Phase Equilibria at Liquidus Temperatures in the System Cobalt Oxide-Iron Oxide-Silica in Air

Massé, Diomande; Muan, Arnulf

doi:10.1111/j.1151-2916.1965.tb14800.x

Cited by 28 publications

(14 citation statements)

References 2 publications

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“…The calculated two-liquid region (liquid miscibility gap) in Fig. 7 is significantly narrower than indicated by the experimental measurements [17,32]. However, it is very difficult to reproduce the experimental points for the two-liquid region since this would require an opposite curvature of the SiO 2 -liquidus isotherms.…”

Section: Coo -Sio 2 Systemmentioning

confidence: 75%

“…The agreement is within experimental error limits. Several calculated phase diagrams sections of the CoO -Fe 3 O 4 -SiO 2 system in air are compared with experimental results [17,32] in Fig. 8.…”

Section: Coo -Sio 2 Systemmentioning

confidence: 97%

“…[22,23] and (b) calculated equilibrium oxygen partial pressure of (Co 2 SiO 4 + Co + SiO 2 ) threephase assemblage and experimental data [25 -29]. Muan [17,32] which are also plotted on Fig. 7.…”

Section: Coo -Sio 2 Systemmentioning

confidence: 99%

“…The first tentative phase diagram of the CoO -SiO 2 binary system was reported by Asanti and Kohlmeyer [16], but no phase identification was carried out. Later, Masse and Muan [17] performed a more comprehensive phase diagram study in air using a classical quenching technique followed by optical microscopy and X-ray diffraction phase analysis. value of 2700 8C.…”

Section: Evaluation/optimization From Experimental Datamentioning

confidence: 99%

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Thermodynamic modeling of the CoO–SiO₂and CoO–FeO–Fe₂O₃–SiO₂systems

Jung

Decterov

Pelton

2007

International Journal of Materials Research

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A complete critical evaluation and thermodynamic modeling of the phase diagrams and thermodynamic properties of oxide phases in the CoO -FeO -Fe 2 O 3 -SiO 2 system at 1 bar total pressure are presented. Optimized equations for the thermodynamic properties of all phases were obtained which reproduce all available thermodynamic and phase equilibrium data within the limits of absolute experimental accuracy from 25 8C to above the liquidus temperatures at all compositions and oxygen partial pressures. The database of the model parameters can be used, along with software for Gibbs energy minimization, to calculate any type of phase diagram section. Unexplored phase diagram sections and activities of CoO, FeO and SiO 2 in this system of industrial importance are predicted from the thermodynamic models with the optimized parameters.

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Section: Coo -Sio 2 Systemmentioning

confidence: 75%

Section: Coo -Sio 2 Systemmentioning

confidence: 97%

Section: Coo -Sio 2 Systemmentioning

confidence: 99%

Section: Evaluation/optimization From Experimental Datamentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamic modeling of the CoO–SiO₂and CoO–FeO–Fe₂O₃–SiO₂systems

Jung

Decterov

Pelton

2007

International Journal of Materials Research

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“…A phase diagram of a CoFe 2 O 4 Co 3 O 4 system, has been reported by Robin,82) Masse and Muan. 83) They found a miscibility gap (spinodal curve) in the spinel region. The phase diagram was revised; and the kinetics of spinodal decomposition was examined by Takahashi et al 84)87) In their work, the samples were aged for from 200 h to 36 days at 500700°C.…”

Section: Magnetic Field Induced Phase Separationmentioning

confidence: 99%

Progress and impact of magnetic field application during pulsed laser deposition (PLD) on ceramic thin films

