Surface modified BaTiO3 thick film resistors as H2S gas sensors

Abstract The thick films of BaTiO3 were prepared by screen-printing technique. The dipping technique was used to obtain surface chrominated BaTiO3 films. The sensitivity, selectivity and the stability of pure and chrominated BaTiO3 films were measured in the presence of air and H2S gas (100 ppm). The role played by the chromium species to enhance the sensitivity and to improve the selectivity and stability of the sensor is discussed. The reasons behind the fast response and recovery of the sensor are also discussed.

[1]  Tong Zhang,et al.  Improvement of nanocrystalline BaTiO3 humidity sensing properties , 2000 .

[2]  W. Wlodarski,et al.  Perovskite oxide of PTCR ceramics as chemical sensors , 2001 .

[3]  Norio Miura,et al.  Dilute hydrogen sulfide sensing properties of CuO–SnO2 thin film prepared by low-pressure evaporation method , 1998 .

[4]  L. A. Patil,et al.  Cucl2 assisted cubic to hexagonal phase transformation of cadmium sulphide , 1999 .

[5]  M. Haradome,et al.  High Sensitivity H 2 S Gas Sensors , 1985 .

[6]  F. Albert Cotton,et al.  Advanced Inorganic Chemistry , 1999 .

[7]  L. A. Patil,et al.  Surface cupricated SnO2-ZnO thick films as a H2S gas sensor , 2004 .

[8]  Yoshifumi Yamamoto,et al.  Sensing properties to dilute hydrogen sulfide of ZnSb2O6 thick-film prepared by dip-coating method , 2000 .

[9]  K. Vijayamohanan,et al.  Comparative studies of doped and surface modified tin oxide towards hydrogen sensing: Synergistic effects of Pd and Ru , 1998 .

[10]  Qin Wei,et al.  Study on CuO–BaTiO3 semiconductor CO2 sensor , 2001 .

[11]  Andrey Bratov,et al.  Enzyme semiconductor sensor based on butyrylcholinesterase , 1991 .

[12]  K. Vijayamohanan,et al.  Selective hydrogen sensing properties of surface functionalized tin oxide , 1999 .

[13]  L. A. Patil,et al.  Studies on ‘fritted’ thick films of photoconducting CdS , 1998 .

[14]  Noboru Yamazoe,et al.  Effects of additives on semiconductor gas sensors , 1983 .

[15]  Marina N. Rumyantseva,et al.  CuO/SnO2 thin film heterostructures as chemical sensors to H2S , 1998 .

[16]  Zilong Tang,et al.  Experimental study on the mechanism of BaTiO3-based PTC–CO gas sensor , 2003 .

[17]  Min-Suk Lee,et al.  A new process for fabricating CO2-sensing layers based on BaTiO3 and additives , 2000 .

[18]  He Xiuli,et al.  Thin film sensors of SnO2-CuO-SnO2 sandwich structure to H2S , 2001 .

[19]  T. Ishihara,et al.  Improved sensitivity of CuOBaTiO3 capacitive-type CO2 sensor by additives , 1995 .

[20]  G. Mangamma,et al.  EFFECTS OF SILICA ADDITIONS ON H2S SENSING PROPERTIES OF CUO-SNO2 SENSORS , 1998 .

[21]  Norio Miura,et al.  CuO-SnO2 element for highly sensitive and selective detection of H2S , 1992 .

[22]  V. Lantto,et al.  Response of Some SnO2 Gas Sensors to H 2 S after Quick Cooling , 1988 .

[23]  Tatsumi Ishihara,et al.  Application of a Mixed Oxide Capacitor to the Selective Carbon Dioxide Sensor II . Sensing Characteristics of a Oxide Capacitor , 1991 .

[24]  K. Vijayamohanan,et al.  Surface ruthenated tin oxide thin-film as a hydrocarbon sensor , 2001 .

[25]  S. Manorama,et al.  Hydrogen sulfide sensor based on tin oxide deposited by spray pyrolysis and microwave plasma chemical vapor deposition , 1994 .

[26]  T. Kutty,et al.  Current‐limiting action of mixed‐phase BaTiO3 ceramic semiconductors , 1990 .

[27]  K. Wakino,et al.  Processing Techniques and Applications of Positive Temperature Coefficient Thermistors , 1963 .

[28]  S. Manorama,et al.  Gas Sensitivity of SnO2 / CuO Heterocontacts , 1995 .

[29]  T. Kutty,et al.  Varistor property of n‐BaTiO3 based current limiters , 1991 .

[30]  K. Vijayamohanan,et al.  A highly selective ammonia gas sensor using surface-ruthenated zinc oxide , 1999 .

[31]  Tatsumi Ishihara,et al.  Application of Mixed Oxide Capacitor to the Selective Carbon Dioxide Sensor I . Measurement of Carbon Dioxide Sensing Characteristics , 1991 .

[32]  K. Vijayamohanan,et al.  Impedance studies of an LPG sensor using surface ruthenated tin oxide , 1999 .

[33]  Jörg-Uwe Meyer,et al.  A novel thick film conductive type CO2 sensor , 1996 .

[34]  Zilong Tang,et al.  Studies on grain-boundary chemistry of perovskite ceramics as CO gas sensors , 2003 .