scholarly journals Sodium-potassium interdiffusion in potassium-rich alkali feldspar II: Composition- and temperature-dependence obtained from cation exchange experiments

2014 ◽  
Vol 314 (9) ◽  
pp. 1300-1318 ◽  
Author(s):  
A.-K. Schaffer ◽  
E. Petrishcheva ◽  
G. Habler ◽  
R. Abart ◽  
D. Rhede ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Cation Exchange ◽  
Alkali Feldspar ◽  
Sodium Potassium

scholarly journals Особенности нелинейного СВЧ-отклика многозонных сверхпроводников на основе ферроселенида натрия-калия (Na-=SUB=-0.3-=/SUB=-K-=SUB=-0.7-=/SUB=-)-=SUB=-x-=/SUB=-Fe-=SUB=-2-y-=/SUB=-Se-=SUB=-2-=/SUB=-

2018 ◽  
Vol 60 (11) ◽  
pp. 2116
Author(s):  
Е.Е. Пестов ◽  
Ю.Н. Ноздрин ◽  
А.И. Елькина ◽  
Ю.C. Ерин ◽  
М. Лю ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Near Field ◽  
Sodium Potassium ◽  
Third Harmonic ◽  
The Third ◽  
Microwave Microscopy ◽  
Temperature Dependences ◽  
Harmonic Power

Abstract —Temperature dependences of the third-harmonic power for the (Na_0.3K_0.7)_ x Fe_2 – _ y Se_2 sodium–potassium ferroselenide single crystals have been investigated by nonlinear near-field microwave microscopy. The temperature dependence of magnetic susceptibility at a frequency of 100 kHz for this compound has been measured. The experimental results suggest a double-gap structure of the (Na_0.3K_0.7)_ x Fe_2 – _ y Se_2 superconductor.

scholarly journals Features of Thermomechanical Stability of Anionic–Cation Exchange Matrix “Polikon AC” on Viscose Non-Woven Materials

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 734
Author(s):  
Denis Terin ◽  
Marina Kardash ◽  
Sergey Korchagin ◽  
Sergey Tsyplyayev ◽  
Vladimir Cherkasov ◽  
...  
Keyword(s):  
Moisture Content ◽  
Temperature Dependence ◽  
Cation Exchange ◽  
Molecular Model ◽  
Tensile Load ◽  
Nonwoven Materials ◽  
Membrane Components ◽  
Exchange Membrane ◽  
Exchange Matrix ◽  
Constant Tensile Load

The thermomechanical stability of the anion–cation exchange matrix “Polikon AC” on viscose nonwoven materials is investigated. In this work, a molecular model of a solvation environment for experimentally obtained “Polikon AC” mosaic membranes is refined. Mosaic membranes on a viscose fiber base were fabricated by the method of polycondensation filling. The temperature dependence of deformation was investigated for dry and wet anion and cation exchange membrane components at a constant tensile load of 1.5 N and a heating rate of 8 °C/min. The effect of moisture content on the deformation of anionite and cationite fragments under a constant external tensile load of 1.5 and 3 N in a temperature range up to 100 °C was studied.

Proton magnetic resonance studies of ionic solvation in ion-exchange resins.: Part I. Sulfonated cation-exchange resins

1970 ◽  
Vol 48 (6) ◽  
pp. 917-923 ◽  
Author(s):  
T. E. Gough ◽  
H. D. Sharma ◽  
N. Subramanian
Keyword(s):  
Magnetic Resonance ◽  
Chemical Shift ◽  
Ion Exchange ◽  
Temperature Dependence ◽  
Cation Exchange ◽  
Proton Magnetic Resonance ◽  
Resin Matrix ◽  
Strong Electrolyte ◽  
Cation Exchange Resins ◽  
Exchange Resins

The proton magnetic resonance spectra of cation-exchange resins of crosslinkage X1 to X16 in the H+, Li+, Na+, K +, Rb+, Cs+, and NH4+ forms have been recorded and the values of the molal chemical shift, δM+0, are found to be −0.321, −0.005, 0.041, 0.031, 0.028, 0.015, and 0.00 (assumed) p.p.m./mole, respectively, for the cations. These values are very nearly equal to those observed in corresponding aqueous solutions, indicating that ion–solvent interactions are similar in both the resin matrix and the aqueous solution. The temperature dependence of the chemical shift shows the same trend. The effective hydration numbers calculated from the temperature dependence are 2.0 (4.81 m) for the H+ form, 4.8 (3.25 m) and 3.6 (5.26 m) for the Na+ form, 4.4 (3.9 m) for the K+ form, and 2.4 (6.18 m) for the Cs+ form. The ions in the resin phase behave as solutions of strong electrolyte, which is consistent with the polyelectrolyte gel model for the ion-exchange resin.

scholarly journals Sodium-potassium interdiffusion in potassium-rich alkali feldspar I: Full diffusivity tensor at 850  C

2014 ◽  
Vol 314 (9) ◽  
pp. 1284-1299 ◽  
Author(s):  
E. Petrishcheva ◽  
R. Abart ◽  
A.-K. Schaffer ◽  
G. Habler ◽  
D. Rhede
Keyword(s):  
Alkali Feldspar ◽  
Sodium Potassium ◽  
Diffusivity Tensor

Fluorescence Spectroscopic Studies of (Acetamide + Sodium/Potassium Thiocyanates) Molten Mixtures: Composition and Temperature Dependence

2010 ◽  
Vol 114 (15) ◽  
pp. 5066-5081 ◽  
Author(s):  
Biswajit Guchhait ◽  
Harun Al Rasid Gazi ◽  
Hemant K. Kashyap ◽  
Ranjit Biswas
Keyword(s):  
Temperature Dependence ◽  
Spectroscopic Studies ◽  
Sodium Potassium
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