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Tytuł:
Mechanical behaviour and phase transition mechanisms of a shape memory alloy by means of a novel analytical model
Autorzy:
Carpinteri, A.
Di Cocco, V.
Fortese, G.
Ronchei, C.
Scorza, D.
Vantadori, S.
Zanichelli, A.
Iacoviello, F.
Natali, S.
Powiązania:
https://bibliotekanauki.pl/articles/386617.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
fatigue behaviour
phase transition mechanisms
shape memory alloy
tensile cyclic test
x-ray diffraction analysis
Opis:
The aim of the present paper is to examine both the fatigue behaviour and the phase transition mechanisms of an equiatomic pseudo-elastic NiTi Shape Memory Alloy through cyclic tests (up to 100 loading cycles). More precisely, miniaturised dog-bone specimens are tested by using a customised testing machine and the contents of both austenite and martensite phase are experimentally measured by means of X-Ray diffraction (XRD) analyses. On the basis of such experimental results in terms of martensite content, an analytical model is here formulated to correlate the stress-strain relationship to the phase transition mechanisms. Finally, a validation of the present model by means of experimental data pertaining the stress-strain relationship is performed.
Źródło:
Acta Mechanica et Automatica; 2018, 12, 2; 105-108
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterisation of Mg-Zn-Ca-Y powders manufactured by mechanical milling
Autorzy:
Lesz, S.
Tański, T.
Hrapkowicz, B.
Karolus, M.
Popis, J.
Wiechniak, K.
Powiązania:
https://bibliotekanauki.pl/articles/1818808.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
Mg-based alloys
scanning electron microscopy
X-ray diffraction analysis
mechanical alloying
stopy magnezu
skaningowa mikroskopia elektronowa
rentgenowska analiza dyfrakcyjna
mechaniczna synteza
Opis:
Purpose: This paper explains mechanical synthesis which uses powders or material chunks in order to obtain phases and alloys. It is based on an example of magnesium powders with various additives, such as zinc, calcium and yttrium. Design/methodology/approach: The following experimental techniques were used: X-ray diffraction (XRD) method, scanning electron microscopy (SEM), determining particle size distributions with laser measuring, Vickers microhardness. Findings: The particle-size of a powder and microhardness value depend on the milling time. Research limitations/implications: Magnesium gained its largest application area by creating alloys in combination with other elements. Magnesium alloys used in various industry contain various elements e.g. rare-earth elements (REE). Magnesium alloys are generally made by casting processes. Consequently, the search for new methods of obtaining materials such as mechanical alloying (MA) offers new opportunities. The MA allows for the production of materials with completely new physico-chemical properties. Originality/value: Thanks to powder engineering it is possible to manufacture materials with specific chemical composition. These materials are characterized by very high purity, specified porosity, fine-grain structure, complicated designs. These are impossible to obtain with traditional methods. Moreover it is possible to refine the process even further minimalizing the need for finishing or machining, making the material losses very small or negligible. Furthermore material manufactured in such a way can be thermally or chemically processed without any problems.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 103, 2; 49--59
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Określanie właściwości popiołów lotnych przy użyciu różnych metod i urządzeń badawczych
Determination of fly ashes properties with use of different research methods and measuring devices
Autorzy:
Szponder, D. K.
Trybalski, K.
Powiązania:
https://bibliotekanauki.pl/articles/349933.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
popiół lotny
analiza densymetryczna
pomiar powierzchni właściwej
analiza granulometryczna
rentgenowska analiza dyfrakcyjna
mikroskopia skaningowa
mikroanaliza rentgenowska
analiza termiczna
fly ash
density measurement
specific surface measurements
grain size analysis
X-ray diffraction analysis
scanning microscopy
X-ray microanalysis
thermal analysis
Opis:
Popioły lotne są uciążliwymi odpadami, powstającymi z substancji mineralnych zdyspergowanych w węglu, które w wyniku jego spalenia ulegają wielu procesom fizykochemicznym. Ze względu na zastosowanie różnych metod spalania węgla, różnorodnego składu paliwa, wysoki stopień dyspersji substancji mineralnych paliwa oraz gwałtowność procesów termicznych, ziarna popiołu wykazują wysoki stopień zróżnicowania morfologicznego, składu fazowego i chemicznego. Sprawia to, że poszczególne rodzaje popiołów lotnych znacznie różnią się właściwościami, dlatego też dobór odpowiedniej metody ich utylizacji wymaga dogłębnego poznania ich właściwości fizyko-chemicznych i mineralogicznych. W publikacji zaprezentowano wybrane metody i urządzenia pomiarowe wykorzystywane do określania właściwości fizycznych surowców i odpadów mineralnych, a także ukazano możliwości ich zastosowania do scharakteryzowania właściwości popiołów lotnych.
