Preparation and characterization of Ba2Co2Fe12O22 ferrite via glucose sol–gel method

Xia, Haiyan; Ye, Yunzhe; Liu, Yan; Wang, Jianbo; Xue, Desheng

doi:10.1007/s10971-011-2587-4

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…In general, the sol–gel method is superior to other techniques for its low processing temperature, low cost, precise control of composition, and homogeneous phase distribution . Various materials, such as lactic acid, Polyvinyl alcohol, and citric acid were used as chelating agent due to the ability to form stable metal complexes . Recently, saccharides materials, such as starch, sucrose, and glucose, have been applied as chelating agent to synthesize various nanopowders.…”

Section: Introductionmentioning

confidence: 99%

Infrared‐Transparent Y₂O₃–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

et al. 2015

J. Am. Ceram. Soc.

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A glucose sol-gel combustion method has been developed to synthesize composite nanopowders with equal volume fractions of Y 2 O 3 and MgO. The synthesis involves the generation of precursor foam containing Y 3+ and Mg 2+ cations via the chemical and thermal degradation of glucose molecules in aqueous solutions. Subsequent calcination of the foam gave the composite nanopowders uniform composition and surface areas of 44-62 m 2 /g depending on the relative amount of glucose. Then the nanopowder with an average particle size of 19 nm was consolidated by the hot-pressing technique with different sintering temperatures. The fabricated nanocomposite is midinfrared transparent as the result of fine grains, narrow grain size distribution, and uniform phase domains. The transmittance increases with increase in the sintering temperature and reaches 83.5% at 3-5 lm mid-infrared wave range once the temperature reaches 1350°C, which is close to the theoretical value of 85%. And it is noteworthy that the cutoff wavelength reaches 9.6 lm, which is superior to those of spinel, AlON, and sapphire. And the Vickers hardness of the sample reaches 10.0 AE 0.1 GPa, which is significantly higher than those of the coarse grained single-phase MgO and Y 2 O 3 . The results indicate that the glucose sol-gel combustion and hot-pressing technique is an effective method to fabricate infrared transparent Y 2 O 3 -MgO nanocomposites.

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Section: Introductionmentioning

confidence: 99%

Infrared‐Transparent Y₂O₃–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

et al. 2015

J. Am. Ceram. Soc.

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“…The asymmetric unit contains two cerium, one molybdenum, and seven oxygen atoms. Ce(1), Ce(2), Mo (1) Powder X-ray Diffraction (PXRD). Powder X-ray diffraction data of Ln 4 Mo 2 O 11 (Ln = La and Ce) were collected on a Rigaku Ultima IV powder X-ray diffractometer using Cu Kα (λ = 1.5418 Å) radiation.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Interestingly, while a vast number of materials have been synthesized via solid-state reactions, we know very little about what happens between the time when the reaction starts and the time we isolate the final product(s). For these reasons, predicting, designing, or targeting a complex composition is extremely challenging, and sometimes this process is helped by serendipity. − …”

Section: Introductionmentioning

confidence: 99%

In Situ Neutron Diffraction Studies of the Flux Crystal Growth of the Reduced Molybdates La₄Mo₂O₁₁ and Ce₄Mo₂O₁₁: Revealing Unexpected Mixed-Valent Transient Intermediates and Determining the Sequence of Events during Crystal Growth

et al. 2018

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Exploratory flux-mediated crystal growth is one route to discovering novel inorganic compounds, including metastable ones; however, the method does not reveal the existence of intermediates or transient species, as only the final products are isolated at the end of the reaction. Uncovering the presence of any potential intermediates or transient species is, thus, of interest and can be achieved via in situ X-ray or neutron diffraction crystal growth studies to observe, in real time, the processes occurring, including phase formation and crystal growth. In this study we investigated the processes involved in the crystal growth of La 4 Mo 2 O 11 and Ce 4 Mo 2 O 11 , two reduced Mo 5+ -containing oxides synthesized in a NaCl/CsCl eutectic flux, and studied via in situ diffraction experiments at the POWGEN beamline at the Spallation Neutron Source. These in situ studies reveal the appearance and disappearance of staring materials, intermediates, and final products. Several transient phases that formed as either single crystals or polycrystalline powders were identified and the reaction conditions (temperature and time) for their formation in single-crystals form established, enabling the use of quenching experiments to isolate these singlecrystal transient species and to carry out their structural characterization. Additionally, by changing the reactants-to-flux ratio, different reaction pathways were observed to ultimately result in the same target phase. A higher flux-to-reagent ratio was shown to favor the formation of reduced molybdenum transient phases.

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Late Mesozoic magmatism and tectonic evolution in the Southern margin of the North China Craton

Gao,

Zhao

2017

Sci. China Earth Sci.

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Preparation and characterization of Ba2Co2Fe12O22 ferrite via glucose sol–gel method

Cited by 4 publications

References 28 publications

Infrared‐Transparent Y₂O₃–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

Infrared‐Transparent Y₂O₃–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

In Situ Neutron Diffraction Studies of the Flux Crystal Growth of the Reduced Molybdates La₄Mo₂O₁₁ and Ce₄Mo₂O₁₁: Revealing Unexpected Mixed-Valent Transient Intermediates and Determining the Sequence of Events during Crystal Growth

Late Mesozoic magmatism and tectonic evolution in the Southern margin of the North China Craton

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Preparation and characterization of Ba2Co2Fe12O22 ferrite via glucose sol–gel method

Cited by 4 publications

References 28 publications

Infrared‐Transparent Y2O3–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

Infrared‐Transparent Y2O3–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

In Situ Neutron Diffraction Studies of the Flux Crystal Growth of the Reduced Molybdates La4Mo2O11 and Ce4Mo2O11: Revealing Unexpected Mixed-Valent Transient Intermediates and Determining the Sequence of Events during Crystal Growth

Late Mesozoic magmatism and tectonic evolution in the Southern margin of the North China Craton

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Infrared‐Transparent Y₂O₃–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

Infrared‐Transparent Y₂O₃–MgO Nanocomposites Fabricated by the Glucose Sol–Gel Combustion and Hot‐Pressing Technique

In Situ Neutron Diffraction Studies of the Flux Crystal Growth of the Reduced Molybdates La₄Mo₂O₁₁ and Ce₄Mo₂O₁₁: Revealing Unexpected Mixed-Valent Transient Intermediates and Determining the Sequence of Events during Crystal Growth