Electrical conductivity and relaxation in mixed alkali tellurite glasses

2007 ◽  
Vol 126 (18) ◽  
pp. 184509 ◽  
Author(s):  
S. Ghosh ◽  
A. Ghosh
Keyword(s):  
Electrical Conductivity ◽  
Tellurite Glasses ◽  
Mixed Alkali ◽  
Alkali Tellurite Glasses

scholarly journals Fiber Drawing of LiNbO3-Doped Mixed Alkali Tellurite Glasses

1995 ◽  
Vol 103 (1202) ◽  
pp. 1073-1076 ◽  
Author(s):  
Hyun Gyu KIM ◽  
Takayuki KOMATSU ◽  
Ryuji SATO ◽  
Kazumasa MATUSITA
Keyword(s):  
Tellurite Glasses ◽  
Fiber Drawing ◽  
Mixed Alkali ◽  
Alkali Tellurite Glasses

scholarly journals The Electrical Conductivity of Some Hydrous and Anhydrous Molten Silicates as a Function of Temperature and Pressure

2021 ◽  
Author(s):  
◽  
John Satherley
Keyword(s):  
Electrical Conductivity ◽  
Quartz Crystal ◽  
Pressure Coefficient ◽  
General Picture ◽  
Water Composition ◽  
Mixed Alkali ◽  
Mixed Alkali Effect ◽  
Temperature And Pressure ◽  
Increasing Temperature ◽  
Arrhenius Temperature

<p>This thesis is concerned with the measurement and interpretation of electrical conductivity in molten silicates. Physicochemical properties and structural models of silica and silicates are reviewed first, to give a general picture of their behaviour. Electrical conductivity was measured as a function of temperature, pressure and water composition. To make these measurements an internally heated pressure vessel, designed to operate at temperatures up to 1200 degrees C and pressures up to 5 kbars was constructed. Conductivity measurements were made on the following anhydrous and hydrous silicate melts: SiO2/Na2O 60/40, 65/35, 75/25, 78/22 mol%; SiO2/Na2O/CaO 72/24/4 mol%; Mt. Erebus lava; SiO2/Na2O 78/22 mol% + ~5 wt% H2O and Mt. Erebus lava + ~4 wt% H2O in the temperature range 850-1000 degrees C and the pressure range 0-1.3 kbar. Arrhenius temperature and pressure dependencies on conductivity were observed. The pressure coefficient of conductivity was zero for the anhydrous melts well above Tg but small and positive for the hydrous silicates. Water caused ~40% reduction in conductivity when added to a melt which was accounted for in terms of the mixed alkali effect. Conductivity isobars for the hydrous silicates passed through a maximum as a function of increasing temperature. The conductivity behaviour as a function of temperature and pressure is analogous to that observed in partially ionised liquids and is intrepretated in an identical way. The range of operation of a piezoelectric alpha-quartz crystal viscometer was extended to allow measurement of viscosity as a function of temperature.</p>

Mechanical, optical, and beta/gamma shielding properties of alkali tellurite glasses: Role of ZnO

2020 ◽  
Vol 46 (18) ◽  
pp. 28594-28602 ◽  
Author(s):  
H.H. Somaily ◽  
H. Algarni ◽  
Shoroog Alraddadi ◽  
Y.S. Rammah ◽  
Tanin Nutaro ◽  
...  
Keyword(s):  
Tellurite Glasses ◽  
Shielding Properties ◽  
Alkali Tellurite Glasses
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