• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/030/01/0009-0017

    • Keywords

       

      (Ba0.87Sr0.13)TiO3 thick films; ammonia gas sensor; H2S gas sensor; sensitivity; selectivity.

    • Abstract

       

      Barium strontium titanate ((Ba0.87Sr0.13)TiO3–BST) ceramic powder was prepared by mechanochemical process. The thick films of different thicknesses of BST were prepared by screen-printing technique and gas-sensing performance of these films was tested for various gases. The films showed highest response and selectivity to ammonia gas. The effect of film thickness on gas response was also studied. As prepared BST thick films were surface modified by dipping them into an aqueous solution of titanium chloride (TiCl3) for different intervals of time. Surface modification shifted response to H2S gas suppressing the responses to ammonia and other gases. The surface modification, using dipping process, altered the adsorbate–adsorbent interactions, which gave the unusual sensitivity and selectivity effect. Sensitivity, selectivity, thermal stability, response and recovery time of the sensor were measured and presented.

    • Author Affiliations

       

      G H Jain1 L A Patil1 P P Patil2 U P Mulik3 K R Patil4

      1. P.G. Department of Physics, Pratap College, Amalner 425 401, India
      2. Physical Sciences, North Maharashtra University, Jalgaon 425 001, India
      3. Centre for Materials for Electronics Technology, Pune 411 008, India
      4. National Chemical Laboratory, Pune 411 008, India
    • Dates

       
  • Bulletin of Materials Science | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.