Magnesium Fluoride Borate Glasses for Low Phonon Energy

Li(0.8)Mg(2.1)B2O5F: the first borate fluoride with magnesium-oxygen-fluorine octahedral chains.

The first alkali metal and magnesium mixed borate fluoride, Li(0.8)Mg(2.1)B2O5F, was prepared by the high-temperature solution method. It crystallizes in the monoclinic space group P2(1)/n (no. 14) with lattice constants a = 3.0881(4) Å, b = 13.6020(2) Å, c = 9.6563(1) Å, β = 91.744(9)°, Z = 4. In the structure, a special magnesium-oxygen-fluorine octahedral chain is found in borates for the fi...

Energy flow in manganese-neodymium-doped fluoride glasses

Measurement of the time-response of the excited-state concentration of manganese and neodymium has confirmed our previous hypothesis of fast energy transfer betwen donors and acceptors in fluoride glasses. I. lNTRODUCTION The absorption and fluorescence properties of solid-state materials can often be enhanced by codoping with two ions: one ion (referred to as the donor) which absorbs the energ...

Doped Zinc Lithium Bismuth Borate Glasses

Zinc lithium bismuth borate glasses containing Er in (25x): Bi2O3:20Li2O:20ZnO: 35B2O3:xEr2O3 (where x=1, 1.5,2 mol %) have been prepared by melt-quenching method. The amorphous nature of the glasses was confirmed by x-ray diffraction studies. Optical absorption and fluorescence spectra were recorded at room temperature for all glass samples. Judd-Ofelt intensity parameters Ωλ (λ=2, 4, 6) are e...

Mechanical Properties of Alkali Borate Glasses

A GLASS is, formally, a solid that solidifies without a well-defined melting point— defined as a singular temperature at which there occurs a discontinuous change in a physical property, for example specific volume, during transition between a liquid state and its corresponding solid state—but instead exhibits a continuous change in that property over a range of temperature. Glasses tend to inh...

Dielectric dispersion in lithiumebismuth-borate glasses