WO3-YSZ electrochemical oxygen sensor for harsh conditions
Innovative electrochemical sensor utilizing WO3-YSZ for precise oxygen detection in sulfur-rich environments. Designed for smelter gas analysis with enhanced selectivity and temperature compensation capabilities.
Overview
The WO3-YSZ electrochemical oxygen sensor is engineered for precise oxygen detection in challenging environments, particularly in sulfur-rich smelter gases. The sensor integrates a porous tungsten trioxide (WO3) sensing layer with yttria-stabilized zirconia (YSZ) substrates, complemented by platinum/gold electrodes. Its design allows for the optimization of sensor response and selectivity through polarization techniques, enhancing oxygen detection while minimizing interference from other gas impurities. The sensor's integrated heating element and platinum temperature sensor enable it to compensate for temperature variations in exhaust gases, making it highly suitable for harsh industrial applications.
Technical specifications
- Fabrication: WO3 layer screen printed on YSZ substrates
- Electrodes: Platinum/gold for enhanced conductivity
- Polarization: Adjustable to optimize response and selectivity
- Temperature operation: Stable above 500°C
- Environment resistance: SO2 resistant, ideal for smelter applications
- Packaging: Compatible with existing solutions for harsh environments
Technology readiness level
Currently at TRL 3, the technology has been validated in laboratory settings. The next phase involves fabricating sensors using screen-printing techniques and testing them in simulated smelter exhaust environments. The validation process includes measuring sensor response across varying oxygen concentrations and temperatures, and assessing stability in the presence of sulfur dioxide.
About Colorado School of Mines
Mines is a specialized public research university focused on engineering and applied science, known for a hands-on, industry-facing culture. Companies collaborate with faculty in co-located labs and at field-scale test sites across the Rocky Mountain region, enabling validation in real-world conditions. Its Golden location places partners near a U.S. Department of Energy national laboratory and within the Front Range innovation corridor, providing access to suppliers, startups, and major corporate R&D. Research is supported by competitive federal funding, notably from the National Science Foundation and the U.S. Department of Energy. A dedicated technology transfer office streamlines IP, licensing, sponsored research, and startup formation.
delivered to your inbox.