Early‐Stage Microstructure Development in Bi‐Sr‐Ca‐Cu‐O Glasses

Seong‐Jin ‐J Kim, Dunbar P. Birnie, Donald R. Uhlmann

Research output: Contribution to journalArticlepeer-review


Amorphous samples of Bi2Sr2Ca1Cu2Ox were produced by quenching from the melt. The early‐stage microstructure development in these samples was monitored using XRD, DTA, and hot‐stage TEM. It was observed that the molten glass undergoes phase separation during initial quenching and that subsequent refinement of these features generates the initial DTA exotherm during heating. This exotherm has been found for many related compositions, and has been shown not to correspond to crystallization. This initial phase separation strongly impacts the final microstructure by providing copious nucleation sites for the R‐phase that ultimately crystallizes first.

Original languageEnglish (US)
Pages (from-to)3087-3092
Number of pages6
JournalJournal of the American Ceramic Society
Issue number12
StatePublished - Dec 1993

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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