New data on the nature of processes in BaO-B2O3-Na2O system at B-BaB2O4 crystal growth

Eugene G. Tsvetkov; Victor I. Tyurikov

doi:10.1117/12.424644

1 May 2001 New data on the nature of processes in BaO-B₂O₃-Na₂O system at β-BaB₂O₄ crystal growth

Eugene G. Tsvetkov, Victor I. Tyurikov

Proceedings Volume 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials; (2001) https://doi.org/10.1117/12.424644
Event: Photonics West 2001 - LASE, 2001, San Jose, CA, United States

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.

Citation Download Citation

Eugene G. Tsvetkov and Victor I. Tyurikov "New data on the nature of processes in BaO-B₂O₃-Na₂O system at β-BaB₂O₄ crystal growth", Proc. SPIE 4268, Growth, Fabrication, Devices, and Applications of Laser and Nonlinear Materials, (1 May 2001); https://doi.org/10.1117/12.424644

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