MOLTEN SALTS ELECTRICAL CONDUCTIVITY IN THE SYSTEM SILVER NITRATE–SODIUM NITRATE

1952 ◽  
Vol 30 (12) ◽  
pp. 922-923 ◽  
Author(s):  
June Byrne ◽  
Helen Fleming ◽  
F. E. W. Wetmore
Keyword(s):  
Electrical Conductivity ◽  
Melting Point ◽  
Silver Nitrate ◽  
Mole Fraction ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Energy Of Activation ◽  
Equivalent Conductivity ◽  
Density Data ◽  
Arrhenius Energy

Conductivity and density data have been obtained for the system silver nitrate – sodium nitrate. The Arrhenius energy of activation for electrical migration in sodium nitrate and in the binary melts decreases with rising temperature above the melting point, as was shown previously for silver nitrate. The equivalent conductivity isotherms for the binary melts are almost linear in the mole fraction.

MOLTEN SALTS ELECTRICAL CONDUCTIVITY IN THE SYSTEM SILVER CHLORIDE – SILVER NITRATE

1951 ◽  
Vol 29 (9) ◽  
pp. 777-784 ◽  
Author(s):  
R. C. Spooner ◽  
F. E. W. Wetmore
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Silver Nitrate ◽  
Molten Salts ◽  
Silver Chloride ◽  
Simple Equation ◽  
Arrhenius Activation Energy ◽  
Density Data ◽  
Structural Forces

Conductivity and density data have been obtained for the system silver chloride – silver nitrate. The Arrhenius activation energy for electrical migration in molten silver chloride is constant at 1280 cal. mole−1 from 460 to 530 °C.; for silver nitrate there is a variation from 3300 cal. mole−1 at 220 ° to 2700 at 320 °C., which indicates a diminution of structural forces in molten silver nitrate with increase in temperature. The activation energy for binary melts of the two salts at 320 °C. is constant at 2700 cal. mole−1 from 0 to 20 mole % silver chloride; Frenkel's simple equation for the dependence of the activation energy on composition is not supported by this work.

Thermoelectric Studies of Silver Nitrate in Sodium Nitrate – Potassium Nitrate Eutectic Melt

1971 ◽  
Vol 49 (12) ◽  
pp. 2044-2047
Author(s):  
L. G. Boxall ◽  
K. E. Johnson
Keyword(s):  
Seebeck Coefficient ◽  
Silver Nitrate ◽  
Mole Fraction ◽  
Sodium Nitrate ◽  
Nitrate Concentration ◽  
Potassium Nitrate ◽  
Silver Nitrate Concentration ◽  
Eutectic Melt

The Seebeck coefficient, εT, of the thermocell Ag(T)/AgNO3 in NaNO3 − KNO3/Ag (T + ΔT) was measured as a function of silver nitrate concentration and temperature. Extrapolation of the results to unit mole fraction, N, of AgNO3 gave the value εT0 = − 277.5 − 0.136T °C (µV deg−1).For several mixed melts of AgNO3 and an alkali nitrate the function [Formula: see text] was calculated and shown to be linear in N. P was extrapolated to finite values for the pure alkali nitrates.

MOLTEN SALTS: VISCOSITY OF SILVER NITRATE

1954 ◽  
Vol 32 (9) ◽  
pp. 839-841 ◽  
Author(s):  
F. A. Pugsley ◽  
F. E. W. Wetmore
Keyword(s):  
Silver Nitrate ◽  
Temperature Dependence ◽  
Viscous Flow ◽  
Electrical Transport ◽  
Molten Salts ◽  
Energy Of Activation

Precise values for the viscosity of silver nitrate show that Frenkel's relation for comparison of the temperature dependence of viscosity and conductivity is valid for this system and that the energy of activation for viscous flow is proportional to that for electrical transport over a range of temperature.

