The effect of Fe doping on the electrical conductivities of CaZrO3 and its sensing performance in limiting current oxygen sensor

A limiting Current Oxygen Sensor Constituted of (CeO2)0.95(Y2O3)0.05 as Solid Electrolyte Layer and (CeO2)0.75(ZrO2)0.25 as Dense Diffusion Barrier Layer

“…By comparison, we find that the limiting current value of the oxygen sensor in Reference [27] decreases with the increase of test time, which may be due to the increase of polarization resistance. Furthermore, in Reference [27], the applied voltage is 0–2.5 V, while in this paper, it is 0–1.5 V. The decrease of the applied voltage is beneficial to the service life of the oxygen sensor, which is also the reason for the smaller reduction of the limiting current. Further research is needed on the specific reasons for the reduction of the limiting current value.…”

“…So far, the LSGM-based dense diffusion barrier layer limiting current oxygen sensors with the best sensing performances has not studied the effects of water vapor pressure on the sensing performance of the sensor [10,15,24]. However, in my previous researches, such as in References [27,28], the sensing performance of the dense diffusion barrier limiting current oxygen sensor is not affected by water vapor pressure, because the dense diffusion barrier is oxygen–ion conductive.…”

Electrostrictive Effect of Materials under High Pressure Revealed by Electrochemical Impedance Spectroscopy

“…CaZrO 3 is a typical electrostrictive material. It has a large anisotropic dielectric tensor, and shows wide applications in solid electrolytes, − sensors, − refractories, and hydration-resistant materials . At high pressures, theoretical research on CaZrO 3 mainly focuses on first-principles calculations of structure, energy stability, and electronic and lattice dynamics properties. − Experimentally, the structures of CaZrO 3 under high pressures have been investigated by synchrotron radiation X-ray diffraction measurements, and it has been confirmed that the orthorhombic phase of CaZrO 3 can be stable up to 30 GPa. , In this paper, we will reveal the pressure dependence of electrostriction of CaZrO 3 from the analysis of electrochemical impedance spectra.…”