• G. B. SHELKE

Pure and bulk ZrO2 and SnO2 thick films as well as their nanocomposite powders were observed to be less sensitive to polluting, hazardous and inflammable gases. Hence, nanostructured zirconium oxide and tin oxide powders were synthesized by disc type ultrasonicated microwave treatment followed centrifuge technique. The suitable proportion of as synthesized powders of ZrO2 and SnO2 forms the nanocomposite, Zr(0.75)Sn(0.25)O4. Thick films of nanocomposite Zr(0.75)Sn(0.25)O4 powder were fabricated by screen printing technique. These films were surface activated by Bi2O3 for different intervals of time followed by firing at 450oC for 30 min. The characterizations, viz. surface morphology, chemical composition, crystal structure, electrical and gas sensing performance of the pure and modified nanostructured Zr(0.75)Sn(0.25)O4 powder by Bismuth Oxide were investigated by X- Ray Diffraction, Field Effect Scanning Electron Microscope and Energy Dispersive Analysis by X- Ray techniques.

Synthesis, Thick Films, Surface Activation, XRD, EDAX, FE-SEM, NH3 Sensor, etc.

"Synthesis, Characterizations and Gas Sensing Performance of Bi2O3 Surface Activated Zr(0.75)Sn(0.25)O4 Thick Films ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 11, page no.665-671, November-2018, Available :http://www.jetir.org/papers/JETIR1811B98.pdf

"Synthesis, Characterizations and Gas Sensing Performance of Bi2O3 Surface Activated Zr(0.75)Sn(0.25)O4 Thick Films ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 11, page no. pp665-671, November-2018, Available at : http://www.jetir.org/papers/JETIR1811B98.pdf