New ZnO-Based Glass Ceramic Sensor for H2 and NO2 Detection

Abstract

In this study, a glass ceramic with a nominal composition 58ZnO:4Bi2O3:4WO3:33.3B2O3 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, NH3, H2 and NO2 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 NO2 concentration range was not explored, the observed results are comparable with the latest found in the literature.

The Concurrent Sintering-Crystallization Behavior of Fluoride-Containing Wollastonite Glass-Ceramics

“…The polymeric transition from para-wollastonite (β-CaSiO 3 ) to pseudo-wollastonite (α-CaSiO 3 ) occurs when temperature is above 1125 • C [1]. Wollastonite glass-ceramics possess outstanding characteristics, i.e., high whiteness, low moisture absorption, low thermal expansion, low shrinkage, and low dielectric constant, which are suitable for wide applications in ceramics, chemicals, electronic devices, dental implant, construction, and polymers [2][3][4][5].…”

Electromagnetic Shielding Effectiveness and Conductivity of PTFE/Ag/MWCNT Conductive Fabrics Using the Screen Printing Method

“…This research provides a method to improve high-frequency electromagnetic shielding and thermal properties [11]. By introducing MWCNTs to increase the conductivity and stretchability of conductive silver paste, screen printing can be used to print an effective shielding circuit [12][13][14][15]. A polytetrafluoroethylene (PTFE) substrate can be attached to the nonwoven EMI shielding film with a low manufacturing cost, high EMSE, and high reliability [16][17][18][19].…”