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Crystal structure and multiferroic behavior of perovskite ...

We present a study of multiferroic properties of YFeO 3 synthesized by means of high-energy ball milling assisted by annealing at low temperature. Fe 2 O 3 and Y 2 O 3 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 structure.

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Ball size or ball mass – what matters in organic ...

Ball mass is an important parameter that is known to have an influence on the outcome of a mechanochemical reaction induced by ball-milling. A standard way of modifying the ball mass is to change the size of the ball made of the same material. In this case, however, a change in mass is accompanied by a simul Editor's Collection: Mechanochemistry The Solid State of Pharmaceuticals

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Диссертация на тему «Влияние цинка и бария на структуру и ...

48. Sorescu M. Initial stage growth mechanism of LaFeO3 perovskite through magnetomechanical ball-milling of lanthanum and iron oxides / M. Sorescu, T. Xu, A. Hannan // American Journal of Materials Science. - 2011. Vol. 1, № 1. - P. 57-66. 49.

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Presentations - Department of Physics and Materials ...

2012 Effect of Ball Milling on Magnetic Properties of Nb Substituted R2Fe16Nb1 (R: Er and Gd) Alloys, B. K. Rai and S. R. Mishra, MRS Fall 2012, Boston 2012 Synthesis, Magnetic properties, and Möss studies of Ni0.5Zn0.5AlxFe2-xO4 (0

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LaFeO3 | Scientific.Net

Abstract: Pure nanostructured LaFeO 3 with crystallite size of around 13 nm and specific surface area of 48 m 2 /g were prepared using high energy ball milling. 0.4, 2 and 5 wt% of Pd was impregnated on synthesized LaFeO 3.TPD-O 2, TPD-CO and TPR-H 2 were performed to find the effect of Pd loading on perovskite oxide properties.CO gas sensing properties of doped and pure formulation were ...

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Materials | Free Full-Text | Effect of Sintering ...

Song et al. and Wang et al. obtained BiFeO 3 nano-ceramics using precursors prepared by ball milling and sol-gel methods, respectively [24,25]. However, it should be pointed out that even using the SPS method, the impure phase still exists and …

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Double-doped YFeO3 as new electrodes for protonic ceramic ...

The synthesized powders were milled in acetone using a Fritsch Pulverisette 7 planetary micro ball mill at 400 rpm for 1 h. The green cylinder samples for electrical and thermal property measurement were pressed and finally sintered at 1250°С for 5 h. The relative density of the sintered ceramic samples was higher than 90% from the ...

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How Ball Mills Work (Engineering and Mining) - YouTube

Learn how a ball mill works, all of its main parts and some of its design features! This 3D animated video allows you to see all the internal parts of a ball...

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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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Yttrium Iron Garnet: Properties and Applications Review ...

Due to a fast progress in the development of communication systems, the dielectric and magnetic ceramics (ferrites) have become attractive to be used in devices. Although the ferrites of the spinel type were the first material to be used in the microwave range, garnets have smaller dielectric losses and, therefore, are chosen for many applications.

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DEM Simulation of Tumbling Ball Mill - YouTube

DEM simulation of ball mill (200 000 particles) in MUSEN simulation systemContact: Maksym Dosta [email protected]

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Enhanced multiferroic properties of YFeO 3 by doping with ...

Stoichiometric mixtures of Y2O3, Fe2O3 and Bi2O3 were mixed and milled for 5 h using a ball to powder weight ratio of 10:1 by high-energy ball milling. The obtained powders were pressed at 1500 MPa and sintered at 700 °C for 2 h.

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Figure 2 from Structural characterization, dielectric, and ...

Fig. 2 (Color online) Cell parameters and volume as a function of Ti for YFe1−xTixO3. Note that a, b, c, and V tend to increase for x = 0.00, 0.02, 0.04, 0.06, y 0.075 compositions - "Structural characterization, dielectric, and magnetic properties of Ti-doped YFeO3 multiferroic compound"

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Microstructures and multiferroic properties of YFe1−x Mn x ...

YFe1−x Mn x O3 (x = 0.1, 0.2, and 0.4) dense ceramics were prepared by SPS (spark plasma sintering). The dielectric characteristics were evaluated over broad temperature and frequency ranges, and an obvious dielectric relaxation was observed. It was a thermally activated process following the Arrhenius law, and the activated energy decreased with increasing Mn-content. Obvious …

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Mulino a biglie - Wikipedia

Un mulino a biglie, una specie di tritatutto, è un apparecchio cilindrico usato per macinare (o miscelare) materiali come minerali, sostanze chimiche, materie prime per la ceramica e colori. I mulini a sfere di tipo gravitazionale ruotano attorno ad un asse orizzontale, parzialmente riempiti con il materiale da triturare più i mezzi di macinazione, che possono essere elementi diversificati ...

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Electromagnetic Properties of YIG Polycrystalline Ceramics ...

Abstract Pure phase Y3Fe5O12 (YIG) ceramic was successfully produced by tape-casting forming process and one-step solid-state sintering method. The activation energy for densification was calculated to be 183.81 kJ/mol. Pure YIG ceramic with a relative density as high as 99.8% was fabricated. The existence of O vacancy and Fe2+ ions was ...

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(PDF) Synthesis of YFeO3 by thermal decomposition of ...

