MODIFICATION OF LANTHANUM OXYCHLORIDE SOLID ELECTROLYTE FOR CONVENTIONAL POTENTIOMETRIC CHLORINE GAS SENSOR

La1-xMgxOCl1-x (x = 0.025, 0.05 and 0.1) and La0.9Ca0.1OCl0.9 samples were prepared by a solid state reaction method. The best preparation conditions were determined by means of the differential thermal analysis and thermogravimetry (DTA&TG). The samples were studied by X-ray diffraction (XRD) analysis. Electrical conductivity of La0.9Mg0.1OCl0.1 was measured using electrical impedance spectroscopy (EIS). The prototype chlorine gas sensor was constructed from La0.9Mg0.1OCl0.1 solid electrolyte. The source voltage (SV) of the constructed device was measured as a function of temperature (500-800 degrees C), Cl-2 gradient partial pressure and time. Similar measurements of SV was carried out in atmosphere of synthetic air in argon.