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    • Synthesis of Γ‐bi 2 O 3 /YSZ Composite Powders Using a Facile Precipitation Method

    YuHang Tian,Baoxin Jia,Xu Zhang,Shikang Xiao,Jianzhang Li,Shuangshuang Liu,Guanghui Min,Guifang Han,Aijun Li,Jingde Zhang

    International Journal of Applied Ceramic Technology（2022）

    Shandong Univ

    Cited 3|Views2
    Abstract
    Low melting point and high ionic conductivity of gamma-Bi2O3 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, gamma-Bi2O3/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 gamma-Bi2O3/YSZ composite powders. When the concentration of NaOH was in the range of 1.25-1.875 M, tetrahedron gamma-Bi2O3/YSZ powders were synthesized. While, cubic structural gamma-Bi2O3/YSZ powders were obtained when adding Bi3+ and YSZ suspension into 1.5 M NaOH solution. The addition of YSZ facilitates the fabrication of gamma-Bi2O3 and widens its process window to a higher NaOH concentration. Thus synthesized gamma-Bi2O3/YSZ composite powders effectively decrease the sintering temperature of YSZ to 1050 degrees C due to the uniform distribution of gamma-Bi2O3 inside YSZ powders. This work provides a facile method to fabricate gamma-Bi2O3/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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    Key words
    composite powder,electrolyte material,SOFC,YSZ,gamma-Bi2O3
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