Registration Number
0217U006076,
0115U000443
, R & D reports
Title
Monocrystalline and nanostructured materials for energy and emission converters and electronics and sensor devices
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Head
Ubizskii S.B.,
Registration Date
08-02-2017
Organization
Lviv Polytechnic National University
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The physico-chemical properties of complex oxides (films GGG: Bi, Yb, YAG: Bi, Yb; powders Gd2O3: Bi, Yb; powders and ceramics of cobaltites, ferrites and chromite cobaltites of REE) were studied, resulting in: 1) The influence of technological conditions of synthesis of nano- and mikro-sized powders Gd2O3: Bi3+, Yb3+, obtained with sol-gel and meсhano-synthesis, on their photoluminescence efficiency was found. It was shown that powders Gd2O3: Bi3+, Yb3+ have photo convert properties and luminescence in the range of 950...1100 nm under excitation in the range of 260...400 nm. 2) The presence of the optical excitation energy transfer from Bi3+ -ions to Yb3+ -ions was confirmed. The mechanism of sensitization of luminescence of Yb3+ -ions in oxide materials by co-doping with bismuth was proposed. 3) The methods of synthesis of micro- and nano powders and ceramics of mixed cobaltites-ferrites and cobaltites-chromites of REE were developed. 4) The peculiarities of cationic substitution influence on the structural parameters of the synthesized powders and ceramics of mixed cobaltites-ferrites and cobaltites-chromites of REE were determined. The phase diagrams of the cobaltites-ferrites and cobaltites-chromites systems were biuld. 5) The chemical composition and physical properties of known and synthesized materials with perovskite structure were analyzed and reasonable choice of chemical composition of these materials, promising for creation of gas sensors, was proved.
Product Description
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Афанасьєв Д.М.
Бурий О.А.
Василечко Л.О.
Гурський С.Т.
Добрянський О.А.
Жидачевський Я.А.
Мартинюк Н.В.
Островський І.П.
Павлик Л.П.
Сугак Д.Ю.
Шпотюк М.В.
Яхневич У.В.
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2020-04-02
