Publications – dr hab. Marek Pękała
Publications. Paramagnetic Properties and Electronic Structure of Al and Fe Q – Vanadium Oxide Bronzes. M. Pękała, A. Polaczek. Polish Journal of Chemistry 52, 353-7 (1978) Thickness and Composition Distribution of Gd-Co Amorphous Films Sputtered from a „Mosaic" Target.
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Modification of the structural and functional properties ...
The modification of the structure and function of wheat gluten because of planetary ball milling was investigated. Reduced SDS-PAGE revealed that the subunit compositions and bands of gluten did not change with an increase in grinding time. FTIR analysis showed that α-helices and β-sheets decreased, …
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Construction of Ball Mill/ Ball Mill Structure | Henan ...
Ball mill introduction. Structurally, each ball mill consists of a horizontal cylindrical shell, provided with renewable wearing liners and a charge of grinding medium. The drum is supported so as to rotate on its axis on hollow trunnions attached to the end walls (attached figure 1 ball mill). The diameter of the mill determines the pressure ...
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M. Bonnet, A. Delapalme, H. Fuess and M. Thomas ...
The precursors mixed in a stoichiometric ratio to obtain YIG were milled at room temperature in a shaker mixer mill with a ball:powder weight ratio of 10:1. A partial synthesis of YIG was achieved after 9 h of milling time by using the three sources of iron; however, a significant fraction of the product was the perovskite YFeO3.
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Study on Preparation and Characterization of Graphene ...
Taking advantage of the state-of-the-art graphene preparation technologies in China and abroad, this work studied the preparation processes of graphene for road applications based on the preliminary high-speed vibration ball milling method. This work combined numerical modeling and microscopic experiments. The preparation parameters were optimized through a …
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(PDF) The multiferroic perovskite YFeO3
The orthoferrite YFeO3 with orthorhombic perovskite structure (Pnma) has been synthesized by mild hydrothermal method. The temperature-dependent …
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Structure–Property Correlation in Fe-Al2O3 In Situ ...
In the present study, Fe-10 vol pct Al2O3 in situ nanocomposite has been derived by high-energy ball milling of Fe2O3-Fe-Al powder mixture followed by the consolidation using spark plasma sintering (SPS). The consolidated nanocomposite has bimodal-grained structure consisting of nanometer- and submicron-sized Fe grains along with nanometer-sized Al2O3, …
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AG Mill and SAG Mill - Ball Mill for Sale | Mining and ...
What is a SAG mill? The structure of the SAG mill (semi-automatic grinding mill) and the AG mill (autogenous grinding mill)are exactly the same, except that a certain proportion of auxiliary grinding media such as steel balls or steel rods are added as needed. During the process of the AG mill operation, some ores with diameters greater than 20mm but less than 80mm are not …
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Process engineering with planetary ball mills - Chemical ...
Planetary ball mills are well known and used for particle size reduction on laboratory and pilot scales for decades while during the last few years the application of planetary ball mills has extended to mechanochemical approaches. Processes inside planetary ball mills are complex and strongly depend on the processed material and synthesis and, thus, the optimum milling …
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Ball Milling's Effect on Pine Milled Wood Lignin's ...
The effect of ball milling expressed as the yield of milled wood lignin (MWL) on the structure and molar mass of crude milled wood lignin (MWLc) preparation is studied to better understand the process' fundamentals and find optimal conditions for MWL isolation (i.e., to obtain the most representative sample with minimal degradation).
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Structure and catalytic behaviour of CuO–CeO2 prepared by ...
High-energy vibratory ball milling (Super-Misuni, Nissin Giken Co. Ltd.) was employed, with a rotational speed of 710 r.p.m., where the milling atmosphere was ambient. The powders and zirconia balls (ϕ10 mm) were charged in a stainless steel vial (ϕ100 mm), where the ball-to-powder weight ratio was 18 : 1 (18 g balls per 1 g powder) and the ...
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(PDF) Yttrium orthoferrite powder obtained by the ...
Yttrium ortho ferrite (YFeO 3) powder was prepared by a mechanochemical synthesis from a mixture of Y O and α – Fe O3 powders in a planetary ball mill for 2.5 h. The obtained YFeO 3 powder sample...
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Structural characterization, dielectric, and magnetic ...
Crystal structure, and magnetic and dielectric properties were studied in Ti-doped YFeO3 polycrystalline samples. The crystal structure and chemical state of the Fe/Ti cations were characterized by a combination of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). It is found that a narrow solid-solubility limit is achieved (~ 6%) and the d0–ness of Ti4+ …
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Effect of Ball Milling on Structure of Microcrystalline ...
The main objective of this work was investigate the effect of ball milling on microcrystalline cellulose (MCC) structure. FTIR results shows there are no obvious different in the function groups of between neat and ball milling MCC. Both FTIR and WAXD analysis indicate that the crystalline of MCC samples are change with the ball milling time.
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The main components of the ball mill - Bestcrushers's blog
The main components of the ball mill Earlier in the overall structure of the several types of mill. The following will introduce the basic structure of the main components of the mill. 2.2.1 Rotary Rotary parts include: cylinder,energy-saving grinding plant grinding head (end cap and hollow shaft), linings, diaphragm plate,...
