of elastic properties of tridymite and cristobalite, including high-temperature measurements, are identified as a desideratum of future research. The elastic properties of silica phases are reviewed. Available monocrystal data for crystalline SiO2 polymorphs (low-quartz, high-quartz, low-cristobalite, high-cristobalite, stishovite) are collected from the literature, and effective elastic constants (Young's moduli, shear moduli, bulk moduli and Poisson ratios) are calculated from these using Voigt-Reuss-Hill averaging. Both experimental data and simulation results are taken into account. A table of room temperature elastic constants for crystalline silica polymorphs and silica glass is given that lists the recommended current state-of-the-art values. All data are consistent with the well-known auxetic behavior of cristobalite at room temperature, and high-temperature simulation data published for cristobalite confirm auxetic behavior for all temperatures from room temperature up to more than 1500 °C. The calculations of this paper show that also quartz can be auxetic, but only in a very limited temperature range around the low-to-high-quartz transition temperature (420-577 °C). Experimental measurements of elastic properties of tridymite and cristobalite, including high-temperature measurements, are identified as a desideratum of future research. (en)
Title	Elastic properties of silica polymorphs - a review Elastic properties of silica polymorphs - a review (en)
skos:prefLabel	Elastic properties of silica polymorphs - a review Elastic properties of silica polymorphs - a review (en)
skos:notation	RIV/60461373:22310/13:43895869!RIV14-GA0-22310___
http://linked.open...avai/predkladatel	Fakulta chemické technologie
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	2014
http://linked.open...aciTvurceVysledku	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	72281
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/13:43895869
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	(negative) Poisson ratio; bulk modulus (compressive modulus); shear modulus; Young modulus (tensile modulus); silica glass; stishovite; coesite; cristobalite; tridymite; quartz; auxetic materials; elastic properties; Silica (en)
http://linked.open.../riv/klicoveSlovo	(negative) Poisson ratio Young modulus (tensile modulus) auxetic materials bulk modulus (compressive modulus) cristobalite stishovite tridymite elastic properties shear modulus coesite Silica silica glass quartz
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[B87443C121E2]
http://linked.open...i/riv/nazevZdroje	Ceramics-Silikáty
http://linked.open...in/vavai/riv/obor	JH
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Porous Ceramics with Tailored Elasticity and Thermal Conductivity
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	57
http://linked.open...iv/tvurceVysledku	Gregorová, Eva Pabst, Willi
issn	0862-5468
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	22310

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