Browsing by Author "Hadzaman, I."

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    Effects of Physical- and Chemical-AdsorbedWater near Grain Boundaries in ModifiedMgO-Al2O3 Nanoceramics Tested with Positron-Positronium Trapping Algorithm
    (2017-05-29) Klym, H.; Ingram, A.; Shpotyuk, O.; Hadzaman, I.; Chalyy, D.; Lviv Polytechnic National University, 12 Bandera Str., 79013 Lviv, Ukraine; Opole University of Technology, 75 Ozimska Str., 45370 Opole, Poland; Vlokh Institute of Physical Optics, 23 Dragomanov Str., 79005 Lviv, Ukraine; Jan Dlugosz University, 13/15 al. Armii Krajowej, 42201 Czestochowa, Poland; Drohobych Ivan Franko State Pedagogical University; I. Franko Str., 82100 Drohobych, Ukraine; Lviv State University of Life Safety, 35 Kleparivska Str.; Lviv, Ukraine
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    Integrated thick-film p-i-p+ structures based on spinel ceramics
    (Видавництво Львівської політехніки, 2012) Klym, H.; Hadzaman, I.; Shpotyuk, O.; Fu, Q.; Luo, W.; Deng, J.
    Multilayered temperature/humidity sensitive thick-film p-i-p+ structures based on spinel-type semiconducting ceramics of different chemical composition Cu0.1Ni0.1Co1.6Mn1.2O4 (with p+-type of electrical conductivity), Cu0.1Ni0.8Co0.2Mn1.9O4 (with p-type of electrical conductivity) and magnesium aluminate i-type MgAl2O4 ceramics were fabricated and investigated. These structures are shown to be successfully applied for integrated environmental sensors.
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    Sintering-modified oxymanganospinel ceramics for NTC thermistor application
    (Видавництво Львівської політехніки, 2012) Hadzaman, I.; Klym, H.; Shpotyuk, O.; Brunner, M.; Balitska, V.
    Mixed Ni-Co-Cu oxymanganospinels of Cu0.1Ni0.8Co0.2Mn1.9O4 chemical composition are first developed for possible application as high-precise NTC thermistors using nanophase segregation effects controlled by sintering technological route. It is shown that rack-salt NiO phase in these ceramics occurs a decisive role on parasitic degradation caused by thermal storage of the ceramics at the elevated temperatures.
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    Structural and magnetic properties of sintered materials on the basis of zinc oxide
    (Видавництво Львівської політехніки, 2012) Kurilo, I.; Lopatynskyi, I.; Rudyi, I.; Fruginskyi, M.; Vir, I.; Pavlovskyi, Yu.; Tsmots, V.; Hadzaman, I.; Havrylziv, A.
    Structural and magnetic properties of ceramics Zn1-xCoxO and Zn1-xCrxO are studied. Average sizes of grains are determined by scanning electron microscopy. The magnetic field dependences of magnetic susceptibility are investigated by Faraday method. The relevant theoretical models are chosen.
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    Temperature sensitive spinel-type ceramics in thick-film multilayer performance for environment sensors
    (Видавництво національного університету „Львівська політехніка”, 2009) Hadzaman, I.; Klym, H.; Shpotyuk, O.; Brunner, M.