T. Lang et al., MATERIAL CHARACTERIZATION OF SPUTTERED SODIUM-ION CONDUCTIVE CERAMICSFOR A PROTOTYPE CO2 MICRO-SENSOR, Sensors and actuators. B, Chemical, 31(1-2), 1996, pp. 9-12
RF magnetron sputtered Nasicon and sodium carbonate ionic conductive t
hin films (2000 Angstrom) have been characterized using physical-chemi
cal methods such as Auger electron spectroscopy (AES), X-ray photoelec
tron spectroscopy (XPS), scanning electron microscopy (SEM) and electr
ochemical impedance spectroscopy (EIS). It is found that the overall c
hemical composition of sputtered and of laser deposited films is simil
ar to that of the sputtering target. The Nasicon films show a sufficie
ntly high ionic conductivity (0.36 S cm(-1) at 360 degrees C) for use
in a prototype integrated CO2 sensor with the dimensions of 3 x 4 mm.