Crossref journal-article
Wiley
Crystal Research and Technology (311)
Abstract

AbstractAs a rule, glassy and amorphous solids are characterized by random, irregular structures. More recent examinations, however, indicated that even this group of materials possesses certain structural laws. Glassy and amorphous SiO2 samples were investigated using X‐ray diffraction. The results of this investigation can be interpreted as structural phase transitions. When subjected to a pressure‐temperature treatment (p = 7 GPa, T = 700 °C), a 15 per cent irreversible densification of vitreous silica without crystallization could be achieved. This can be interpreted as a reconstructive transformation of a certain topological structure (vitreous silica having a cristobalite topology) into another topological structure (densified vitreous silica having a quartz topology).Temperature‐dependent measurements of disperse SiO2 (porous glass, silica gels) led to the conclusion that a displacive phase transition (analogous to the α‐β‐transition in cristobalite) had taken place in the amorphous network.

Bibliography

Gerber, Th., Himmel, B., Lorenz, H., & Stachel, D. (1988). Phase transitions in vitreous and amorphous SiO1. Crystal Research and Technology, 23(10–11), 1293–1302. Portico.

Authors 4
  1. Th. Gerber (first)
  2. B. Himmel (additional)
  3. H. Lorenz (additional)
  4. D. Stachel (additional)
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Dates
Type When
Created 18 years, 7 months ago (Jan. 13, 2007, 5:45 a.m.)
Deposited 2 years ago (Sept. 1, 2023, 2:51 p.m.)
Indexed 1 year ago (Aug. 30, 2024, 3:14 p.m.)
Issued 36 years, 11 months ago (Oct. 1, 1988)
Published 36 years, 11 months ago (Oct. 1, 1988)
Published Online 19 years, 6 months ago (Feb. 19, 2006)
Published Print 36 years, 11 months ago (Oct. 1, 1988)
Funders 0

None

@article{Gerber_1988, title={Phase transitions in vitreous and amorphous SiO1}, volume={23}, ISSN={1521-4079}, url={http://dx.doi.org/10.1002/crat.2170231018}, DOI={10.1002/crat.2170231018}, number={10–11}, journal={Crystal Research and Technology}, publisher={Wiley}, author={Gerber, Th. and Himmel, B. and Lorenz, H. and Stachel, D.}, year={1988}, month=oct, pages={1293–1302} }