The Determination of Thermal Diffusivities of Thermal Energy Storage Materials: Part II—Molten Salts Beyond the Melting Point

1969 ◽  
Vol 91 (3) ◽  
pp. 189-197 ◽  
Author(s):  
K. Sreenivasan ◽  
M. Altman
Keyword(s):  
Thermal Diffusivity ◽  
Melting Point ◽  
Sodium Nitrate ◽  
Lithium Fluoride ◽  
Molten Salts ◽  
Liquid Lithium ◽  
Energy Storage Materials ◽  
Flux Measurements ◽  
The Difference ◽  
Thermal Diffusivities

A quasisteady method for measuring the thermal diffusivity of molten salts at temperatures above their melting point is described. Essentially, the difference between the temperature at the surface and at the center of a cylindrical container is measured for a constant rate of surface temperature rise. The liquid, whose thermal diffusivity is to be measured, is contained in a narrow annular groove concentric with the surface. The advantages of this method are: (a) no heat flux measurements are needed; (b) no liquid temperature need be measured; (c) theoretically assumed boundary conditions can be experimentally realized; (d) absence of convection can be experimentally verified. Results of measurements are reported for liquid lithium fluoride and sodium nitrate. The results for sodium nitrate agree with previously published results. The thermal conductivity of lithium fluoride can be empirically expressed in terms of the melting point, the molecular weight and the density, as k=0.9Tm1/2ρm2/3M−7/6

Preparation and Heat Transfer/Thermal Storage Properties of High-Temperature Molten Nitrate Salts

2015 ◽  
Vol 814 ◽  
pp. 60-64
Author(s):  
Hong Tao Zhang ◽  
You Jing Zhao ◽  
Jing Li Li ◽  
Li Jie Shi ◽  
Min Wang
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Melting Point ◽  
Latent Heat ◽  
Sodium Nitrate ◽  
Molten Salts ◽  
Operating Temperature ◽  
Potassium Nitrate ◽  
Nitrate Salts ◽  
Latent Heat Of Melting

The thermal stability of molten salts, operating temperature range and latent heat of melting for the molten salts at high temperature have been studied in the present investigation. The multi-component molten salts composed of purified potassium nitrate, purified sodium nitrate were prepared by statical mixing method [1]. The stability experiments were carried out at 500 to 600°C, and the experimental result showed that the purified nitrate molten salts performed better high-temperature thermal stability and its optimum operating temperature was increased from 500°C to 550°C. DSC analysis indicated that the purified nitrate molten had a lower melting point and a higher phase change latent heat. The melting point of purified binary nitrate molten salts was sharp decreased to 225.2°C and latent heat of melting for molten salts was also reduced from 78.41J/g to 81.15J/g compared with unpurified nitrate salts. Besides, the change in the concentration of impurities by analyzing in the binary molten salts, and combination of XRD test results can be found that the degree of degradation reduce and improve the thermal efficiency of the storage of binary molten salts by purified sodium nitrate and potassium nitrate.

MOLTEN SALTS. ELECTRICAL TRANSPORT IN THE SYSTEM SILVER NITRATE–SODIUM NITRATE

1952 ◽  
Vol 30 (10) ◽  
pp. 779-782 ◽  
Author(s):  
P. M. Aziz ◽  
F. E. W. Wetmore
Keyword(s):  
Silver Nitrate ◽  
Sodium Nitrate ◽  
Electrical Transport ◽  
Molten Salts ◽  
Silver Ion ◽  
Sodium Ion ◽  
Nitrate Ion ◽  
Usual Assumption ◽  
The Individual

Relative transport fractions have been measured in the molten system silver nitrate - sodium nitrate at 330° over the range 5 to 25 mole% silver nitrate. The individual fractions for silver, sodium, and nitrate ion have been assessed within limits. The results indicate that transport by silver ion is greater than that by sodium ion at the same concentration, although the latter has the smaller radius. The usual assumption that the largest ion (nitrate) does not transport charge is within the interpretation of the results.

