Application of solid electrochemical sulfur sensor in the liquid iron

Wen, Tianpeng; Yu, Jie‐Hui; Jin, Endong; Liu, Tao; Hou, Xinghui; Sun, Qiaoyang

doi:10.1016/j.snb.2018.09.124

Cited by 22 publications

(6 citation statements)

References 13 publications

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“…The ionic conductivity of the bilayer structure in this study was hundreds of times, even thousands of times, the required conductivity, which could meet the required ionic conductivity of ionic conductor for solid electrolyte sulfur sensor. For this bilayer structure, the CaS would be formed on the side of the laser cladding layer when inserting the liquid iron according to the reaction (1), which has been proved experimentally in previous studies [15]. Thus, the synthesized CaS could be used as the auxiliary electrode in company with the residual CaAl2O4 and CaAl4O7 phases in the laser cladding layer.…”

Section: Detection and Analysismentioning

confidence: 63%

“…where K is the equilibrium constant, a [S] and a [O] are the activities of [S] and [O] in the liquid iron, respectively, ln a CaS a CaO does not change with the sulfur content and it can be considered to be a constant value. Wen et al [15] have analyzed the relationship between the CaS and CaO incorporated in CaAl 2 O 4 and CaAl 4 O 7 in liquid iron, and found that a [O] was very low in the carbon-saturated liquid iron. It should be noted that the effect of other elements in molten iron on reaction (1) should be eliminated for ensure its occurrence, such as the element P. Therefore, the purity of liquid iron for testing should be high, and the trace elements such as P and Si elements containing in the liquid iron should be less and would not have any effect on the reaction (1) in this stage.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of ZrO2(MgO)/CaAl2O4+CaAl4O7 Bilayer Structure Used for Sulfur Sensor by Laser Cladding

Wen

Jin

et al. 2019

Applied Sciences

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The ZrO2(MgO)/CaAl2O4+CaAl4O7 bilayer structure used for sulfur sensor was fabricated by the laser powder cladding (LPC) method using the MgO partially stabilized zirconia (2.7 wt% MgO-PSZ) as the substrate and the CaAl2O4 + CaAl4O7 composites as the coating material. The microstructure, phase composition and ionic conductivity of this bilayer structure were investigated for better application in the sulfur determination. The results indicated that the structure of the coating was dense and well-distributed with a thickness of 100 μm. The ionic conductivity of the ZrO2(MgO)/CaAl2O4+CaAl4O7 bilayer structure was up to 2.06 × 10−3 S·cm−1 at 850 °C that met the required ionic conductivity of ionic conductor for solid electrolyte sulfur sensor. Furthermore, the sulfur sensor Mo|Cr+Cr2O3| ZrO2(MgO)| CaAl2O4+CaAl4O7|[S]Fe| Mo was assembled used this bilayer structure and tested in carbon-saturated liquid iron at 1773 K and 1823 K. The stability and reproducibility of the sulfur sensor were satisfactory and could be used for sulfur determination in the liquid iron.

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Section: Detection and Analysismentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Fabrication of ZrO2(MgO)/CaAl2O4+CaAl4O7 Bilayer Structure Used for Sulfur Sensor by Laser Cladding

Wen

Jin

et al. 2019

Applied Sciences

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“…Also, the species B now undergoes spontaneous reaction within the metal solvent. A recent work [63] proposed to use calcium aluminate instead of b-alumina, using the oxygen concentration at equilibrium with the oxide membrane after the equilibrium reaction of Ca 2þ with S to form CaS. Superprotonic membranes (for example CaZrO 3 ; codoped with Al 2 O 3 and In 2 O 3 ), i.e., that enable transport of the proton, have been put forth to probe the hydrogen (H) content in copper [33,64] or aluminium.…”

Section: Solid-state Electrolytesmentioning

confidence: 99%

Electrochemical Methods for the Study of Liquid Metals: Highlights from Metallurgical Transactions

Allanore

2021

Metall Mater Trans B

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Metallurgical Transactions-and its subsequent MMTA and MMTB-has been a home for numerous contributions related to electrochemistry as it applies to solid, but also liquid materials. Herein, a perspective is presented to highlight the utility of electrochemical methods as applied to the study of liquid metals. The review of a subset of papers shows the diversity of experimental options available to investigate the thermodynamic properties of liquid metals, as well as certain limitations. A specific set of results covering the entire range of two liquid binary systems is reviewed as an illustration of the static electrochemical potential difference method. More recent developments offered by dynamic electrochemical potential methods, using direct and alternating currents or containerless configurations, are reviewed. Advances in electrochemical studies of liquid metals bring the prospect of simultaneous thermodynamic and transport properties measurements closer to reality.

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“…Moreover, they also have very desirable infrared transmission properties for optical fibre applications [7,8]. The author's previous research shows that the calcium aluminate compounds can be used as the coating materials deposited on the surface of the solid electrolyte to form the structure of solid electrolyte/calcium aluminate [9][10][11]. The CaS auxiliary electrode was synthesized on the side of calcium aluminate coating when inserted in the molten iron, which provides a new research route for preparation of this sulphur sensor [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of calcium aluminate powders by ethanol thermal decomposition method

Wen

Yao

Tian

et al. 2021

PAC

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The aim of this work was the synthesis of calcium aluminate powders at a relatively low temperature via the ethanol thermal decomposition method. The effect of the cation concentration in the ethanol solution and CaO contents incorporated in calcium aluminate materials on the structure of the prepared calcium aluminate powders in terms of phase composition, particle size distribution and specific surface area were investigated. It was demonstrated that the prepared powders containing 40 wt.% of CaO were mainly composed of CaAl2O4 and CaAl4O7 phases, while Ca3Al2O6 and Ca12Al14O33 became the major phases accompanied with free CaO mesophase when the CaO content increased to 60wt.%. A decrease in the particle size was observed for both types of calcium aluminate powders with the decrease of the cation concentration and CaO contents, while the specific surface area increased. The research results provide an optional process for the preparation of calcium aluminate materials, playing an important role in simplifying the production process and shortening the production time.

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Application of solid electrochemical sulfur sensor in the liquid iron

Cited by 22 publications

References 13 publications

Fabrication of ZrO2(MgO)/CaAl2O4+CaAl4O7 Bilayer Structure Used for Sulfur Sensor by Laser Cladding

Fabrication of ZrO2(MgO)/CaAl2O4+CaAl4O7 Bilayer Structure Used for Sulfur Sensor by Laser Cladding

Electrochemical Methods for the Study of Liquid Metals: Highlights from Metallurgical Transactions

Synthesis of calcium aluminate powders by ethanol thermal decomposition method

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