Auxetic properties of silicon dioxide single crystals

M. D. Raranskiy; A. V. Oliynych-Lysiuk; R. Yu. Tashchuk; A. Ya. Struk; O. Yu. Tashchuk; S. V. Hulyk

doi:10.1117/12.2614757

20 December 2021 Auxetic properties of silicon dioxide single crystals

M. D. Raranskiy, A. V. Oliynych-Lysiuk, R. Yu. Tashchuk, A. Ya. Struk, O. Yu. Tashchuk, S. V. Hulyk

Proceedings Volume 12126, Fifteenth International Conference on Correlation Optics; 1212605 (2021) https://doi.org/10.1117/12.2614757
Event: Fifteenth International Conference on Correlation Optics, 2021, Chernivtsi, Ukraine

Abstract

A systematic study of the effect of anomalous deformations and anisotropy of elastic properties on the formation of auxetic properties of stable (α- and β-quartz, α- and β-cristobalite) and metastable (coesite and stishovite) silicon dioxide single crystals was carried out. The characteristic surfaces of Young's moduli, angular distributions of Poisson's ratios and indicating auxeticity surfaces of the above single crystals were constructed. It was found that there is an unambiguous correlation between the anisotropy parameters of the characteristic surfaces of Young’s moduli and the auxeticity of single crystals. It is shown that when approaching the points of phase transformation of α- and β-quartz (T_Φ = 846 K), α- and β-cristobalite (T_Φ = 1050 K) the auxeticity degree Sa = 1.0, and the extreme values of Poisson's ratios μ_min and μ_max take negative values and single crystals become absolute auxetics.

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M. D. Raranskiy, A. V. Oliynych-Lysiuk, R. Yu. Tashchuk, A. Ya. Struk, O. Yu. Tashchuk, and S. V. Hulyk "Auxetic properties of silicon dioxide single crystals", Proc. SPIE 12126, Fifteenth International Conference on Correlation Optics, 1212605 (20 December 2021); https://doi.org/10.1117/12.2614757

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