Dosing of oxygen concentrations by electrochemical method on superionics

The aim of this article is to analytically examine the specific physical characteristics of high-temperature ceramic solid oxide superionic conductors, using the case study of an oxygen pump crafted from stabilized zirconium dioxide. By scrutinizing the basic axial cross-section of the superionic tube, considering geometric parameters like length, thickness, and tube diameter, an equation has been derived. This equation establishes a connection among all controllable variables of the oxygen pump across the entire range of oxygen dosage. It aids in selecting the device’s geometric dimensions and optimal ratios for controllable parameters. The derivation of this equation for the pumping section of an oxygen pump is based on several assumptions, akin to those for an idealized oxygen pump. The volt-ampere characteristic of the oxygen pump is explored in the realm of deep pumping, linked to the emergence of electronic conductivity in the ceramics of the pumping section. This phenomenon may lead to the pump’s destruction, electrochemical aging, or degradation. It is asserted that the volt-ampere characteristic is the sole informative curve for assessing the proper operation mode of the superionic pump and preventing the onset of electrochemical degradation. When formulating a research method and defining tasks for a ceramic oxide superionic conductor, several assumptions were considered, mirroring those for an idealized electrolyte. The examined solid oxide superionic conductor or solid electrolyte is a ceramic material shaped as tubes, test tubes, or tablets. These initially contain impurity cations of lower valence, such as calcium, yttrium, and scandium, in comparison to zirconium. These impurity cations are responsible for the presence of vacancies or holes in the solid cubic structure of zirconium dioxide. Through these vacancies, only oxygen anions are transported under the influence of external factors, high temperature, and a direct current electric field. The research methodology relies on measuring the electromotive force recorded at the air/electrode/superionic boundary section, which is mathematically linked to the oxygen concentration in the air stream. Mathematical formulas are provided for calculating the desired oxygen concentration based on various external conditions. Theoretical conclusions and justifications regarding the potential utilization of phenomenological transport properties of a superionic conductor in production conditions are pres