Magnetoelectric (1-x)AlFeO3-xBaTiO3 solid solutions with ferroelectric relaxor behavior near room temperature

Li, Y.; Wang, Y.G.; Wang, N.; Wang, F.L.; Jain, Aditya

doi:10.1016/j.ceramint.2019.12.013

Cited by 9 publications

(4 citation statements)

References 69 publications

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“…A particular reaction route to prepare compounds 1 and 2 was found by Zhou et al, who used a solid-state reaction of urea with Fe(NO 3 ) 3 •9H 2 O and FeCl 3 •6H 2 O (to prepare compounds 1 and 2, respectively) in a 6:1 molar ratio in an agate mortar with intensive grinding for 6 h. 27 Li et al used the same procedure to prepare [Fe(urea) 6 ] 2 (SO 4 ) 3 (compound 9) from Fe 2 (SO 4 ) 3 . 28 The elemental analysis of complexes 1−8, independent from the reaction routes, confirmed their Fe to urea stoichiometry as 1:6.…”

Section: Synthesis Composition and Properties Of The [Fe(urea) 6 ] 2+...mentioning

confidence: 83%

Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications

Béres,

Homonnay,

Kótai

2024

ACS Omega

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Due to their Fe-and N-containing reactive urea ligand content, the hexakis(urea-O)iron(II) and hexakis(urea-O)iron(III) complexes were found to be versatile materials in various application fields of industry and environmental protection. In our present work, we have comprehensively reviewed the synthesis, structural and spectroscopic details, and thermal properties of hexakis(urea-O)iron(II) and hexakis-(urea-O)iron(III) salts with different anions (NO

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Section: Synthesis Composition and Properties Of The [Fe(urea) 6 ] 2+...mentioning

confidence: 83%

Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications

Béres,

Homonnay,

Kótai

2024

ACS Omega

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“…The preparation method plays a key role in obtaining multiferroic perovskites and, due to the applicability of perovskites in various fields, in recent years various methods of their preparation have been developed, such as: high energy ball milling method [ 20 ], solid state reaction method [ 21 ], simple hydrothermal method [ 22 ] and coprecipitation method [ 23 , 24 ]. The Al 1−x Sb x FeO 3 multiferroic perovskite samples were prepared by following the solid-state reaction method in air atmosphere, without precautions.…”

Section: Methodsmentioning

confidence: 99%

Influence of Sb3+ Cations on the Structural, Magnetic and Electrical Properties of AlFeO3 Multiferroic Perovskite with Humidity Sensors Applicative Characteristics

Petrila

Tudorache

2022

Materials

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The effects of Sb3+ cations substitution on the structural, magnetic and electrical properties of Al1−xSbxFeO3 multiferroic perovskite are investigated. The partial or total substitution of Al3+ cations with Sb3+ cations, in stoichiometric composition Al1−xSbxFeO3 (x = 0.00, 0.25, 0.50, 0.75 and 1.00) were made in order to identify composite materials with sensors applicative properties. Multiferroic perovskite samples were prepared following technology of the ceramic solid-state method, and the thermal treatments were performed in air atmosphere at 1100 °C temperature. The X-ray diffraction studies have confirmed the phase composition of samples and scanning electron microscopy the shape of the crystallites has been evidenced. The perovskite material was subjected to representative magnetic investigations in order to highlight substitutions characteristics. Investigations on electrical properties have evidenced the substitution dependence of relative permittivity and electrical resistivity under humidity influence and the characteristics of humidity sensors based on this material. The results are discussed in term of microstructural changes induced by the substitutions degree and its sensor applicative effects.

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“…Furthermore, the existence of a large number of isomorphic compounds among the possible precursors with other trivalent ions (Me III = Fe, Cr, Al) and MO )) mixed salts (where Y = S, Cr, etc.) [36,38,[75][76][77][78][79][80][81][82][83][84][85][86] gives enormous possibilities for adjusting the compositions and performances of new catalysts. The low cobalt and permanganatecontaining mixed crystals with "inert" cations (e.g., Al) and gas-forming anions (sulfate, perchlorate) ensure the in situ preparation of "supported" (e.g., with the co-formation of Al 2 O 3 support) Co-Mn oxide catalysts.…”

Section: Characterization Of the Solid Decomposition Productsmentioning

confidence: 99%

Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis

Béres,

Dürvanger,

Homonnay

et al. 2024

Inorganics

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[Carbonatotetraamminecobalt(III)] permanganate monohydrate was synthesized first in the metathesis reaction of [Co(NH3)4CO3]NO3 and NaMnO4 in aqueous solution. Its thermal dehydration at 100 °C resulted in phase-pure [Co(NH3)4CO3]MnO4 (compound 1). Compounds 1 and 2 (i.e., the hydrated form) were studied with IR, far-IR, and low-temperature Raman spectroscopies, and their vibrational modes were assigned. The lattice parameters were determined by powder X-ray diffraction (PXRD) and single crystal X-ray diffraction (SXRD) methods for the triclinic and orthorhombic compounds 1 and 2, respectively. The detailed structure of compound 2 was determined, and the role of hydrogen bonds in the structural motifs was clarified. UV studies on compounds 1 and 2 showed the distortion of the octahedral geometry of the complex cation during dehydration because of the partial loss of the hydrogen bonds between the crystal water and the ligands of the complex cation. The thermal decomposition consists of a solid phase quasi-intramolecular redox reaction between the ammonia ligands and permanganate anions with the formation of ammonia oxidation products (H2O, NO, N2O, and CO2). The solid phase reaction product is amorphous cobalt manganese oxide containing ammonium, carbonate (and nitrate) anions. The temperature-controlled thermal decomposition of compound 2 in toluene at 110 °C showed that one of the decomposition intermediates is ammonium nitrate. The decomposition intermediates are transformed into Co1.5Mn1.5O4 spinel with MnCo2O4 structure upon further heating. Solid compound 2 gave the spinel at 500 °C both in an inert and air atmosphere, whereas the sample pre-treated in toluene at 110 °C without and with the removal of ammonium nitrate by aqueous washing, gave the spinel already at 300 and 400 °C, respectively. The molten NH4NO3 is a medium to start spinel crystallization, but its decomposition stops further crystal growth of the spinel phase. By this procedure, the particle size of the spinel product as low as ~4.0 nm could be achieved for the treatments at 300 and 400 °C, and it increased only to 5.7 nm at 500 °C. The nano-sized mixed cobalt manganese oxides are potential candidates as Fischer-Tropsch catalysts.

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Magnetoelectric (1-x)AlFeO3-xBaTiO3 solid solutions with ferroelectric relaxor behavior near room temperature

Cited by 9 publications

References 69 publications

Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications

Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications

Influence of Sb3+ Cations on the Structural, Magnetic and Electrical Properties of AlFeO3 Multiferroic Perovskite with Humidity Sensors Applicative Characteristics

Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis

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