Planar type of limiting current oxygen sensor

Review—Electrochemical NOxGas Sensors Based on Stabilized Zirconia

“…69 In order to overcome this problem, a barrier is introduced, which limits the gas diffusion to the cathode. The barrier can be divided into leak aperture, 70 porous layer 71,72 and dense layer. [73][74][75][76][77] Besides oxygen, this principle can also be utilized for NO x .…”

New Method to Fabricate Limiting‐Current‐Type Oxygen Sensors

“…1,3 The limiting-current-type oxygen sensor, which uses the oxygen-pumping capability of zirconia ceramics, has several advantages over the concentration-cell-type oxygen sensor. These advantages are as follows: 2 (1) High oxygen concentrations (1%-100%) can be measured accurately.…”

“…[1][2][3][4][5][6][7][8] Over the last two decades, ceramic oxygen sensors that use stabilized-zirconia ceramics have been in fastincreasing demand, because of their good stability in a wide range of temperatures and their low fabrication cost. There are two types of zirconia oxygen sensors: the concentration-celltype sensor and the limiting-current-type sensor.…”

Calibration of the limiting current of oxygen sensors by the Fermi–Dirac distribution

“…Although the sensing principles of oxygen sensors based on Yttria‐Stabilize Zirconia ( YSZ ) and optical oxygen sensors are different , both of them have sufficient thermodynamic stability , good reversibility , high electron mobility , high electrical conductivity and high temperature durability ; therefore , very wide concentration region of oxygen is measured by them . Yttria‐Stabilize Zirconia (YSZ) is very popular in oxygen sensing devices, especially in automotive applications, because the principle of Yttria‐Stabilize Zirconia is the limiting current oxygen sensor (sometimes referred as amperometric sensor) show ing linear slope for low polarizations and limiting current at high enough applied voltage s . Due to high oxygen ‐ion concentration , low electron conductivity and high stability over wide oxygen partial pressures (in both oxidizing and reducing atmospheres) at high temperature , the oxygen sensor based on YSZ provide s a more precise detection of O 2 concentration and is extensively used for monitoring oxygen concentrations in various fields .…”