Mixed-alkali effect in [potassium thiocyanate-sodium thiocyanate]-calcium nitrate hydrate (0.3[xKSCH-(1 - x)NaSCN]-0.7Ca(NO3)2.4.06H2O) melts

1984 ◽  
Vol 88 (11) ◽  
pp. 2378-2382 ◽  
Author(s):  
P. Sangma ◽  
S. Mahliuddin ◽  
K. Ismail
Keyword(s):  
Calcium Nitrate ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Nitrate Hydrate ◽  
Mixed Alkali ◽  
Mixed Alkali Effect

Mixed alkali effect in sodium thiocyanate–potassium thiocyanate – acetamide melt systems

1996 ◽  
Vol 74 (5) ◽  
pp. 760-765 ◽  
Author(s):  
Sekh Mahiuddin
Keyword(s):  
Electrical Conductivity ◽  
Molar Volume ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Volume Data ◽  
Intrinsic Volumes ◽  
Mixed Alkali ◽  
Free Volume Model ◽  
Mixed Alkali Effect ◽  
Solvated Ions

Electrical conductivity and molar volume of the 0.25[xNaSCN + (1 −x)KSCN] + 0.75CH3CONH2 systems were measured as functions of temperature [Formula: see text] and composition (x = 0.0 – 1.0 mol fraction). Temperature dependence of the electrical conductivity was non-Arrhenius in nature and has been analysed by using the Vogel–Tammann–Fulcher (VTF) equation. Molar volume data were fitted to an equation similar to the VTF equation based on the free volume model. Molar volumes and intrinsic volumes were found to be additive in nature. Electrical conductivity isotherms deviate from linearity in different fashion for different temperature regions. The onset of the mixed alkali effect is governed by the anion polarization effect, by a contribution of the auto-dissociated molten acetamide, and by polymeric-type solvated ions. Key words: electrical conductivity, sodium thiocyanate, potassium thiocyanate, acetamide, mixed alkali effect.

scholarly journals Influence of glass network ionicity on the mixed‐alkali effect

2020 ◽  
Vol 11 (3) ◽  
pp. 396-414
Author(s):  
Courtney Calahoo ◽  
Yang Xia ◽  
Ru Zhou
Keyword(s):  
Glass Network ◽  
Mixed Alkali ◽  
Mixed Alkali Effect

Thermal properties of poly(ethylene oxide) complexed with sodium thiocyanate and potassium thiocyanate

1987 ◽  
Vol 20 (12) ◽  
pp. 3023-3034 ◽  
Author(s):  
C. Robitaille ◽  
S. Marques ◽  
D. Boils ◽  
J. Prud'homme
Keyword(s):  
Thermal Properties ◽  
Ethylene Oxide ◽  
Potassium Thiocyanate ◽  
Sodium Thiocyanate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

TBP extraction of lanthanides from molten calcium nitrate hydrate

2002 ◽  
Vol 90 (2) ◽  
Author(s):  
Hajimu Yamana ◽  
Hideki Asano ◽  
Toshiyuki Fujii ◽  
Ryuta Goto ◽  
Hirotake Moriyama
Keyword(s):  
Water Content ◽  
Calcium Nitrate ◽  
Phosphate Solution ◽  
Extraction Equilibrium ◽  
Nitrate Hydrate

SummaryExtraction equilibrium of lanthanides between tri-butyl phosphate solution and molten calcium nitrate hydrate, which is generally called a hydrate melt, was studied radiochemically. The dependence of the extractions on the water content of the melt was studied at 70 °C in the range of

scholarly journals OPTICAL PROPERTIES ON Li2O-K2O-WO3-B2O3 GLASS SYSTEM

2013 ◽  
Vol 22 ◽  
pp. 278-283
Author(s):  
A. EDUKONDALU ◽  
M. A. SAMEE ◽  
SHAIKH KAREEM AHMMAD ◽  
SAIR MD. TAQIULLAH ◽  
SYED RAHMAN ◽  
...  
Keyword(s):  
Glass Structure ◽  
Glass System ◽  
Alkali Concentration ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Mixed Alkali ◽  
Absorption Studies ◽  
Mixed Alkali Effect ◽  
Oxide Ion ◽  
B2o3 Glass

Mixed alkali tungsten borate glasses xLi2O–(30–x) K2O–10WO3–60B2O3 (0 < x < 30) were prepared from the melts. These glasses were characterized using X-ray diffraction, differential scanning calorimetry and density measurements. Optical absorption studies were carried out as a function of alkali content to look for mixed alkali effect (MAE) on the spectral properties of these glasses. From the study of ultraviolet absorption edge, the optical band gap energies and Urbach energies were evaluated. The average electronic polarizability of the oxide ion, optical basicity and the interaction parameters were also evaluated for all the glasses. Many of these parameters vary non-linearly exhibiting a minima or maxima with increasing alkali concentration, indicating the mixed alkali effect. An attempt is made to interpret MAE in this glass system in terms of its glass structure.

Mixed alkali effect in glasses containing MnO[sub 2]

2013 ◽  
Author(s):  
M. Sudhakara Reddy ◽  
Asha Rajiv ◽  
V. C. Veeranna Gowda ◽  
R. P. S. Chakradhar ◽  
C. Narayana Reddy
Keyword(s):  
Mixed Alkali ◽  
Mixed Alkali Effect
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