Fly ash is noxious waste that comes from minerals substances dispersed in coal and are subjected to many physical and chemical processes during coal combustion. Because of different types of coals, different types of combustion, a high level of dispersion of mineral substances in coals and the duration of thermal processes, the particles of fly ash are diversified as to their structure, phase and chemical composition. The diversity of produced fly ash makes it necessary to determinate their physical, chemical and mineralogical properties in order to select suitable utilization method. This paper presents a few research methods and measuring devices used to determine physical, chemical and mineralogical properties of raw and waste materials and also their usefulness to characterize fly ashes properties.
Źródło:
Górnictwo i Geoinżynieria; 2009, 33, 4; 287-298
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clay minerals as palaeoenvironmental indicators in the Bathonian (Middle Jurassic) ore-bearing clays from Gnaszyn, Kraków-Silesia Homocline
Autorzy:
Dudek, T.
Powiązania:
https://bibliotekanauki.pl/articles/139440.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analiza ilościowa
chloryn
dyfrakcja rentgenowska
glaukonit
illit
iły
kaolin
Skład minerałów
chlorite
clays
glauconite
illite
kaolinite
Mineral assemblage
X-ray diffraction quantitative analysis
Opis:
This paper reports the results of X-ray diffraction quantitative mineralogical studies of the clay-rich Middle Jurassic sedimentary rocks from Gnaszyn, central Poland and their palaeoenvironmental interpretation. The palaeoenvironmental interpretation is aided by the fact that the sediments have not been significantly altered by diagenesis. The mineral composition is uniform throughout the succession: quartz, K-feldspar, plagioclase, calcite, gypsum, anhydrite, pyrite, illite, kaolinite, chlorite, and glauconite. The clay assemblage is dominated by illite, which alone accounts for about 20 wt% of the total mineral content. Kaolinite amounts usually <10 wt% and chlorite and glauconite occur in subordinate quantities. The clay mineral assemblage is largely of detrital origin and indicates rather cool and/or dry climatic conditions favouring mechanical erosion of the source rocks.
Źródło:
Acta Geologica Polonica; 2012, 62, 3; 297-305
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of X-Ray Diffraction to Analyse Phase Composition of Aluminium Alloys for Plastic Working
Autorzy:
Pachut, K.
Żelechowski, J.
Boczkal, S.
Powiązania:
https://bibliotekanauki.pl/articles/354144.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminium alloys
X-ray diffraction
qualitative phase analysis
Opis:
An attempt was made to determine phase composition of commercial aluminium alloys using X-ray diffraction. Samples for phase composition analysis were selected from the group of aluminium alloys covered by the EN 573-3:2013 standard [1]. Representative samples were taken from eight groups of alloys with different chemical composition (at least one sample from each group). The diffraction intensity was measured with a standard X-ray diffractometer in Bragg-Brentano geometry in a way that allowed identification of the weakest diffraction peaks. As a results of the performed research it has been shown that X-ray phase analysis can be used to identify the matrix of aluminium alloys, Si and crystalline intermetallic phases such as Mg2Si, Al93.38Cu6.02Fe24Si16.27, Al4.01MnSi0.74, MgZn2, Al17 (Fe3.2Mn0.8)Si2, Al65Cu20Fe15, and Cu3Mn2Al. The detectability limit of the above-mentioned phases is better than 0.5%. The research has also shown that X-ray phase analysis is applicable in the investigation of phase transformations taking place in aluminium alloys.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1315-1319
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal decomposition characterization of supergene potassium-jarosite and sodium-jarosite minerals from the northern Tibetan Plateau, China
Autorzy:
Chen, L.
