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Size Effects on Silica Polymorphism
Author(s) -
Wu ShengWei,
Wong David Shan Hill,
Lu ShihYuan
Publication year - 2002
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2002.tb00504.x
Subject(s) - tridymite , cristobalite , sintering , metastability , amorphous silica , polymorphism (computer science) , materials science , amorphous solid , phase (matter) , particle size , biogenic silica , mineralogy , chemical engineering , flux (metallurgy) , chemistry , crystallography , composite material , metallurgy , quartz , organic chemistry , geology , biochemistry , genotype , engineering , gene , oceanography , diatom
In this study, we found that the polymorphism and sintering behavior of silica can be affected by the size of starting particles. The formation of the stable tridymite phase, which is metastable unless a flux or mineralizer is present, is achieved with sintering of very fine silica particles of about 10 nm without the presence of a flux or mineralizer. Cristobalite phase is obtained as an intermediate as the amorphous phase transforms into the stable tridymite phase.