Temperature and concentration dependence of equivalent conductivity in Ca(NO3)2-CaI2-H2O system

1980 ◽  
Vol 45 (6) ◽  
pp. 1639-1645 ◽  
Author(s):  
Jindřich Novák ◽  
Ivo Sláma
Keyword(s):  
Linear Function ◽  
Concentration Dependence ◽  
Mole Fraction ◽  
Constant Temperature ◽  
Salt Concentration ◽  
Free Water ◽  
Water Molecules ◽  
Equivalent Conductivity ◽  
Calcium Salts ◽  
Fraction I

The dependence of the equivalent conductivity on the temperature and composition of the Ca(NO3)2-CaI2-H2O system was studied. The ionic fraction [I-]/([I-] + [NO-3]) was changed from 0.1 to 0.5, the mole fraction of calcium salts (assumed in anhydrous form in the presence of free water molecules) was 0.075-0.200. The equivalent conductivity was found to be a linear function of the ionic fraction at constant temperature and salt concentration.

scholarly journals The Isotope Effect for Electromigration of Sodium Ions in Molten Sodium Nitrate

1972 ◽  
Vol 27 (2) ◽  
pp. 288-293
Author(s):  
Nobufusa Saito ◽  
Katsumi Hirano ◽  
Kohei Okuyama ◽  
Isao Okada
Keyword(s):  
Melting Point ◽  
Isotope Effect ◽  
Sodium Nitrate ◽  
Mass Effect ◽  
Relative Difference ◽  
Internal Mass ◽  
Sodium Ions ◽  
Molten Sodium

AbstractThe relative difference (Δb/b) between the internal electromigration mobilities of 22Na and 24Na in molten NaNO3 has been measured in the range 340 - 515 °C. The internal mass effect, μint= (Δb/b)/(Δm/m) is - 0.056 at 340 °C (melting point 308 °C), - 0.079 at 435 °C and - 0.068 at 515 °C. The errors in μint are ±0.002.

A theoretical extension for the electrical conductivity of molten salts

2012 ◽  
Vol 38 (1) ◽  
pp. 45-56 ◽  
Author(s):  
Masanobu Kusakabe ◽  
Shigeharu Takeno ◽  
Takahiro Koishi ◽  
Shigeki Matsunaga ◽  
Shigeru Tamaki
Keyword(s):  
Electrical Conductivity ◽  
Molten Salts

scholarly journals Development of Antibacterial and Antifungal Triazole Chromium(III) and Cobalt(II) Complexes: Synthesis and Biological Activity Evaluations

Molecules ◽  
2018 ◽  
Vol 23 (8) ◽  
pp. 2013 ◽  
Author(s):  
Ricardo Murcia ◽  
Sandra Leal ◽  
Martha Roa ◽  
Edgar Nagles ◽  
Alvaro Muñoz-Castro ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Biological Activity ◽  
Melting Point ◽  
Inhibitory Concentration ◽  
Vero Cells ◽  
Visible Spectroscopy ◽  
Antifungal Activities ◽  
Antibacterial And Antifungal Activities ◽  
Antibacterial And Antifungal ◽  
New Compounds

In this work, six complexes (2–7) of Cr(III) and Co(II) transition metals with triazole ligands were synthesized and characterized. In addition, a new ligand, 3,5-bis(1,2,4-triazol-1-ylmethyl)toluene (1), was synthesized and full characterized. The complexes were obtained as air-stable solids and characterized by melting point, electrical conductivity, thermogravimetric analysis, and Raman, infrared and ultraviolet/visible spectroscopy. The analyses and spectral data showed that complexes 3–7 had 1:1 (M:L) stoichiometries and octahedral geometries, while 2 had a 1:2 (M:L) ratio, which was supported by DFT calculations. The complexes and their respective ligands were evaluated against bacterial and fungal strains with clinical relevance. All the complexes showed higher antibacterial and antifungal activities than the free ligands. The complexes were more active against fungi than against bacteria. The activities of the chromium complexes against Candida tropicalis are of great interest, as they showed minimum inhibitory concentration 50 (MIC50) values between 7.8 and 15.6 μg mL−1. Complexes 5 and 6 showed little effect on Vero cells, indicating that they are not cytotoxic. These results can provide an important platform for the design of new compounds with antibacterial and antifungal activities.

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