Two new peaks istic of YFeO3 appears and more YFeO3 characteristic XRD peaks appear: one of them constitutes a low-angle tail of the peak appear as the annealing is continued till 120 h and 203 h (Fig. 5d). of Y2 O3 (2ϑ ≈ 29.3 ) while the other appear at 2ϑ ≈ 32.4 .

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Dielectric properties of BiFeO3 ceramics obtained from ...

The above results are quite similar to those reported earlier in Ba(Fe1/2Nb1/2)O3 [46] Ba(Fe1/2Ta1/2)O3 [33] and YFeO3 [29]. 4 Conclusions BFO ceramic with addition of Bi25FeO40 secondary phase was obtained from nanopowders produced by high energy ball milling of …

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Enhanced Multiferroic Properties of YFeO3 by Doping …

Tthe present work studied the cationic substitution of Y3+ by Bi3+ on the crystal structure of orthorhombic YFeO3 and its effect over magnetic, dielectric and electric properties of multiferroic yttrium orthoferrite. Stoichiometric mixtures of Y2O3, Fe2O3 and Bi2O3 were mixed and milled for 5 h using a ball to powder weight ratio of 10:1 by high-energy ball milling.

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Ball Mill Critical Speed & Working Principle - YouTube

https:// Learn about Ball Mill Critical Speed and its effect on inner charge movements. The effect of Ball Mill RPM s...

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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 structure.

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Structure of YFeO 3 . | Download Scientific Diagram

Yttrium orthoferrite (YFeO3) powder was prepared by a mechanochemical synthesis from a mixture of Y2O3 and α-Fe2O3 powders in a planetary ball mill for 2.5 …

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A synchrotron X-ray study of the electron density in YFeO3 ...

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 … Expand. 16. PDF. Save. Alert. Studies on structural, electrical, …

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Magnetic and Möss studies of pure and Ti-doped YFeO …

to milling for the times shown. It is clear that milling swiftly induces the reaction between Y2O3 and 10 % Ti-doped α-Fe2O3 (or α-Fe2O3) leading to the formation of a perovskite-related Ti-doped (or pure) YFeO3 phase. The reaction is almost complete after 25 h of milling except for as small amounts of un-reacted α-Fe2O3 as indicated by the ...

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Proceedings - The University of Memphis - The University ...

Effect of Ball Milling on Magnetic Properties of Nb Substituted R2Fe16Nb1 (R: Er and Gd) Alloys, B. K. Rai and S. R. Mishra, MRS Proceeding, 2013, Volume 1516; mrsf12-1516-jj03-47

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Temperature and frequency dependence of dielectric ...

We report a dielectric study in wide frequency and temperature ranges of yttrium orthoferrite, YFeO 3, in order to obtain the temperature-frequency dependence of the dielectric relaxation processes.A mixture of oxide powders (Y 2 O 3 and Fe 2 O 3) was activated by high-energy ball milling.The mechanically activated powders were pressed and sintered at 1073 K.

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High Energy Ball Mill Emax - Retsch - YouTube

The High Energy Ball Mill Emax is an entirely new type of laboratory ball mill, especially developed for high energy milling. Product details:

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Mechano-Synthesized Orthoferrite Starting from Wüstite ...

Stoichiometric mixtures of FeO and Y2O3 were milled and heat treated to obtain yttrium iron garnet, Y3Fe5O12. Two types of heating systems were used: one, a spark plasma sintering machine and the second, an electrical oven. The magnetic properties of the resulting specimens have been analyzed and discussed as a function of the grain size and the particles' morphology.

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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+ is not favored in ...

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Ball Mills - Mineral Processing & Metallurgy

In all ore dressing and milling Operations, including flotation, cyanidation, gravity concentration, and amalgamation, the Working Principle is to crush and grind, often with rob mill & ball mills, the ore in order to liberate the minerals. In the chemical and process industries, grinding is an important step in preparing raw materials for subsequent treatment.

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Mechanochemical Synthesis of YFeO3 Nanoparticles: Optical ...

Ball mills are used when higher energies are required and the milling time is of the order of hours or even days. There are a few earlier reports of mechanochemical activation being used for YFeO 3 preparation. In these cases, the traditional approach was used, starting from Fe 2 O 3 and Y 2 O 3 and milling for prolonged times, in some cases ...

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(PDF) Influence of Milling Time on the Crystallization ...

Results and Discussion The time of milling is the most crucial parameter in HEBM. Normally the time is chosen to achieve a steady state between the fracturing and cold welding of the powder particles [8]. The time required varies depending on the type of mill used, intensity of milling the ball-to-powder ratio and the temperature of milling.

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[PDF] Enhanced Multiferroic Properties of YFeO3 by Doping ...

Tthe present work studied the cationic substitution of Y3+ by Bi3+ on the crystal structure of orthorhombic YFeO3 and its effect over magnetic, dielectric and electric properties of multiferroic yttrium orthoferrite. Stoichiometric mixtures of Y2O3, Fe2O3 and Bi2O3 were mixed and milled for 5 h using a ball to powder weight ratio of 10:1 by high-energy ball milling.

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Enhanced Multiferroic Properties of YFeO3 by Doping with Bi3+

Tthe present work studied the cationic substitution of Y3+ by Bi3+ on the crystal structure of orthorhombic YFeO3 and its effect over magnetic, dielectric and electric properties of multiferroic yttrium orthoferrite. Stoichiometric mixtures of Y2O3, Fe2O3 and Bi2O3 were mixed and milled for 5 h using a ball to powder weight ratio of 10:1 by high-energy ball milling.

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