Fresnoite crystal structure in glass-ceramics

Journal Article · Thu Apr 13 00:00:00 EDT 2006 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2005.10.005· OSTI ID:20891659

Ochi, Yasuo ^[1]

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1. Research and Development Division, Ohara Incorporation, Naka 2-22-28, Kunitachi, Tokyo 186-0004 (Japan)

A glass-ceramic including a crystallite of fresnoite crystal phase was prepared by crystallization of glass with a composition of 2BaO-TiO{sub 2} -3SiO{sub 2}. The length of the a-axis of fresnoite in the glass-ceramic was shorter than that of the single crystal, and that of the c-axis was longer. Parameters of the crystal structure were refined using the Rietveld method, and the refinement was terminated to a profile reliability factor of 0.080. It was concluded that atomic displacements of the single crystal depended on the crystallization-induced stress formed in the crystallization process and the thermal contraction stress created in the cooling process after crystallization, and that these stresses were responsible for the expansion and contraction of the crystal lattice.

• OSTI ID: 20891659
• Journal Information: Materials Research Bulletin, Vol. 41, Issue 4; Other Information: DOI: 10.1016/j.materresbull.2005.10.005; PII: S0025-5408(05)00384-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC DISPLACEMENTS
CERAMICS
CONTRACTION
COOLING
CRYSTAL GROWTH
CRYSTAL LATTICES
CRYSTALLIZATION
GLASS
MONOCRYSTALS
RELIABILITY
STRESSES
THERMAL EXPANSION
TITANIUM OXIDES
X-RAY DIFFRACTION