New ZnO-Based Glass Ceramic Sensor for H(2) and NO(2) Detection

In this study, a glass ceramic with a nominal composition 58ZnO:4Bi(2)O(3):4WO(3):33.3B(2)O(3) 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(3), H(2) and NO(2) 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(2) concentration range was not explored, the observed results are comparable with the latest found in the literature.