Dielectric properties of (1− x )Sr 0.92 La 0.08 TiO 3 -( x )CaMn 0.98 Nb 0.02 O 3 ceramics under violet light irradiation
| Autor: | Suwapitcha Buntham, Panupong Jaiban, Anucha Watcharapasorn |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Diffraction Materials science Absorption spectroscopy Condensed matter physics Mechanical Engineering Analytical chemistry Photodetector 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Synchrotron law.invention Mechanics of Materials law visual_art 0103 physical sciences visual_art.visual_art_medium General Materials Science Ceramic Irradiation Electroceramics 0210 nano-technology |
| Zdroj: | Materials Letters. 193:133-137 |
| ISSN: | 0167-577X |
| Popis: | (1− x )Sr 0.92 La 0.08 TiO 3 -( x )CaMn 0.98 Nb 0.02 O 3 (SLTO-CMNO) ceramics with x = 0, 0.1, 0.2 and 0.3 were prepared employing a solid state sintering method. X-ray diffraction patterns and X-ray absorption spectra from synchrotron light indicated the substitution of CMNO in SLTO ceramic. Upon CMNO addition, existence of A and B-site vacancies was induced. When violet light irradiated the samples, oxygen vacancies were produced and in turn trapped by these cationic site vacancies, inducing defect dipoles. The dielectric enhancement under light stimulus was observed in correlation with defect dipoles. The results here suggested that photo-induced dielectric properties of SLTO may be largely tunable by CMNO addition, and SLTO-CMNO ceramics could be an alternative material for light sensor. |
| Databáze: | OpenAIRE |
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