Registration Number
0225U003104,
(0122U001959)
, R & D reports
Title
Structural aspects of optimization of functional properties of complex oxide compounds for modern phosphors, ionic conductors and magnetic materials
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Дослідження функціональних властивостей синтезованих сполук.
Head
Slobodianyk Mykola S., Доктор хімічних наук
Registration Date
20-05-2025
Organization
Taras Shevchenko National University of Kyiv
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Establishment of fundamental principles of optimization of functional properties of complex oxide compounds and substituted phases on their basis by purposeful regulation of local environment of structure-forming centers of properties and blocks of base compound and development of composites on its basis.
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The goal is to establish fundamental principles for optimizing the functional properties of complex oxide compounds and substituted phases based on them by purposefully regulating the local environment of structure-forming centers-properties and blocks of the basic compound and developing composites based on it.
The main tasks are: 1) to establish optimal conditions for the synthesis of new complex oxide compounds of various structural types, as well as iso- and heterovalently substituted phases based on them; 2) to determine the regions of glass formation in combined melts and establish the features of their thermal behavior and optimal annealing and operation temperatures; to select the composition of the matrix and combined salt melt that will meet the requirements for the phosphor; 3) to establish the conditions for the existence and synthesize new isomorphously substituted phases of the An+1BnO3n+1 type with a two-layer perovskite-like structure; 4) to determine the structure of new compounds and establish the mechanisms of the influence of substitution of atoms in different positions on their structure; 5) to investigate the functional (ion-conducting, catalytic, magnetic, luminescent, etc.) properties of the synthesized compounds.
The main working hypothesis is to use the unique structural features of complex oxide compounds with tetrahedral anions (phosphate, vanadate, molybdate, tungstate) of framework and layered types and compounds and isomorphously substituted phases of the An+1BnO3n+1 type with a 2D type of layered perovskite-like structure to regulate their properties and create new functional materials based on them. By doping cationic and anionic positions with atoms of different nature, a controlled effect will be exerted on the conduction channels with the introduction of charge carriers of different sizes, to influence the ion-conducting properties of the material.
Product Description
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Nataliia Y. Strutynska
Stus Nataliia V.
Titov Yurii О.
Terebilenko Kateryna V.
Tymoshenko Mariana V.
Fesych Ihor V.
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2025-05-20