Powiązania:
https://bibliotekanauki.pl/articles/949691.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
potassium-jarosite
sodium-jarosite
thermogravimetric analysis
X-ray diffraction
Opis:
The thermal decomposition of supergene potassium-jarosite and sodium-jarosite samples from the weathering profiles of sulfide deposits in the northern Tibetan Plateau, China, was investigated. Electron microprobe, scanning electron microscopy, and X-ray diffraction analyses indicated the presence of nearly pure potassium-jarosite and sodium-jarosite. Thermogravimetric analysis of the potassium-jarosite sample revealed mass losses of 11.39 wt% at 443.0 °C, 20.99 wt% at 688.3 °C, and 3.18 wt% at 779.3 °C. The thermogravimetric analysis of sodium-jarosite revealed mass losses of 11.72 wt% at 447.5 °C, 21.32 wt% at 682.6 °C, and 3.70 wt% at 716.5 °C. The results provide no evidence for water-molecule loss below 400 °C, as has been reported previously for natural potassium-jarosite and sodium-jarosite. Thermal-decomposition mechanisms have been proposed for potassium-jarosite and sodium-jarosite based on X-ray diffraction analyses of samples obtained at distinct points along the respective thermal decomposition processes. A comparison of the thermal analysis patterns of potassium-jarosite and sodium-jarosite indicates that sodium-jarosite undergoes the initiation of lattice destruction at a higher temperature.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 459-466
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Stress Values in the Surface Layer of Inconel 718 Samples Dedicated to Fatigue Tests
Autorzy:
Gadalińska, Elżbieta
Michałowski, Andrzej
Czarnewicz, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/97839.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
turning
grinding
X-ray diffraction
stress analysis
Inconel 718
Opis:
This work deals with the problem of X-ray stress determination on the samples dedicated to fatigue tests. A number of research studies point out the fact that the processing of hard, difficult to machine materials like nickel superalloys, reveals more than one trend of residual stress versus working parameters of behaviour (Lavella and Berruti, 2010). Many papers have shown that the residual stresses are dependent on a combination of a number of factors. When the above is taken into account simultaneously with the requirements of the internal General Electric specification for the fatigue tests samples preparation (Metallic test specimen preparation, low stress, 2017) the problem of turning and grinding parameters gathers significance. It is well known that the quality of the surface layer, produced during machining, is of vital importance for the fatigue life specially for the components of aircraft produced form nickel superalloys e.g. Inconel 718 (Kortabarri et al., 2011). That is why the surface layer’s properties are described in detail by the standards. The aim of the work is to determine one of the most influential features from the point of view of fatigue life, i.e. the stress state on the surface layer with one non-destructive method - the diffraction analysis.
Źródło:
Fatigue of Aircraft Structures; 2019, 11; 78-86
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase Composition of Urban Soils by X-Ray Diffraction and Mössbauer Spectroscopy Analysis
Autorzy:
Kierlik, P.
Hanc-Kuczkowska, A.
Męczyński, R.
Matuła, I.
Dercz, G.
Powiązania:
https://bibliotekanauki.pl/articles/353120.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Mössbauer spectroscopy
X-ray diffraction
environmental protection
qualitative phase analysis
topsoil
Opis:
The main purpose of this study was to identify the mineral composition of soil sample taken from the upper layer of topsoil. High absorption of chemical substance is a characteristic for humus-organic layer of topsoil. The source of those substance could be a pollutant emitted to the atmosphere by human activity. The research area includes Upper Silesia region, which is the most industrial region of Poland. In the present study, the phase composition of the top soil separates were analyzed by using X-raydiffraction and Mössbauer spectroscopy. X-ray diffraction analysis revealed the presence of seven mineral phases in the material magnetic separated by lower current (quartz, illite, kaolinite, Fe3+ oxides, hematite, magnetite and pyrite). In case of higher current were identified four phases (quartz, muscovite, kaolinite and K0.94 Na0.06 (AlSi3 O8 )). Mössbauer spectroscopy was used for an extensive analysis of iron-containing phases (pyrrhotite, magnetite, aluminosilicate oxides with Fe3+ and kaolinite/Fe2+ silicate).
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 1029-1032
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, Spectral Characterization and X – Ray Diffraction studies of some Pd(II) Complexes with Schiff bases
Autorzy:
Shaikh, J. A.
