Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi5Ti3FeO15Ceramic Powders Obtained by Mechanical Synthesis

Dercz, Grzegorz; Rymarczyk, J.; Hanc, A.; Prusik, Krystian; Babilas, R.; Pająk, L.; Ilczuk, J.

doi:10.12693/aphyspola.114.1623

Cited by 6 publications

(4 citation statements)

References 19 publications

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“…The mechanical alloying (MA) is a solid-state powder metallurgical process and is capable of processing Ti alloys with homogeneous microstructures and improved mechanical properties than the conventional powder metallurgy or casting techniques [10,11]. Over the past few years, mechanical alloying has shown great potential in synthesizing a wide variety of nanocrystalline, supersaturated solid solutions and amorphous phase with unique characteristics [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Structure Characterization of Biomedical Ti-Mo-Sn Alloy Prepared by Mechanical Alloying Method

et al. 2016

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The study presents the results of the influence of high energy milling on the structure of the new Ti-15Mo-5Sn [wt%] alloy for biomedical applications. During testing the powders were milled for the following milling times: 5, 15, 30, and 45 h. The milled powders were characterized by X-ray diffraction, scanning and transmission electron microscopy methods. Observation of the powder morphology after various stages of milling leads to the conclusion that with the increase of the milling time the size of the powder particles as well as the degree of aggregation change. However, a clear tendency of particles reduction at every stage of the mechanical alloying process is clearly observed. The X-ray diffraction results confirmed the presence of the α and β phases, and molybdenum. It has been found that the reflections from the Sn phase disappeared after five hours of milling, suggesting that the Sn and Ti alloying took place, leading to the creation of a titanium-based solid solution. After 30 and 45 h of mechanical alloying the formation of the β-Ti phase, the final share of which is 46(4) wt%, was observed. Furthermore, it was found that a diffraction line broadening with the increase of the milling time results from reduction of the crystallite size and an increase in the lattice distortion. The maximum level of the reduction of the crystallite size was obtained after 45 h of milling. The maximum degree of the unit cells reduction for all phases present in the powder that was being milled was also observed for this milling time.

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Section: Introductionmentioning

confidence: 99%

Structure Characterization of Biomedical Ti-Mo-Sn Alloy Prepared by Mechanical Alloying Method

et al. 2016

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“…The calculations revealed that the phase contents are 97.6 mass% and 2.4 mass% for Bi 5 Ti 3 FeO 15 and Bi 12 TiO 20 , respectively. Detailed analysis of the X-ray diffraction patterns revealed that nanocrystallization processes of these phases were observed [12]. Moreover, the sample milled for 10 h contains both crystalline and amorphous phases [13].…”

Section: Resultsmentioning

confidence: 96%

“…Detailed analysis of the X-ray diffraction patterns revealed that nanocrystallization processes of these phases were observed [12]. Moreover, the sample milled for 10 h contains both crystalline and amorphous phases [13]. The Rietveld refinement technique was used to investigate the changes in the crystal structure of the ceramic samples obtained from sintering processes performed on the previously milled samples ( Table 1).…”

Section: Resultsmentioning

confidence: 99%

Dielectric and Structural Properties of Bi5Ti3FeO15 Ceramics Obtained by Solid-State Reaction Process from Mechanically Activated Precursors

2011

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Bi 5 Ti 3 FeO 15 (BTFO), an Aurivillius compound, was synthesized via sintering the Bi 2 O 3 and Fe 2 O 3 mixture and TiO 2 oxides. The precursor material was ground in a high-energy attritorial mill for (1, 3, 5, and 10) h. The orthorhombic system Bi 5 Ti 3 FeO 15 ceramics was obtained by a solid-state reaction process at 1313 K. Phase formation behavior was investigated using differential thermal analysis (DTA), thermal gravimetric (TG), and X-ray diffraction (XRD) techniques. The frequencydependent properties of the material were investigated by impedance spectroscopy. The impedance spectroscopic method is widely used to characterize electrical properties of materials and their interfaces with electronically conducting electrodes. These studies indicate that 1h, 3h, and 5h primary high-energy ball milling followed by sintering is a promising technique for pure Bi 5 Ti 3 FeO 15 ceramic preparation, whereas the ceramics obtained from the substrates after 10h milling is a two-phase material. As the result of this investigation, the model of adjusting the Nyquist charts with a three-element R-CPE (constant phase element) series connection was proposed. It was found that the value of the dielectric constant at the Curie temperature decreases when the milling time of the substrates increases. The decrease in the dielectric constant is influenced by the great dispersion of the grains, their dense packing, and location of particular grains in relation to other grains. Moreover, the change of resistivity with frequency indicates that relaxation processes take place in the material. In conclusion, J. Dercz (B)

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“…As a result of the lack of oxygen, in the bismuthbased perovskites there occurs deformation of the crystalline structure, which consists in the formation of the so-called layered structures [3,4]. Aurivillius phases are an example of the layered structures [5][6][7]. Bismuth oxides with a layered perovskite-like structure are composed of regularly arranged (Bi 2 O 2 ) 2+ bismuth layers intertwined with the (A m-1 B m O 3m+1 ) 2 perovskite packages.…”

Section: Introductionmentioning

confidence: 99%

Rietveld Analysis of Aurivillius-Type Structure Ceramics Synthesized from Precursors Prepared by Classical and HEBM Methods

Dercz

Prusik

et al. 2013

SSP

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The aim of this study was to analyze the influence of the method of preparing the substrates in the form of simple oxides for the structure of the final Bi5Ti3FeO15ceramics. Milling of the substrates was carried out by two methods: the classical one by hand mixing in a porcelain mortar, and by high-energy. Structure studies were performed by the X-ray diffraction (XRD) method. XRD patterns were analyzed with the Rietveld method using the DBWS 9807a program. It was found out that the slightest deviation of the network parameters from the catalog data occurs for the sample obtained from simple oxides by free sintering (BTFs). Furthermore, it was also determined that the optimal high-energy time of the substrates is 5 hours. When compared to the ICDD catalog data, the resulting ceramics is a single phase one and has the lowest network parameters deviation among all samples which were subject to high-energy.

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Structural Studies with the Use of XRD and Mössbauer Spectroscopy οf Bi₅Ti₃FeO₁₅Ceramic Powders Obtained by Mechanical Synthesis

Cited by 6 publications

References 19 publications

Structure Characterization of Biomedical Ti-Mo-Sn Alloy Prepared by Mechanical Alloying Method

Structure Characterization of Biomedical Ti-Mo-Sn Alloy Prepared by Mechanical Alloying Method

Dielectric and Structural Properties of Bi5Ti3FeO15 Ceramics Obtained by Solid-State Reaction Process from Mechanically Activated Precursors

Rietveld Analysis of Aurivillius-Type Structure Ceramics Synthesized from Precursors Prepared by Classical and HEBM Methods

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