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Tytuł: Fabrication and Crystal Structure of Sol-Gel Deposited BST Thin Films with Compositional Gradient
Autor: Czekaj, Dionizy
Lisińska-Czekaj, Agata
Plewa, J.
Słowa kluczowe: Ba1-xSrxTiO3 thin films; Compositionally graded structure; Simultaneous thermal analysis; Sol-gel method; X-ray diffraction
Data wydania: 2017
Źródło: Archives of Environmental Protection, Vol. 43, iss. 2 (2017), s. 673-678
Abstrakt: In the present research technology of compositionally graded barium strontium titanate Ba1-xSrxTiO3 thin films deposited on stainless steel substrates by sol-gel spin coating followed with thermal annealing at T = 650°C is reported. Results of thermal behavior of the sol-gel derived powders with compositions used for fabrication of graded structure (i.e. with Sr mole fraction x = 0.5, 0.4 and 0.3) are described. X-ray diffraction studies of the phase composition and crystal structure of such complex thin film configuration are given. It was found that gel powders exhibited a large total weight loss of about Δm ≈ 44-47%. Three stages of weight loss took place at temperature ranges: below T ≈ 300°C, at ΔT ≈ 300-500°C and between T = 600°C and T = 800°C. Phase analysis has shown that the dominating phase is Ba0.67Sr0.33TiO3 compound while the second phase is Ba0.7Sr0.3TiO3 or Ba0.5Sr0.5TiO3 for "up-graded" and "down-graded" structure, respectively.
DOI: 10.1515/amm-2017-0095
ISSN: 1733-3490
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