Abstract
In this study, a glass ceramic with a nominal composition 58ZnO:4Bi&sub2;O&sub3;:4WO&sub3;:33.3B&sub2;O&sub3; was synthesized by melt quenching technique. A gas sensor was then manufactured using a ZnO sol-gel phase as a permanent binder of the glass-ceramic to an alumina substrate having interdigitated electrodes. The film sensitivity towards humidity, NH&sub3;, H&sub2; and NO&sub2; was studied at different temperatures. X-ray diffraction technique (XRD), field emission- scanning electron microscopy (FE-SEM) and differential thermal analysis (DTA) were used to characterize the prepared material. Though the response in the sub-ppm NO&sub2; concentration range was not explored, the observed results are comparable with the latest found in the literature.