Growth of barium borate crystals from sodium fluoride solutions

M. Roth; D. Perlov

doi:10.1016/S0022-0248(96)00450-2

Growth of barium borate crystals from sodium fluoride solutions

M. Roth^*, D. Perlov

^*Corresponding author for this work

The Institute of Applied Physics

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

NaF is suggested as a new solvent for top-seeded solution growth of β-BaB₂O₄ single crystals. The BaB₂O₄-NaF pseudobinary system has been found to form a simple eutectic phase diagram with the eutectic composition corresponding to 61 mol% NaF and eutectic temperature of 754°C. Viscosity, density and volatility of the BaB₂O₄-NaF solution along the liquidus line have been determined experimentally. Lower viscosities in the entire temperature range of interest for crystal growth and a shallower liquidus slope as compared with BaB₂O₄-Na₂O solutions are the main factors allowing the growth of β-BaB₂O₄ crystals of appreciable size. The formation and distribution of solvent inclusions has been studied as well and discussed in terms of their influence on the optical quality of the crystals.

Original language	English
Pages (from-to)	734-740
Number of pages	7
Journal	Journal of Crystal Growth
Volume	169
Issue number	4
DOIs	https://doi.org/10.1016/S0022-0248(96)00450-2
State	Published - Dec 1996

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abstract = "NaF is suggested as a new solvent for top-seeded solution growth of β-BaB2O4 single crystals. The BaB2O4-NaF pseudobinary system has been found to form a simple eutectic phase diagram with the eutectic composition corresponding to 61 mol% NaF and eutectic temperature of 754°C. Viscosity, density and volatility of the BaB2O4-NaF solution along the liquidus line have been determined experimentally. Lower viscosities in the entire temperature range of interest for crystal growth and a shallower liquidus slope as compared with BaB2O4-Na2O solutions are the main factors allowing the growth of β-BaB2O4 crystals of appreciable size. The formation and distribution of solvent inclusions has been studied as well and discussed in terms of their influence on the optical quality of the crystals.",

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AU - Perlov, D.

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AB - NaF is suggested as a new solvent for top-seeded solution growth of β-BaB2O4 single crystals. The BaB2O4-NaF pseudobinary system has been found to form a simple eutectic phase diagram with the eutectic composition corresponding to 61 mol% NaF and eutectic temperature of 754°C. Viscosity, density and volatility of the BaB2O4-NaF solution along the liquidus line have been determined experimentally. Lower viscosities in the entire temperature range of interest for crystal growth and a shallower liquidus slope as compared with BaB2O4-Na2O solutions are the main factors allowing the growth of β-BaB2O4 crystals of appreciable size. The formation and distribution of solvent inclusions has been studied as well and discussed in terms of their influence on the optical quality of the crystals.

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Growth of barium borate crystals from sodium fluoride solutions

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