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Proceedings Paper

New data on the nature of processes in BaO-B2O3-Na2O system at β-BaB2O4 crystal growth
Author(s): Eugene G. Tsvetkov; Victor I. Tyurikov
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Paper Abstract

We have studied features of some phase relations in the system BaO-B2O3-Na2O, using differential thermal, X-ray diffraction, and chemical analyses. Seeding and growth of barium metaborate crystals, (beta) -BaB2O4 (BBO), were investigated by the visual-polythermal method. It was established that most compositions of the system, which might be used as BBO solvents, have a rather small stability zone and during growth of bulk crystals, normally, decompose into boron- and barium-enriched components. Their composition depends on solution temperature and deviations of its components from stoichiometric ratio. The compounds synthesized at phase transformations in the system have a low solubility and the solution-melts, from which the BBO crystals are grown, have emulsion features. The quality of seeding and further formation of defects in the forming crystal structure depends on the degree of chemical homogeneity and phase stability of solution-melts.

Paper Details

Date Published: 1 May 2001
PDF: 5 pages
Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); doi: 10.1117/12.424644
Show Author Affiliations
Eugene G. Tsvetkov, Institute of Mineralogy and Petrography (Russia)
Victor I. Tyurikov, Institute of Mineralogy and Petrography (Russia)


Published in SPIE Proceedings Vol. 4268:
Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials
Jeffrey W. Pierce; Kathleen I. Schaffers; Kathleen I. Schaffers, Editor(s)

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