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Crystallization Kinetics of α‐Agl in Ag I‐Based Silver Orthoborate Glasses
Author(s) -
Taniguchi Akihiro,
Tatsumisago Masahiro,
Minami Tsutomu
Publication year - 1995
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.1151-2916.1995.tb08824.x
Subject(s) - differential scanning calorimetry , crystallization , nucleation , materials science , kinetics , quenching (fluorescence) , scanning electron microscope , microstructure , glass transition , isothermal process , crystal growth , crystallography , analytical chemistry (journal) , mineralogy , thermodynamics , chemistry , fluorescence , metallurgy , polymer , composite material , optics , chromatography , physics , quantum mechanics
Kinetics for nucleation and growth of α‐AgI crystals in AgI‐based silver orthoborate glasses, in which only α‐AgI crystals were found to crystallize in the heating process of the glasses, were studied by isothermal and nonisothermal measurements using differential scanning calorimetry and by observations of the microstructure of the glasses using scanning electron microscopy. The values of both n and m , dependent on the crystallization mechanism, were found to be 3, indicating that a constant number of nuclei of α‐AgI precipitated in a glass matrix grew three‐dimensionally. The preannealing of the glasses at temperatures between glass transition and crystallization did not affect the DSC isothermal curves in the crystal growth process, which suggested that the number of α‐Agl nuclei would have been saturated in the glass when the glasses were prepared by quenching the AgI‐based melts.