Gas sensing properties of Cu and Cr activated BST thick films

Bulletin of materials science

G H Jain¹  L A Patil¹ 

[1] P.G. Department of Physics, Pratap College, Amalner 425 401, India$$P.G. Department of Physics, Pratap College, Amalner 425 401, IndiaP.G. Department of Physics, Pratap College, Amalner 425 401, India$$

关键词: (Ba0.67Sr0.33)TiO3 thick films;    chromination;    cuprication;    H2S gas sensor;    sensitivity;    selectivity.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

H₂S gas sensing properties of BST ((Ba_0.67Sr_0.33)TiO₃) thick films are reported here for the first time. BST ceramic powder was prepared by mechanochemical process. Thick films of BST were prepared by screen-printing technique. The sensing performance of the films was tested for various gases. The films were surface customized by dipping them into aqueous solutions of CuCl₂ and CrO₃ for various intervals of time. These surface modified BST films showed improved sensitivity to H₂S gas (100 ppm) than pure BST film. Chromium oxide was observed to be a better activator than copper oxide in H₂S gas sensing. The effect of microstructure and amount of activators on H₂S gas sensing were discussed. The sensitivity, selectivity, stability, response and recovery time of the sensor were measured and presented.

【 授权许可】

Unknown