Adsorption and the electrophysical properties (changes in electrical conductivity) of thin film solid solutions and binary components of the new InSb-CdS system are studied by means of piezoquartz microweighing, IR spectroscopy and probe compensation in the temperature range of 273-353 K and a range of adsorbate gas (NH 3 , NO 2 ) pressures of 0.2-9.8 Pa. The areas of physical and chemical adsorption accom panied by the charging of the (mostly positive) surface are determined. The mechanisms and regularities of adsorption as a function of external conditions and composition of the system are established, and certain similarities and patterns of changes in the adsorption and electroconductivity, and parallelisms of the "acidbase characteristic-composition," "adsorption characteristic-composition," and "electrophysical charac teristics-composition" dependences are described. These prove to be useful in studying the adsorption mechanism and in identifying the most active components of the system relative to NH 3 and NO 2 , proposed as materials for respective sensors/detectors.
The article considers the features of changes in the radio-absorbing properties of an elastic absorber with a change in the dispersion of a functional filler. The technology of preparing the absorber and filling the covers of amplifiers in the microwave range is described. The results of the analysis of carbonyl iron powders by the methods of X-ray phase analysis, laser diffraction, scanning electron microscopy are presented.
It has been shown that a decrease in the particle size of carbonyl iron by mechanical activation helps to reduce the frequency unevenness.
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