Journal of Advanced Ceramics

, Volume 7, Issue 1, pp 1–4 | Cite as

Bi/Bi2O3 sensor for quantitation of dissolved oxygen in molten salts

  • Huiping Zheng
  • Hongqiang Nian
  • Jinfeng Xia
  • Guohong Zhou
  • Danyu Jiang
  • Qiang Li
Open Access
Research Article


To quantify the oxygen content in molten salts, we examined the performance of an yttria-stabilized zirconia solid electrolyte oxygen sensor with a Bi/Bi2O3 reference electrode, focusing on its output accuracy. When the above sensor was tested in a flow of gas with known oxygen partial pressure, \(p_{O_2}\), a linear relationship between \(lgp_{O_2}\) and the electromotive force (EMF) was observed, and the correlation slope exhibited a positive deviation from Nernstian behavior. EMF measurements performed in molten NaCl–KCl indicated that the oxygen content of this salt mixture increased with increasing oxygen partial pressure in the covering gas, in agreement with Henry’s law. Moreover, the EMF exhibited a linear decrease with increasing melt temperature of molten NaCl–KCl, in agreement with the theoretical model. Finally, a relationship between the structure of molten NaCl–KCl and its oxygen diffusion behavior was established. As a result, the developed sensor was demonstrated to be well suited for determining the oxygen content of molten salts.


molten salt oxygen sensor Bi/Bi2O3 oxygen content 



The author thanks the Shanghai Institute of Ceramics and Chinese Academy of Sciences for support.


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© The Author(s) 2017

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Huiping Zheng
    • 1
  • Hongqiang Nian
    • 2
  • Jinfeng Xia
    • 2
  • Guohong Zhou
    • 2
  • Danyu Jiang
    • 2
  • Qiang Li
    • 1
  1. 1.East China Normal UniversityShanghaiChina
  2. 2.Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina

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