Wakiya

Kawaguchi

Sakamoto

et al. 2017

J. Ceram. Soc. Japan

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When a focused laser beam is irradiated onto a target, electrons and cations are emitted from the target to form a plume (plasma). This phenomenon is referred to as laser ablation (LA). The thin film deposition method using laser ablation is referred to as pulsed laser deposition (PLD). Recombination of electrons and cations usually occurs in the plume before they arrive at a substrate to form a thin film. However, previous reports show that applying a magnetic field to the plume suppresses recombination and enhances electron-impact excitation. The flux of electrons and cations can therefore be controlled by an external magnetic field during PLD. Charged cations can separate from neutral particles or heavy clusters such as droplets. This principle has been used to obtain droplet-free thin films. Applying a magnetic field to the plume also causes ohmic heating and suppression of adiabatic expansion. The electron temperature in a plume with magnetic field application is therefore higher than that in a plume without magnetic field application. This principle has been used to lower crystallization temperatures, improve crystallinity, and enhance thin film properties. Because application of a magnetic field suppresses recombination and enhances electron-impact excitation, several cations exist in the plume. These then rush to the substrates. This principle produces changes the growth mode, which in turn brings about changes in the thin film morphology. Furthermore, this principle leads to phase separation control. The impingement of cations reportedly brings about lowering of the activation energy for diffusion, which leads to phase separation by spinodal decomposition. A thin film with a spontaneous superlattice structure forms when compositional wave propagation occurs in one direction, but when a cross-linked microstructure is obtained the compositional wave direction of propagation is random. This review presents the influence of application of a magnetic field during deposition.©2017 The Ceramic Society of Japan. All rights reserved.Key-words : PLD, Effect of magnetic field, Magnetic field-induced phase separation [Received July 29, 2017; Accepted September 23, 2017] 1. General theory of the effects of application of a magnetic field to the plume When a focused laser beam is irradiated onto the surface of a solid (or liquid), the substances on the surface evolve explosively to form a plume (plasma). Electrons and cations as well as neutral atoms or molecules and their clusters are included in the plume (plasma). This phenomenon is referred to as laser ablation (LA). Thin film deposition by LA is generally referred to as pulsed laser deposition (PLD), by which the vapor phase in the plume is deposited onto a substrate to form a thin film.1) The configuration of PLD is simple compared to those of physical vapor phase deposition methods such as sputtering and molecular beam deposition (MBE). It is therefore easy to install some devices for plume stimulation. In actuality, several experiments on applying an elect...

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High Coercive Field for Nanoparticles of CoFe₂O₄in Amorphous Silica Sol–Gel

et al. 2003

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Unusually high magnetic hardness, characterized by a coercive field of 2 T at 2 K, has been observed for 12 nm particles of CoFe2O4 (15%) in amorphous silica prepared by the sol–gel technique and sintered at 1000 °C. Field‐ and temperature‐dependence magnetization data (see Figure) for these particles and those of 3.2 nm suggest that dipolar interaction between particles is responsible for this enhancement.

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Phase Equilibria at Liquidus Temperatures in the System Cobalt Oxide-Iron Oxide-Silica in Air

Cited by 28 publications

References 2 publications

Thermodynamic modeling of the CoO–SiO₂and CoO–FeO–Fe₂O₃–SiO₂systems

Thermodynamic modeling of the CoO–SiO₂and CoO–FeO–Fe₂O₃–SiO₂systems

Progress and impact of magnetic field application during pulsed laser deposition (PLD) on ceramic thin films

High Coercive Field for Nanoparticles of CoFe₂O₄in Amorphous Silica Sol–Gel

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Phase Equilibria at Liquidus Temperatures in the System Cobalt Oxide-Iron Oxide-Silica in Air

Cited by 28 publications

References 2 publications

Thermodynamic modeling of the CoO–SiO2and CoO–FeO–Fe2O3–SiO2systems

Thermodynamic modeling of the CoO–SiO2and CoO–FeO–Fe2O3–SiO2systems

Progress and impact of magnetic field application during pulsed laser deposition (PLD) on ceramic thin films

High Coercive Field for Nanoparticles of CoFe2O4in Amorphous Silica Sol–Gel

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Product

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About

Thermodynamic modeling of the CoO–SiO₂and CoO–FeO–Fe₂O₃–SiO₂systems

Thermodynamic modeling of the CoO–SiO₂and CoO–FeO–Fe₂O₃–SiO₂systems

High Coercive Field for Nanoparticles of CoFe₂O₄in Amorphous Silica Sol–Gel