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- W4281553679 abstract "Abstract La-doped Ba 1 − x La x SnO 3 (x = 0.0, 0.01, 0.02, 0.03) powders were prepared by solid-state reaction method for improving their specific gas sensing properties. Highly pure single perovskite phase n-type BaSnO 3 (BSO) ceramics were synthesized after sintering at 1300°C. The materials were characterized by X-ray diffraction (XRD). Ba 1 − x La x SnO 3 (BLSO) compositions stabilized in cubic crystalline phase (space group Pm-3m). Lattice constant variation with La-doping is attributed to two competing effects of ionic radii variation as well as reduction of B-site valence. Microstructure and elemental analysis exhibited La being incorporated into the lattice and doping induced surface homogeneity enhancing. Raman measurements give phonon bands that are Raman forbidden under cubic symmetry suggesting that local structural distortion occurs with average cubic structure. Thick films were used for measurng the gas sensing behavior (selectivity and sensitivity) for LPG, CO 2 , C 2 H 5 OH, NH 3, H 2 , Cl 2 , H 2 S. The compositions show the selective response for Ammonia and Ethanol at 100°C and room temperature (27°C) respectively. Ba 1 − x La x SnO 3 (x = 0.02) composition at an operating temperature of 100°C show maximum response of 10.67 for ammonia (NH 3 ) whereas Ba 1 − x La x SnO 3 (x = 0.01) composition at 27°C shows maximum response of 18.61 for ethanol (C 2 H 5 OH) at 100 ppm gas concentration. The gas sensing mechanism and the selectivity enhancement due to La-doping are discussed." @default.
- W4281553679 created "2022-05-27" @default.
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- W4281553679 date "2022-05-26" @default.
- W4281553679 modified "2023-10-15" @default.
- W4281553679 title "Effect of Lanthanum doping on the specific gas sensing behavior on BaSnO3" @default.
- W4281553679 doi "https://doi.org/10.21203/rs.3.rs-1696042/v1" @default.
- W4281553679 hasPublicationYear "2022" @default.
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