Powiązania:
https://bibliotekanauki.pl/articles/412548.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Pd(II) complexes
Schiff bases
Structural analysis
X-ray diffraction studies
Opis:
The synthesis, spectroscopic and X – Ray Diffraction studies of some Pd(II) complexes with bidentate Schiff bases are reported here. These Schiff bases were derived by condensing aldehydes like 2-hydroxy-1-naphthaldehyde, 5-chloro salicyladehyde with amines like 4-nitro aniline, 4-methyl aniline and 4-methoxy aniline. The complexes were characterized on the basis of elemental analysis, molar conductivity, spectral (IR, 1H and electronic) as well as thermal analysis. All the Pd (II) complexes exhibit square planar geometry with 1:2 (metal : ligand) stoichiometry. The X- ray diffraction studies suggest monoclinic crystal system for these complexes.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 17, 3; 272-280
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative X-Ray Diffraction Analysis of Zn-Al Based Alloys
Autorzy:
Gogola, P.
Gabalcová, Z.
Suchánek, H.
Babinec, M.
Bonek, M.
Kusý, M.
Powiązania:
https://bibliotekanauki.pl/articles/353557.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hot-dip coating
quantitative x-ray diffraction
image analysis
Zn-Al alloy
Opis:
The paper describes modification to Fm3 ̅m (space group no. 225) lattice of aluminium based α-solid solution observed in Zn-Al alloys required to properly correlate quantitative data from X-ray diffraction analysis with results obtained from quantitative scanning electron microscopy image analysis and those predicted from Zn-Al binary phase diagram. Results suggests that 14 at.% of Zn as a solute atom should be introduced in crystal lattice of aluminium to obtain correct estimation of phase quantities determined by quantitative X-ray diffraction analysis. It was shown that this modification holds for Cu mould cast as well as annealed and water-cooled samples of Zn-3wt.%. Al and Zn-5wt.% Al.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 2; 959-966
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Benzofuroxan (Benzo[1,2-c]1,2,5-oxadiazole N-oxide) Derivatives as Potential Energetic Materials: Studies on Their Synthesis and Properties
Autorzy:
Šarlauskas, J.
Anusevičius, Z.
Misiunas, A.
Powiązania:
https://bibliotekanauki.pl/articles/358164.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
heterocyclic nitro compounds
X-ray diffraction
structure analysis
density
HEDM
5,6-DNBF
Opis:
The objective of this work was to prepare benzofuroxan derivatives as new, dense, potentially energetic materials and to investigate their properties, with the main focus being on 5,6-dinitrobenzofuroxan (5,6-DNBF). 5,6-DNBF was prepared by a 3-step reaction sequence: a) 1-azido-3-nitrobenzene was synthesized by diazotation of 3-nitroaniline with sodium nitrite and subsequent reaction with sodium azide in acetic/sulfuric mixed acids; b) it was nitrated with HNO3/H2SO4 to 1-azido-2,4,5-trinitrobenzene; c) thermal cyclization of the latter compound in a polar solvent gave the desired 5,6-DNBF (m.p. 177 °C). It was fully characterized by UV/VIS, FT-IR and NMR spectroscopy, mass spectrometry and single crystal X-ray diffraction. The density of the compound (X-ray) was found to be comparatively high (1.88 g/cm3), and to be superior to the previously known, isomeric energetic material ? 4,6-dinitrobenzofuroxan (4,6-DNBF) (1.76 g/cm3). Furthermore, the synthesis of some other benzofuroxan derivatives, potentially interesting as high energy, density materials (HEDMs), has been carried out. The densities of the compounds obtained were calculated using ACD Labs software (version 4.0). Based on the results obtained, it could be concluded that 5,6-DNBF is one of the densest nitro derivatives of the benzofuroxan series, comparable to CL-14, CL-17, CL-18, and thus could have potential applications as an HEDM.
