Dependence of domain boundaries on oxygen pressure and temperature
Pp
Pp
Pn
Pn
Ionic domains
p-cond.
n-cond
High temperature oxygen sensors
• Temperature range: 600 - 1500ºC• Pressure range becomes smaller with
increasing temperature.• Good resistance toward corrosive
atmospheres.• Good temperature shock resistance.• It is the equilibrium oxygen pressure which
is measured!
In-situ measurements
Examples:
- Combustion control in gas- and coal fired furnaces;
-Atmosphere control in sintering and heat treatment furnaces.
- Combustion of waste;
Extractive control of welding gases
TIG- tungsteninert gas welding
Argon
Gas on backside must be controlled.
Welding of stainless steel.
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