Controlled synthesis and growth mechanism of Bi2O3/YSZ solid electrolyte materials

Luan, Junpeng; Zhang, Jingde; Yao, Xiaomei; Li, Fēi; Jia, Baoxin

doi:10.1016/j.ceramint.2016.07.160

Cited by 5 publications

(6 citation statements)

References 27 publications

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“…37,41 Broadening of the size distribution as a result of stopping the growth process in the Ostwald ripening stage 44 can be achieved because the smaller particles are swallowed by the larger ones. 45,46 As a consequence, the span, as a measure of the size distribution, was higher than that of the rest of the samples when the H 2 O 2 addition rate was 0.29 ml min À1 . With the reactant addition rate increasing to 0.58 ml min À1 , higher local supersaturation and higher reagent concentration in the solution induced conditions in which the particles underwent diffusion-controlled growth.…”

Section: Particle Size Distributionmentioning

confidence: 95%

Controlled chemical synthesis of CaO₂ particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

2018

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Section: Particle Size Distributionmentioning

confidence: 95%

Controlled chemical synthesis of CaO₂ particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

2018

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“…In addition, the melting point of Bi 2 O 3 , which is commonly used as a liquid-phase-assisted sintering additive for YSZ to enhance its overall performance, is around 825 °C [ 19 , 20 ]. By mechanically mixing Bi 2 O 3 with YSZ or synthesizing Bi 2 O 3 -doped YSZ composite powders, our group and other researchers have demonstrated its effectiveness in lowering the sintering temperature of YSZ electrolytes [ 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Bi2O3–YSZ and YSB–YSZ Composite Powders by a Microemulsion Method and Their Performance as Electrolytes in a Solid Oxide Fuel Cell

et al. 2023

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Bi2O3 is a promising sintering additive for YSZ that not only decreases its sintering temperature but also increases its ionic conductivity. However, Bi2O3 preferably grows into large-sized rods. Moreover, the addition of Bi2O3 induces phase instability of YSZ and the precipitation of monoclinic ZrO2, which is unfavorable for the electrical property. In order to precisely control the morphology and size of Bi2O3, a microemulsion method was introduced. Spherical Bi2O3 nanoparticles were obtained from the formation of microemulsion bubbles at the water–oil interface due to the interaction between the two surfactants. Nanosized Bi2O3–YSZ composite powders with good mixing uniformity dramatically decreased the sintering temperature of YSZ to 1000 °C. Y2O3-stabilized Bi2O3 (YSB)–YSZ composite powders were also fabricated, which did not affect the phase of YSZ but decreased its sintering temperature. Meanwhile, the oxygen vacancy concentration further increased to 64.9% of the total oxygen with the addition of 5 mol% YSB. In addition, its ionic conductivity reached 0.027 S·cm−1 at 800 °C, one order of magnitude higher than that of YSZ. This work provides a new strategy to simultaneously decrease the sintering temperature, stabilize the phase and increase the conductivity of YSZ electrolytes.

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“…Addition of 3 mol% Bi 2 O 3 by mechanical mixing, YSZ ceramics could be sintered at a temperature of 1000°C with a relative density up to 96.5% 13 . Bi 2 O 3 /YSZ composite powders were also synthesized by chemical co‐precipitation method 14 . One‐dimensional rod‐like α‐Bi 2 O 3 particles mixed with YSZ powders were obtained through calcination at 400°C for 6 h. However, the large sized rod α‐Bi 2 O 3 up to around 10 μm decreased its advantage as compared to mechanical mixing.…”

Section: Introductionmentioning

confidence: 99%

“…13 Bi 2 O 3 /YSZ composite powders were also synthesized by chemical co-precipitation method. 14 One-dimensional rod-like α-Bi 2 O 3 particles mixed with YSZ powders were obtained through calcination at 400 • C for 6 h. However, the large sized rod α-Bi 2 O 3 up to around 10 μm decreased its advantage as compared to mechanical mixing.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of γ‐Bi ₂ O ₃ /YSZ composite powders using a facile precipitation method

Tian

Jia

Zhang

et al. 2022

Int J Applied Ceramic Tech

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Low melting point and high ionic conductivity of γ-Bi 2 O 3 make it a promising additive to decrease the sintering and operation temperatures of yttria stabilized zirconia (YSZ)-based electrolyte for solid oxide fuel cell application. Herein, γ-Bi 2 O 3 /YSZ composite powders with good uniformity and precise control of morphology and phase were successfully synthesized via a low cost chemical precipitation method. Both the concentration of NaOH solution and the reactant adding sequence affect the morphology and synthesis of γ-Bi 2 O 3 /YSZ composite powders. When the concentration of NaOH was in the range of 1.25-1.875 M, tetrahedron γ-Bi 2 O 3 /YSZ powders were synthesized. While, cubic structural γ-Bi 2 O 3 /YSZ powders were obtained when adding Bi 3+ and YSZ suspension into 1.5 M NaOH solution. The addition of YSZ facilitates the fabrication of γ-Bi 2 O 3 and widens its process window to a higher NaOH concentration. Thus synthesized γ-Bi 2 O 3 /YSZ composite powders effectively decrease the sintering temperature of YSZ to 1050 • C due to the uniform distribution of γ-Bi 2 O 3 inside YSZ powders. This work provides a facile method to fabricate γ-Bi 2 O 3 /YSZ composite powder with controlled morphology and phase, which will promote the mass production of low cost YSZ-based electrolyte for SOFC applications.

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Controlled synthesis and growth mechanism of Bi2O3/YSZ solid electrolyte materials

Cited by 5 publications

References 27 publications

Controlled chemical synthesis of CaO₂ particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

Controlled chemical synthesis of CaO₂ particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

Preparation of Bi2O3–YSZ and YSB–YSZ Composite Powders by a Microemulsion Method and Their Performance as Electrolytes in a Solid Oxide Fuel Cell

Synthesis of γ‐Bi ₂ O ₃ /YSZ composite powders using a facile precipitation method

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Controlled synthesis and growth mechanism of Bi2O3/YSZ solid electrolyte materials

Cited by 5 publications

References 27 publications

Controlled chemical synthesis of CaO2 particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

Controlled chemical synthesis of CaO2 particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

Preparation of Bi2O3–YSZ and YSB–YSZ Composite Powders by a Microemulsion Method and Their Performance as Electrolytes in a Solid Oxide Fuel Cell

Synthesis of γ‐Bi 2 O 3 /YSZ composite powders using a facile precipitation method

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Controlled chemical synthesis of CaO₂ particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

Controlled chemical synthesis of CaO₂ particles coated with polyethylene glycol: characterization of crystallite size and oxygen release kinetics

Synthesis of γ‐Bi ₂ O ₃ /YSZ composite powders using a facile precipitation method