Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7889099 | Ceramics International | 2018 | 33 Pages |
Abstract
Layered perovskite-type niobates A5Nb4O15 (A = Ba, Sr) are thought to be good candidates for microwave dielectric and water-splitting applications, but traditional solid-state syntheses of these compounds usually require high temperatures and complicated procedures. In this work, Ba5âxSrxNb4O15 (x = 0 â 5) perovskite solid solutions were obtained using a facile molten salt synthetic method. The crystal structure of Ba5âxSrxNb4O15 solid solutions were characterized by X-ray diffraction (XRD). Crystal structure parameters with different Sr2+ concentrations show that the lattice parameters and unit cell volumes of Ba5âxSrxNb4O15 decrease with increasing [Sr2+]. The humidity sensing behavior of Ba5âxSrxNb4O15 solid solutions was investigated over a wide relative humidity (RH) range, from 11% to 95%. Ba2Sr3Nb4O15 shows the highest sensitivity among the obtained samples with a humidity hysteresis of ca. 4% RH. The response-recovery times of the Ba2Sr3Nb4O15 sensor are only 2Â s and 17Â s as the humidity alternates between 11% and 95% RH, respectively, showing excellent potential as a humidity sensing material for practical applications.
Related Topics
Physical Sciences and Engineering
Materials Science
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Authors
Guo-Jin Ji, Le-Xi Zhang, Meng-Ya Zhu, Si-Meng Li, Jing Yin, Li-Xin Zhao, Bradley D. Fahlman, Li-Jian Bie,