Resistive Oxygen Gas Sensors for Harsh Environments

Abstract

Resistive oxygen sensors are an inexpensive alternative to the classical potentiometric zirconia oxygen sensor, especially for use in harsh environments and at temperatures of several hundred °C or even higher. This device-oriented paper gives a historical overview on the development of these sensor materials. It focuses especially on approaches to obtain a temperature independent behavior. It is shown that although in the past 40 years there have always been several research groups working concurrently with resistive oxygen sensors, novel ideas continue to emerge today with respect to improvements of the sensor response time, the temperature dependence, the long-term stability or the manufacture of the devices themselves using novel techniques for the sensitive films. Materials that are the focus of this review are metal oxides; especially titania, titanates, and ceria-based formulations.

Synthesis of ZnGa2O4 assisted by high-energy ball milling and its gas-sensing characteristics

“…Sensors for toxic and flammable gases have attracted much attention due to the growing concern about environmental protection and safety [1][2][3][4]. Metal-oxide semiconductors (MOS) such as In 2 O 3 [5,6], WO 3 [7,8], and SnO 2 [9][10][11] have been widely chosen as sensing materials in the last decades for their high sensitivity to target gases and simplicity in fabrication.…”

Defect mechanisms of coloration in Fe-doped SrTiO3 from first principles

“…[1][2][3][4][5] There is a growing research focus on this material for applications in thin-film capacitors, resistive random access memory, gas sensing, and high electron mobility two dimensional electron gas heterostructures. [6][7][8][9] It is also commonly used as a growth substrate for superconductors and other oxide thin films. 7,10 Ceramic single-crystal STO, commonly used for dielectric applications, has a significant number of background impurities present at levels of parts per million or higher.…”

One-step synthesis of 3D flower-like Zn2SnO4 hierarchical nanostructures and their gas sensing properties

“…Semiconductor metal oxide-based gas sensors, used as a low cost alternative for gas detection devices, have attracted much attention because of their importance in maintaining and controlling air quality in various atmospheres [1][2][3]. However, they suffered from limitations in sensitivity and selectivity compared to more expensive alternatives.…”