As oxygen storage material

ceria-zirconia solid solution has high oxygen storage capacity（OSC）.A novel potentiometric oxygen sensor used in monitoring exhaust gas emissions is developed by employing a solid solution as the solid-state reference.The sensor consists of yttria-stabilized-zirconia（YSZ） electrolyte

ceria-zirconia reference layers and platinum electrodes.Tests are performed with two simulated gases mixture of N2 and O2 at operating temperature of 350

400

450℃.The result shows that a sharp transition from 520

-

100mV occurs at the stoichiometric value.Compared with the conventional oxygen sensors

the sensor has many advantages

such as the lower cost

easy to miniaturize

etc.