Viscosity and Thermal Expansion of Mixed-Alkali Sodium-Potassium Borate Glasses

1985 ◽  
Vol 68 (9) ◽  
pp. 463-467 ◽  
Author(s):  
CHRISTOPHER M. KUPPINGER ◽  
JAMES E. SHELBY
Keyword(s):  
Thermal Expansion ◽  
Borate Glasses ◽  
Sodium Potassium ◽  
Potassium Borate ◽  
Mixed Alkali

Viscosity and Thermal Expansion of Mixed-Alkali Borate Glasses

1986 ◽  
Vol 69 (12) ◽  
pp. C-292-C-293 ◽  
Author(s):  
Christopher M. Kuppinger ◽  
James E. Shelby
Keyword(s):  
Thermal Expansion ◽  
Borate Glasses ◽  
Mixed Alkali ◽  
Alkali Borate Glasses

Luminescence characterization of Sm3+-doped sodium potassium borate glasses for laser application

2018 ◽  
Vol 766 ◽  
pp. 828-840 ◽  
Author(s):  
L. Shamshad ◽  
N. Ali ◽  
Ataullah ◽  
J. Kaewkhao ◽  
G. Rooh ◽  
...  
Keyword(s):  
Borate Glasses ◽  
Laser Application ◽  
Sodium Potassium ◽  
Potassium Borate

The Effect of Heat Treatment on the Optical Properties of Copper-Containing Lithium-Potassium-Borate Glasses

2018 ◽  
Vol 57 (1) ◽  
pp. 116-120
Author(s):  
P.S. Shirshnev ◽  
V.L. Ugolkov ◽  
Zh.G. Snezhnaia ◽  
D.I. Panov ◽  
E.V. Shirshneva-Vaschenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Raman Scattering ◽  
Copper Ions ◽  
Xrd Analysis ◽  
Luminescence Spectra ◽  
Borate Glasses ◽  
Potassium Borate ◽  
Narrow Bands

Abstract The paper presents the investigation of lithium-potassium-alumoborate glasses (0- 25 mol.% Li2O) doped by copper ions. The effect of glass annealing on the Raman scattering patterns is discussed. It is shown that such an annealing results in drastic changes in the Raman scattering patterns for the glass with 10 mol.%of Li2O: the band at 481 cm-1 conventionally attributed to boron-oxygen bonds in metaborate rings disappears, while a set of narrow bands at 1236, 1500, and 1783 cm-1 is observed. We consider one of these bands, 1783 cm-1, as being the identifier of the formed Li(Al7B4O17) nanophase, XRD analysis supported the above suggestion. The effect of newly formed nanophase on the luminescence spectra is discussed.

scholarly journals Mixed-Alkali Effect in Borate Glasses: Thermal, Elastic, and Vibrational Properties

Solids ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 16-30
Author(s):  
Seiji Kojima
Keyword(s):  
Vibrational Properties ◽  
Borate Glasses ◽  
Lithium Borate ◽  
Cauchy Type ◽  
Oxide Glasses ◽  
Raman Scattering Spectroscopy ◽  
Alkali Ions ◽  
Mixed Alkali ◽  
Mixed Alkali Effect ◽  
Longitudinal Modulus

When oxide glasses are modified by dissimilar alkali ions, a maximum in the electric resistivity or the expansion coefficient appears, called the mixed-alkali effect (MAE). This paper reviews the MAE on the thermal, elastic, and vibrational properties of the mixed-cesium lithium borate glasses, x{(1−y)Cs2O-yLi2O}-(1−x)B2O3. For the single-alkali borate glasses, xM2O(1−x)-B2O3 (M = Li, Na, K, Rb, and Cs), the glass transition temperature, Tg = 270 °C, of a borate glass monotonically increases as the alkali content x increases. However, for the mixed-cesium lithium borate glasses the Tg shows the minimum against the lithium fraction y. The dependences of the elastic properties on the lithium fraction y were discussed regarding the longitudinal modulus, Poisson’s ratio, and Cauchy-type relation. The internal vibrational bands related to the boron-oxide structural groups and the splitting of a boson peak were discussed based on Raman scattering spectroscopy. The MAE on various physical properties are discussed on the basis of the changes in the coordination number of the borons and the nonbridging oxygens caused by the dissimilar alkali ions.

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