Infra-red Transmittance of Ba5Ta4O15 Crystals Grown by the Czochralski Method

Abstract

AN investigation of the barium oxide–tantalum pentoxide phase diagram revealed the existence of several phases, Ba0.44TaO2.94, a hexagonal phase1, Ba0.5TaO3 with the tetragonal tungsten-bronze structure2, Ba5Ta4O15 with a novel hexagonal structure3 and Ba(Ba0.5Ta0.5)O2.75 with an ordered cubic perovskite structure4,5. The stability of one of these compounds, Ba5Ta4O15, has been noted in several papers, in which it was reported to be the high temperature decomposition product of several complex oxides containing barium and tantalum as two of the constituents6–8. Because of the need for stable high temperature material for infra-red optical applications, attempts were made to grow single crystals of Ba5Ta4O15 so that their infra-red transmission characteristics could be measured and evaluated.

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References

  1. 1

    Galasso, F., and Katz, L., Nature, 188, 1099 (1960).

  2. 2

    Galasso, F., Katz, L., and Ward, R., J. Amer. Chem. Soc., 81, 5898 (1959).

  3. 3

    Galasso, F., and Katz, L., Acta Cryst., 14, 647 (1961).

  4. 4

    Brixner, L. H., J. Amer. Chem. Soc., 80, 3214 (1958).

  5. 5

    Galasso, F., Katz, L., and Ward, R., J. Amer. Chem. Soc., 81, 820 (1959).

  6. 6

    Galasso, F., Barrente, J. R., and Katz, L., J. Amer. Chem. Soc., 83, 2830 (1961).

  7. 7

    Galasso, F., and Pyle, J., Inorg. Chem., 2, 482 (1963).

  8. 8

    Galasso, F., and Pyle, J., submitted to Inorganic Chem.

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GALASSO, F., GEORGE, F. Infra-red Transmittance of Ba5Ta4O15 Crystals Grown by the Czochralski Method. Nature 206, 1352 (1965) doi:10.1038/2061352a0

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