Concerning the Data of Numerical and Physical Experiments in Studying the Adsorption of Gas and Vapors in Micropores of Active Carbons

Protection of Metals and Physical Chemistry of Surfaces - The conditions for carrying out molecular dynamics calculations of adsorption isotherms of gases and vapors in micropores of active carbons...     

Prospects of Using Boron Powders As Fuel. III. Influence of Polymer Binders on the Composition of Condensed Gasification Products of Model Boron-Containing Compositions

Combustion, Explosion, and Shock Waves - The effect of polymer binders on the thermal behavior, combustion, and composition of condensed gasification products of model boron-containing compositions...     

Thermodynamics of methane adsorption on X type zeolites at supercritical temperatures

Methods describing isotherms and thermodynamic properties of methane adsorption on various cationic forms of X-type zeolite at temperatures above critical ones are considered.     

Controlled fiber-optic phase inverter of electrical signals

A unique design is suggested for a phase inverter with the output signal phase difference regulated by the frequency of an external frequency synthesizer. We examine the possibilities of using it as a basis for a phase-angle calibrator (standard) as well as for an instrument to measure the frequency instability of frequency standards in time-signal services and other applications. Translated from Izmeritel'naya Tekhnika, No. 2, pp. 26–29, February, 1997.     

Numerical Simulation of Adsorption Equilibria of Gases on Microporous Active Carbons

Protection of Metals and Physical Chemistry of Surfaces - It has been demonstrated that adsorption isotherms on microporous activated carbons calculated by the method of molecular dynamics at...     

Special state standard for the unit of phase shift between two voltages at 1×10−2 to 2×107 Hz

Translated from Izmeritel'naya Tekhnika, No. 8, pp. 3–5, August, 1989.     

The Theory of Volume Filling Micropores at Temperatures above Those Critical for Absorbances

Protection of Metals and Physical Chemistry of Surfaces - Based on a numerical experiment, it is proven that the Dubinin theory of micropore filling can be extended to adsorption equilibria at...     

5‐Amino‐3,4‐dinitropyrazole as a Promising Energetic Material

The nitrogen‐rich energetic compound 5‐amino‐3,4‐dinitropyrazole (5‐ADP) was investigated using complementary experimental techniques. X‐ray diffraction indicates the strong intermolecular hydrogen bonding in 5‐ADP crystals. Compound exhibits low impact sensitivity (23 J) and insensitivity to friction. The activation energy of thermolysis determined to be 230±5 kJ mol⁻¹ from DSC measurements. Accelerating rate calorimetry indicates the lower thermal stability (173 °C) of 5‐ADP than that of RDX, which is probably the main concern about using this compound. 5‐ADP also exhibits good compatibility with common energetic materials (viz. TNT, RDX, ammonium perchlorate), including an active binder. The burning rate of 5‐ADP monopropellant is higher than that of benchmark HMX, while the pressure exponent 0.51±0.04 is surprisingly low. Addition of ammonium perchlorate does not affect the pressure exponent of 5‐ADP, while the burning rate increases. The 5‐amino‐3,4‐dinitropyrazole exhibits a notable combination of combustion performance, low sensitivity, and good compatibility, which renders it as a promising energetic material.     

On the Possibility of Application of the TVFM and Lattice-Model Equations at Temperatures above the Critical Values of an Adsorptive

Molecular-dynamics calculations confirmed the applicability of the equations of the theory of volume filling of micropores and the lattice model for describing the isotherm of adsorption onto active carbons in a wide range of temperatures below and above the critical values.