Synthesis of γ‐Bi2O3/YSZ composite powders using a facile precipitation method. Issue 5 (15th April 2022)

• Record Type: Journal Article
• Authors: Tian, YuHang; Jia, Baoxin; Zhang, Xu; Xiao, Shikang; Li, Jianzhang; Liu, Shuangshuang; Min, Guanghui; Han, Guifang; Li, Aijun; Zhang, Jingde
• Is Part Of: International journal of applied ceramic technology. Volume 19:Issue 5(2022)
• Page Start: 2399
• Page End: 2405
• Publication Date: 2022-04-15
• Subjects: composite powder -- electrolyte material -- SOFC -- YSZ -- γ‐Bi2O3; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.14065
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: Low melting point and high ionic conductivity of γ‐Bi2 O3 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‐Bi2 O3 /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‐Bi2 O3 /YSZ composite powders. When the concentration of NaOH was in the range of 1.25–1.875 M, tetrahedron γ‐Bi2 O3 /YSZ powders were synthesized. While, cubic structural γ‐Bi2 O3 /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‐Bi2 O3 and widens its process window to a higher NaOH concentration. Thus synthesized γ‐Bi2 O3 /YSZ composite powders effectively decrease the sintering temperature of YSZ to 1050°C due to the uniform distribution of γ‐Bi2 O3 inside YSZ powders. This work provides a facile method to fabricate γ‐Bi2 O3 /YSZ composite powder with controlled morphology and phase, which will promote the mass production of low cost YSZ‐based electrolyte for SOFC applications.