Synthesis of Y–Fe–O ultrafine particles using inductively coupled plasma

Sugasawa, Masami; Kikukawa, Nobuyuki; Ishikawa, Nobuhiro; Kayano, Naoyuki; Kimura, Takayasu

doi:10.1016/s0021-8502(97)00463-1

Cited by 15 publications

(8 citation statements)

References 6 publications

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“…This method enables particle injection at high rate and large diameter. Argon/oxygen RF thermal plasmas have been used for preparation of Al 2 O 3 particles (Mitsuhashi et al, 1989), TiO 2 particles (Okuyama et al, 1999) and Y-Fe-O particles (Sugasawa et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Nucleation and Growth of Oxide Nanoparticles Prepared by Induction Thermal Plasmas

Watanabe

Fujiwara

2004

Chemical Engineering Communications

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The reactive evaporation method of injected metal powders was investigated for preparing oxide nanoparticles. The method has advantages such as evaporation is enhancement of the injected powder owing to exothermic reaction heat of the metal powder oxidation in induction thermal plasmas. Tangential gas flow injection to the plasma tail flame controls the diameter and the yield of the oxide nanoparticles. The purpose of this research is to investigate the effect of the injection gas flow on the preparation mechanism of oxide nanoparticles in thermal plasmas by experimental work and numerical analysis. An increase in the flow rate of the injection gas leads to an increase in the diameter as well as the yield of the prepared nanoparticles. Numerical analysis for nucleation and growth provides the preparation mechanism of the oxide nanoparticles; however, a more sophisticated model should be developed.

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Section: Introductionmentioning

confidence: 99%

Nucleation and Growth of Oxide Nanoparticles Prepared by Induction Thermal Plasmas

Watanabe

Fujiwara

2004

Chemical Engineering Communications

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“…Both powders and deposits/melts were analyzed. In addition to the dc plasma reactor, an RF plasma reactor, described in detail elsewhere [32], was used [ Fig. 1(b)].…”

Section: Methodsmentioning

confidence: 99%

Thermal plasma in-flight treatment of electroplating sludge

Ramachandran

Kikukawa

2002

IEEE Trans. Plasma Sci.

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The thermal plasma inflight processing of electroplating sludge was investigated. Elimination of the heavy metals chromium, nickel, copper, and zinc from the sludge and conversion of the residual sludge into inert slag were achieved. The thermal plasma inflight treatment of the sludge was accomplished with various plasma gas compositions and different specific energies. Heavy metals in the form of ferrite/chromite [(Ni, Zn, Fe)(Fe, Cr) 2 O 4 ] were identified by X-ray diffraction. DC plasma experiments revealed that N 2 -O 2 plasma yielded the highest elimination rate of heavy metals for the given experimental conditions. The influence of the heat transfer rate on the elimination rate of heavy metals was investigated by comparing results from dc and RF plasma experiments. Except for Ni, leaching of heavy metals from deposits prepared by H 2 plasma treatment was minimal.

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“…11 Inductively coupled radio frequency (rf) plasma spraying, as one of the physical processing methods, has been used in a variety of industries to synthesize metal, alloy, ceramic, and composite nanoparticles. 12,13 It has advantages such as high temperature and high enthalpy density, flexibility in pressure and atmosphere, and minimum contamination. However, there are still a few challenges to overcome.…”

Section: Introductionmentioning

confidence: 99%

Solvent and plasma gas influence on the synthesis of Y₂O₃ nanoparticles by suspension plasma spraying

et al. 2007

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Suspension plasma spraying was used to synthesize Y2O3 nanoparticles. The Y2O3 starting material was first dispersed in a solvent to form a suspension and then injected axially into the plume of an inductive radio frequency plasma. It was found that the as-sprayed Y2O3 particles had a size distribution from nano to micron scale and various morphological features, which varied with processing conditions as well as solvent and plasma gas type. In comparison with water, organic solvents led to a higher productivity and smaller particle size, whereas water introduced impurities such as Y2O2C2, which is isotypic to La2O2C2. Introduction of oxygen as an auxiliary plasma gas was an effective way to eliminate this impurity. In addition, complete combustion of the organic solvent and recombination of oxygen atoms above 4000 K also elevated the heat treatment degree of Y2O3. As a result, application of O2 with an organic solvent resulted in an even smaller mean particle size and narrower size distribution.

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Synthesis of Y–Fe–O ultrafine particles using inductively coupled plasma

Cited by 15 publications

References 6 publications

Nucleation and Growth of Oxide Nanoparticles Prepared by Induction Thermal Plasmas

Nucleation and Growth of Oxide Nanoparticles Prepared by Induction Thermal Plasmas

Thermal plasma in-flight treatment of electroplating sludge

Solvent and plasma gas influence on the synthesis of Y₂O₃ nanoparticles by suspension plasma spraying

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Synthesis of Y–Fe–O ultrafine particles using inductively coupled plasma

Cited by 15 publications

References 6 publications

Nucleation and Growth of Oxide Nanoparticles Prepared by Induction Thermal Plasmas

Nucleation and Growth of Oxide Nanoparticles Prepared by Induction Thermal Plasmas

Thermal plasma in-flight treatment of electroplating sludge

Solvent and plasma gas influence on the synthesis of Y2O3 nanoparticles by suspension plasma spraying

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Product

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Solvent and plasma gas influence on the synthesis of Y₂O₃ nanoparticles by suspension plasma spraying