Development of a novel combustion synthesis method for synthesizing of ceramic oxide powders

Hwang, Chyi‐Ching; Wu, Tsung-Yung; Wan, Jun; Tsai, Jih-Sheng

doi:10.1016/j.mseb.2004.03.023

Cited by 165 publications

(70 citation statements)

References 15 publications

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“…The presence of a signal at 895 °C is indicative of the formation of other species in addition to the Mn3O4, Co3O4 and Mn3-xCoxO4 phases found by XRD for these solids (cobalt aluminates). The signal at 680 °C in the ACCoMn solid indicates the presence of Mn species with significant interactions in the solid solution or MnAl2O4-type spinels that are generated because of the high temperatures that can be reached in the auto-combustion process (1400-1600 °C) [44], which decreases the oxygen mobility inside the material. This signal is not present in the CPCoMn oxide.…”

Section: Redox Properties and Oxygen Mobilitymentioning

confidence: 99%

“…In the case of the ACCoMn oxide, the elevated synthesis temperatures favor fusion and coalescence processes in the metals [44], provoking the formation of species with strong interactions that decrease their mobility. Thus, the presence of oxygen vacancies is the determining factor for oxygen mobility, and such mobility increases when the strength of the M-O bond decreases.…”

Section: Redox Properties and Oxygen Mobilitymentioning

confidence: 99%

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Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

2015

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Co-Mn-Mg-Al oxides were synthesized using auto-combustion and co-precipitation techniques. Constant ratios were maintained with (Co + Mn + Mg)/Al equal to 3.0, (Co + Mn)/Mg equal to 1.0 and Co/Mn equal to 0.5. The chemical and structural composition, redox properties, oxygen storage capacity and oxygen mobility were analyzed using X-ray fluorescence (XRF), X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), temperature-programmed reduction of hydrogen (H2-TPR), oxygen storage capacity (OSC), oxygen storage complete capacity (OSCC) and isotopic exchange, respectively. The catalytic behavior of the oxides was evaluated in the total oxidation of a mixture of 250 ppm toluene and 250 ppm 2-propanol. The synthesis methodology affected the crystallite size, redox properties, OSC and oxide oxygen mobility, which determined the catalytic behavior. The co-precipitation method got the most active oxide in the oxidation of the volatile organic compound (VOC) mixture because of the improved mobility of oxygen and ability to favor redox processes in the material structure.

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Section: Redox Properties and Oxygen Mobilitymentioning

confidence: 99%

Section: Redox Properties and Oxygen Mobilitymentioning

confidence: 99%

Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

2015

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“…The average particle size decreases and the specic surface area increases with increasing glycine amount in the starting composition. GNP is a simple and cost-eective method with less labor which enable very high production rates [8,9]. These advantages of GNP process are due to some characteristics which can be summarized as ne crystalline powders with easily broken agglomerates, nanometer scale particle size, high chemical homogeneity, milling with no need for crashing, no impurities from milling process, narrow range powder size distribution.…”

Section: Properties Of Ceria Based Novel Anode Nanopowdersmentioning

confidence: 99%

Properties of Ceria Based Novel Anode Nanopowders Synthesized by Glycine-Nitrate Process

Yıldız¹,

Soydan²,

Ata³

et al. 2013

Acta Phys. Pol. A

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Novel anode nanopowder materials consisting of ceria-based components synthesized by glycinenitrate process were investigated for solid oxide fuel cells. Glycinenitrate process involves a self-combustion reaction at 220• C of water-based nitrate and glycine solutions which subsequently can reach up to 1200• C. The resulting morphology, the size of particles and the formation of crystalline phases were characterized by dierential scanning calorimetry, X-ray diraction, transmission electron microscopy, scanning electron microscopy, the BrunauerEmmettTeller method and Nanosizer. It was determined that dopants in ceria such as Co, Ni, Cu, V and Fe had signicant eect on the morphology and size. The size distribution measured by Nanosizer was 50600 nm, transmission electron microscopy, 5200 nm and the BrunauerEmmettTeller method 100120 nm and specic surface area of powders in the range 67.4572.05 m 2 g −1 as measured by the BrunauerEmmettTeller method. Particles were observed to have spherical structures for Cu and Fe doped powders and rod-shaped in a porous tu microstructure for those doped with Co and Ni. Vanadium doping helped to decrease the porosity and initiated the process of spheroidization of particles.

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“…This internal rapid heating allows a reduction of processing time and energy. The reaction rate is enhanced by one to two orders of magnitude [6][7][8][9]. The use of microwave energy as heating sources for the combustion reaction has many advantages such as fast reaction kinetic, cleanness and efficiency as well as economical and ecological aspects of the process due to the costs reduction in terms of energy and time [10].…”

Section: Introductionmentioning

confidence: 99%

Novel Route to Prepare Magnetic Material Co₃V₂O₈and Structural Characterization

2012

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Co 3 V 2 O 8 is a member of kagomé staircase oxides, represented by general formula M 3 V 2 O 8 (M = Ni, Co, Mn). It attracted great attention due to strong magnetic anisotropy, magnetic phase transition, genuine macroscopic quantum effects, strong quantum fluctuations, low-temperature ferroelectricity, field-induced magnetic transitions, complicated phase diagram and displays long-range magnetic order because of geometrical frustration. Different routes to prepare the frustrated magnetic material was reported such as floating zone technique and conventional high temperature method. Co 3 V 2 O 8 (International Centre for Diffraction Data (ICDD): 16-675) was synthesized with Co 3 O 4 (ICDD: 80-1536) as binary phase by microwave assisted preparation using Co(NO 3 ) 2 ·6H 2 O and NH 4 VO 3 . The synthesized material was characterization by powder X-ray diffraction, the Fourier transform infrared spectroscopy, and thermogravimetric-differential thermal analysis.

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Development of a novel combustion synthesis method for synthesizing of ceramic oxide powders

Cited by 165 publications

References 15 publications

Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

Properties of Ceria Based Novel Anode Nanopowders Synthesized by Glycine-Nitrate Process

Novel Route to Prepare Magnetic Material Co₃V₂O₈and Structural Characterization

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Development of a novel combustion synthesis method for synthesizing of ceramic oxide powders

Cited by 165 publications

References 15 publications

Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

Oxygen Storage Capacity and Oxygen Mobility of Co-Mn-Mg-Al Mixed Oxides and Their Relation in the VOC Oxidation Reaction

Properties of Ceria Based Novel Anode Nanopowders Synthesized by Glycine-Nitrate Process

Novel Route to Prepare Magnetic Material Co3V2O8and Structural Characterization

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Novel Route to Prepare Magnetic Material Co₃V₂O₈and Structural Characterization