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Water-sorption processes near grain boundaries in the MgO-Al₂O₃ ceramics prepared at different temperatures were studied using positron annihilation lifetime spectroscopy. Numerical values of three- and four-component treatment of spectra were used for study of physical- and chemical-sorption processes in the MgO-Al₂O₃ ceramics. To apply mathematical approach in the form of positron-positronium trapping...
Temperature sensitive thick films based on spinel-type semiconducting ceramics of different chemical composition Cu_{0.1}Ni_{0.1}Co_{1.6}Mn_{1.2}O_{4} (with p^{+}-types of electrical conductivity), Cu_{0.1}Ni_{0.8}Co_{0.2}Mn_{1.9}O_{4} (with p-types of electrical conductivity) and their multilayer p^{+}-p structures were fabricated and studied. These thick-film elements possess good electrophysical...
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