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Magnetic and thermal properties of perovskite YFeO3 single ...
Abstract In this work, we reported the magnetic and thermal properties of perovskite YFeO3 crystal grown by the floating zone method. YFeO3 crystal is a canted antiferromagnet with a weak ferromagnetic behavior. The magnetization varied nonlinearly from 0.204 emu/g to 0.173 emu/g at the temperature range of 2–300 K. Its Neel temperature is around 644.5 K.
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Synthesis of magnetically removable photocatalyst based on ...
The aim of the present work is to synthesize YFeO3 via high energy ball milling aided by the sintering process. Photocatalytic behavior along with …
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Crystal structure and multiferroic behavior of perovskite ...
Abstract We present a study of multiferroic properties of YFeO3 synthesized by means of high-energy ball milling assisted by annealing at low temperature. Fe2O3 and Y2O3 powders were mixed in a stoichiometric ratio, milled for 5 h, pressed and annealed at temperature from 773 to 1073 K. X-ray diffraction (XRD) analysis confirmed the formation of single-phase orthorhombic …
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Australian Institute for Innovative Materials | Australian ...
Effect of gallium doping and ball milling process on the thermoelectric performance of n-type ZnO, Priyanka Jood, Germanas Peleckis, Xiaolin Wang, and S X. Dou . Strongly enhanced photocurrent response for Na doped Ta3N5-nano porous structure, Yuya Kado, Robert W. Hahn, Chong-Yong Lee, and Patrik Schmuki. PDF
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Wang, Xiaolin - University of Wollongong
Structure and magnetism of ultra-small cobalt particles assembled at titania surfaces by ion beam synthesis. ... Effect of gallium doping and ball milling process on the thermoelectric performance of n-type ZnO. ... Terahertz magnetic field induced coherent spin precession in YFeO3 . Published In . Applied Physics Letters
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CN103824672A - Composite soft magnetic material thin film ...
The invention provides a composite soft magnetic material thin film based on Fe-Si-Al soft magnetic materials and a manufacturing method of the composite soft magnetic material thin film. The thin film comprises Fe-Si-Al soft magnetic powder particles, a silicon dioxide hardened network structure formed by dehydrating water glass and manganese zinc ferrite soft …
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Structural, ferroelectric, and optical properties of Bi3 ...
The calculated ferroelectric polarization for the hypothetical rhombohedral YFeO3 structure is 72 μC/cm². View. ... (0 x 1) were prepared by high-energy ball milling. The aim of this work was to ...
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(PDF) Synthesis of Vanadium-Vanadium Carbide in-situ ...
The effect of milling time on the grain size and lattice strain of the ball milled Al2124 alloy powder and the effect of sintering time and temperature on the grain size of the matrix in spark ...
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Preparation and magnetic properties of RFeO3 ...
The rare-earth orthoferrites RFeO3 (R, rare-earth element) crystallize in an orthorhombic distorted perovskite structure. RFeO3 compounds exhibit interesting physical and chemical properties because of their ionic and electronic defects. Polycrystalline nano-sized RFeO3 powders were synthesized by the sol–gel combustion method. X-ray powder diffraction indicated that …
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Atomic-scale structure of nanocrystalline ZrO prepared by ...
pared by ball milling, some controversy about the type of atomic structure and phase content has arisen. For example, Gaffet et al.8 and Chadwick et al.11 have observed a forma-tion of tetragonal and amorphous phases in nanocrystalline zirconia obtained by ball milling. On the other hand, Bid et al.6 have observed a mixture of monoclinic and ...
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Raul Carbonio - Academia.edu
Metastable YFeO3 with hexagonal structure, space group P6 3 /mmc, was obtained by thermal decomposition of Y[Fe(CN)6]·4H2O at 600 °C in air. Orthorhombic YFeO3 was obtained by the same method at T ≥ 800 °C in air. The crystal structure of orthorhombic YFeO3 was refined by Rietveld analysis using PXRD data.
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European Journal of Technique (EJT) » Submission » THE ...
The influence of sintering temperature on the structure, optical and magnetic properties of Yttrium iron oxide YFeO3 prepared via Lα-alanine assisted combustion method. Ceramics International, 43, (2017), pp. 8133-8138.
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Crystal structure and multiferroic behavior of perovskite ...
In the orthorhombic structure of YFeO 3, an octahedra is formed by O 2- ions surrounding each Fe 3+ (FeO 6 ). Then, super-exchange interaction between Fe-O-Fe bond is formed through the interaction of two FeO 6 octahedra, that share its corner where O 2- ion is located in the union of both octahedra [13], [29].
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Effect of ball milling on the characteristics of nano ...
The milling speed was set at 200 rpm and the balls-to-powder weight ratio was kept as 20:1. The milling was carried out using the planetary ball mill (Fritsch Pulverisette 5) in 30-min cycles with 25 min of milling followed by 5 min of pause to prevent overheating of the milling machine from the prolonged milling process. 2.2.
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Studies of structure and properties of graphene oxide ...
The structure and properties of the graphene oxide sheet samples were characterised by Fourier transform infrared spectroscopy, X-ray diffraction, Raman, X-ray photoelectron spectroscopy and SEM. The results indicated that the alignment of graphite oxide degraded as the duration of ball milling increased.
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