From parallel to single crystallization kinetics in high-density amorphous ice

2013 ◽  
Vol 88 (17) ◽  
Author(s):  
Markus Seidl ◽  
Katrin Amann-Winkel ◽  
Philip H. Handle ◽  
Gerhard Zifferer ◽  
Thomas Loerting
Keyword(s):  
Crystallization Kinetics ◽  
High Density ◽  
Amorphous Ice

scholarly journals Experimental evidence for glass polymorphism in vitrified water droplets

2021 ◽  
Vol 118 (30) ◽  
pp. e2108194118
Author(s):  
Johannes Bachler ◽  
Johannes Giebelmann ◽  
Thomas Loerting
Keyword(s):  
Thermal Properties ◽  
Experimental Evidence ◽  
Crystallization Kinetics ◽  
Ambient Pressure ◽  
High Density ◽  
Liquid Droplets ◽  
First Order ◽  
Amorphous Ice ◽  
Traditionally Prepared ◽  
Amorphous Ices

The nature of amorphous ices has been debated for more than 35 years. In essence, the question is whether they are related to ice polymorphs or to liquids. The fact that amorphous ices are traditionally prepared from crystalline ice via pressure-induced amorphization has made a clear distinction tricky. In this work, we vitrify liquid droplets through cooling at ≥106 K ⋅ s−1 and pressurize the glassy deposit. We observe a first order–like densification upon pressurization and recover a high-density glass. The two glasses resemble low- and high-density amorphous ice in terms of both structure and thermal properties. Vitrified water shows all features that have been reported for amorphous ices made from crystalline ice. The only difference is that the hyperquenched and pressurized deposit shows slightly different crystallization kinetics to ice I upon heating at ambient pressure. This implies a thermodynamically continuous connection of amorphous ices with liquids, not crystals.

Convergent Raman Features in High Density Amorphous Ice, Ice VII, and Ice VIII under Pressure

2011 ◽  
Vol 115 (14) ◽  
pp. 3756-3760 ◽  
Author(s):  
Yukihiro Yoshimura ◽  
Sarah T. Stewart ◽  
Maddury Somayazulu ◽  
Ho Kwang Mao ◽  
Russell J. Hemley
Keyword(s):  
High Density ◽  
Amorphous Ice

scholarly journals X-ray studies of the transformation from high- to low-density amorphous water

2019 ◽  
Vol 377 (2146) ◽  
pp. 20180164 ◽  
Author(s):  
Daniel Mariedahl ◽  
Fivos Perakis ◽  
Alexander Späh ◽  
Harshad Pathak ◽  
Kyung Hwan Kim ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Structural Evolution ◽  
High Energy ◽  
Real Space ◽  
High Density ◽  
Low Density ◽  
X Ray ◽  
Amorphous Ice ◽  
Density State ◽  
Amorphous States

Here we report about the structural evolution during the conversion from high-density amorphous ices at ambient pressure to the low-density state. Using high-energy X-ray diffraction, we have monitored the transformation by following in reciprocal space the structure factor S OO ( Q ) and derived in real space the pair distribution function g OO ( r ). Heating equilibrated high-density amorphous ice (eHDA) at a fast rate (4 K min –1 ), the transition to the low-density form occurs very rapidly, while domains of both high- and low-density coexist. On the other hand, the transition in the case of unannealed HDA (uHDA) and very-high-density amorphous ice is more complex and of continuous nature. The direct comparison of eHDA and uHDA indicates that the molecular structure of uHDA contains a larger amount of tetrahedral motives. The different crystallization behaviour of the derived low-density amorphous states is interpreted as emanating from increased tetrahedral coordination present in uHDA. This article is part of the theme issue ‘The physics and chemistry of ice: scaffolding across scales, from the viability of life to the formation of planets'.

Non-isothermal crystallization kinetics of graphite-reinforced crosslinked high-density polyethylene composites

2020 ◽  
Vol 142 (5) ◽  
pp. 1849-1861
Author(s):  
Dimitra Kourtidou ◽  
Evangelia Tarani ◽  
Iouliana Chrysafi ◽  
Alfred Menyhard ◽  
Dimitrios N. Bikiaris ◽  
...  
Keyword(s):  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
High Density Polyethylene ◽  
High Density ◽  
Isothermal Crystallization Kinetics ◽  
Kinetics Of ◽  
Polyethylene Composites
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