Źródło:
Central European Journal of Energetic Materials; 2012, 9, 4; 365-386
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Halloysite intercalated by potassium acetate
Autorzy:
Mariusz, Adamczyk
Katarzyna, Małycha
Karol, Kułacz
Michał, Pocheć
Kazimierz, Orzechowski
Powiązania:
https://bibliotekanauki.pl/articles/1450347.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
clay minerals
electron microscopy
XRD
X-ray diffraction
TGA
thermogravimetric analysis
dielectric spectroscopy
Opis:
Halloysite was intercalated by the mechanochemical technique from dry components. The process efficiency of 50% was achieved. The obtained intercalate differed from the material acquired using an aqueous solution of potassium acetate. The material was analyzed employing electron microscopy, thermogravimetry, X-ray powder diffraction, and dielectric spectroscopy. It was found that the molecules and/or ions present in the interlayer spaces retain some possibility of movement. This property of the material is promising for potential application as low expensive absorbers of electromagnetic radiation.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 6; 235-243
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Techniki dyfrakcji rentgenowskiej
Autorzy:
Bonarski, J
Powiązania:
https://bibliotekanauki.pl/articles/273763.pdf
Data publikacji:
2013
Wydawca:
Roble
Tematy:
dyfrakcja rentgenowska
mikrostruktura
rentgenowska ilościowa analiza fazowa
RIAF
rentgenowska tomografia teksturowa
RTT
mikroskopia akustyczna
X-ray diffraction
microstructure
X-ray quantitative phase analysis
X-ray texture chromatography
acoustic microscopy
Źródło:
LAB Laboratoria, Aparatura, Badania; 2013, 18, 4; 26-30
1427-5619
Pojawia się w:
LAB Laboratoria, Aparatura, Badania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dendrimeric peptide – montmorillonite intercalation compound
Montmorylonit interkalowany dendrymerami peptydowymi
Autorzy:
Kędzierski, M.
Janiszewska, J.
Moszumańska, I.
Powiązania:
https://bibliotekanauki.pl/articles/945857.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
dendrimeric peptides
montmorillonite
intercalation
X-ray diffraction
BET analysis
dendrymery peptydowe
montmorylonit
interkalacja
dyfrakcja rentgenowska
analiza BET
Opis:
The solution intercalation method was used for immobilization of low-molecular-mass lysine--based peptide dendrimers (Lys-D, hydrochloride form) on montmorillonite (MMT). The intercalation was confirmed by X-ray diffraction and elemental analysis of the products. Analysis of Brunauer-Emmett-Teller (BET) nitrogen adsorption–desorption isotherms indicates that both interlayer and external clay surfaces are involved in the binding of dendrimeric peptides. Depending on the structure of Lys-D, including the location of protonated amino groups in peptide branches, the intercalation involves ion exchange between sodium montmorillonite and peptide ionic groups or proceeds leaving the intact peptide counterions. Thermogravimetric analysis (TGA) studies of MMT-Lys-D compounds indicate that the major mass-loss associated with the decomposition of peptide component is shifted to higher temperatures compared to the peptide itself.
Metodą interkalacji z roztworu przeprowadzono immobilizację niskocząsteczkowych dendrymerów L-lizyny (Lys-D, w formie chlorowodorku) na montmorylonicie (MMT). Wyniki analizy metodą dyfrakcji rentgenowskiej (XRD) oraz analizy elementarnej (C, H, N, Cl) potwierdziły interkalację peptydu w MMT. Na podstawie analizy izoterm adsorpcji–desorpcji azotu Brunauera-Emmetta-Tellera (BET) stwierdzono, że związanie peptydu następuje zarówno w przestrzeni międzywarstwowej, jak i na zewnętrznej powierzchni MMT. W zależności od struktury peptydu Lys-D i położenia protonowanych grup aminowych interkalacja połączona jest z wymianą jonową pomiędzy montmorylonitem sodowym i peptydem lub przebiega z zachowaniem wyjściowych przeciwjonów chlorkowych Lys-D. Analiza TGA związków MMT-Lys-D wskazuje, że główny ubytek masy związany z rozkładem składnika peptydowego zachodzi w wyższym zakresie temperatury niż w przypadku peptydu niezwiązanego.
Źródło:
Polimery; 2016, 61, 10; 677-682
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Crystal Structure of Sol-Gel Deposited BST thin Films with Compositional Gradient
Autorzy:
Czekaj, D.
Lisińska-Czekaj, A.
Plewa, J.
Powiązania:
https://bibliotekanauki.pl/articles/356193.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Ba1-xSrxTiO3 thin films
compositionally graded structure
sol-gel method
simultaneous thermal analysis
X-ray diffraction
Opis:
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.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 673-678
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 31

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