Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

Bulletin of materials science

G H Jain³  K R Patil¹  U P Mulik⁴  L A Patil³  P P Patil² 

[1] National Chemical Laboratory, Pune 411 008, India$$National Chemical Laboratory, Pune 411 008, IndiaNational Chemical Laboratory, Pune 411 008, India$$;Physical Sciences, North Maharashtra University, Jalgaon 425 001, India$$Physical Sciences, North Maharashtra University, Jalgaon 425 001, IndiaPhysical Sciences, North Maharashtra University, Jalgaon 425 001, India$$;P.G. Department of Physics, Pratap College, Amalner 425 401, India$$P.G. Department of Physics, Pratap College, Amalner 425 401, IndiaP.G. Department of Physics, Pratap College, Amalner 425 401, India$$;Centre for Materials for Electronics Technology, Pune 411 008, India$$Centre for Materials for Electronics Technology, Pune 411 008, IndiaCentre for Materials for Electronics Technology, Pune 411 008, India$$

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

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Barium strontium titanate ((Ba_0.87Sr_0.13)TiO₃â€�?�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 adsorbateâ€�?�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.

【 授权许可】

Unknown