Surface stability of lithium triborate crystals grown from excess B2O3 solutions

A white coating can form on LiB305 (LBO) crystals grown in an ambient air atmosphere due to a surface decomposition process that occurs at high temperatures. These crystals crack severely during cooling. A study to determine the effects of the atmosphere on the stability of LBO crystal surfaces was...

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Bibliographic Details
Published in:Journal of crystal growth 1993-03, Vol.128 (1-4), p.933-937
Main Authors: Brück, E., Raymakers, R.J., Route, R.K., FeigeIson, R.S.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Theory and models of crystal growth
physics of crystal growth, crystal morphology and orientation
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Summary:A white coating can form on LiB305 (LBO) crystals grown in an ambient air atmosphere due to a surface decomposition process that occurs at high temperatures. These crystals crack severely during cooling. A study to determine the effects of the atmosphere on the stability of LBO crystal surfaces was carried out. In all cases, the surfaces of crystals exposed to atmospheres containing water vapor at high temperatures decomposed to form the lithium-rich compound, Li3BTO12. Surfaces exposed to water-free atmospheres, such as dry nitrogen or dry air, remained undamaged. LBO crystals grown under dry nitrogen did not exhibit surface decomposition during growth and did not crack on cooling.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(07)80073-X