Early-stage microstructure development in Bi-Sr-Ca-Cu-O glasses

Journal Article · Tue Nov 30 23:00:00 EST 1993 · Journal of the American Ceramic Society; (United States)

OSTI ID:5492280

Kim, Seongjin; Birnie, III, D P; Uhlmann, D R ^[1]

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1. Univ. of Arizona, Tucson, AZ (United States). Dept. of Materials Science and Engineering

Amorphous samples of Bi[sub 2]Sr[sub 2]Ca[sub 1]Cu[sub 2]O[sub x] 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.

• OSTI ID: 5492280
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 76:12; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
GLASS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION ELEMENT COMPOUNDS