Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity
Abstract This research investigated the influence of temperature and humidity on the giant dielectric (GD) properties of 1% indium tin oxide and 1% Ta2O5 co‐doped TiO2 ceramics sintered at different temperatures. A single phase of rutile TiO2 was obtained in all sintered samples. The mean grain size...
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Wiley
2024-12-01
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| Series: | IET Nanodielectrics |
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| Online Access: | https://doi.org/10.1049/nde2.12085 |
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| author | Jurimart Wongsricha Viyada Harnchana Pornjuk Srepusharawoot Nutthakritta Phromviyo Pairot Moontragoon Prasit Thongbai |
| author_facet | Jurimart Wongsricha Viyada Harnchana Pornjuk Srepusharawoot Nutthakritta Phromviyo Pairot Moontragoon Prasit Thongbai |
| author_sort | Jurimart Wongsricha |
| collection | DOAJ |
| description | Abstract This research investigated the influence of temperature and humidity on the giant dielectric (GD) properties of 1% indium tin oxide and 1% Ta2O5 co‐doped TiO2 ceramics sintered at different temperatures. A single phase of rutile TiO2 was obtained in all sintered samples. The mean grain size increased with higher sintering temperatures, resulting in ceramics with a relative density exceeding 98%. A uniform dispersion of dopants and major elements was achieved. Remarkably, the dielectric constant increased significantly from 2 × 103 to 3.7 × 104 with a rising sintering temperature, primarily due to the enlarged grain size. Concurrently, the authors observed low loss tangents, ranging from tanδ≈0.016 to 0.024 at 1 kHz. Slight variations in the dielectric constant were observed with temperature from room temperature up to 210°C, while maintaining remarkably low tanδ. The GD properties were attributed to space charge polarisation at internal interfaces and defect dipoles. Further research explored the impact of environmental conditions on dielectric properties. Remarkably, the ceramics exhibited minimal capacitance variations of less than 10% within the relative humidity range of 30%–95% and temperatures from 15 to 85°C, indicating excellent dielectric stability. |
| format | Article |
| id | doaj-art-8dc9bfa1cfb247e28eb5d8a8450dbf7b |
| institution | OA Journals |
| issn | 2514-3255 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
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| series | IET Nanodielectrics |
| spelling | doaj-art-8dc9bfa1cfb247e28eb5d8a8450dbf7b2025-08-20T02:32:05ZengWileyIET Nanodielectrics2514-32552024-12-017427328110.1049/nde2.12085Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidityJurimart Wongsricha0Viyada Harnchana1Pornjuk Srepusharawoot2Nutthakritta Phromviyo3Pairot Moontragoon4Prasit Thongbai5Giant Dielectric and Computational Design Research Group (GD–CDR) Department of Physics Faculty of Science Khon Kaen University Nai Mueang Khon Kaen ThailandGiant Dielectric and Computational Design Research Group (GD–CDR) Department of Physics Faculty of Science Khon Kaen University Nai Mueang Khon Kaen ThailandGiant Dielectric and Computational Design Research Group (GD–CDR) Department of Physics Faculty of Science Khon Kaen University Nai Mueang Khon Kaen ThailandGiant Dielectric and Computational Design Research Group (GD–CDR) Department of Physics Faculty of Science Khon Kaen University Nai Mueang Khon Kaen ThailandGiant Dielectric and Computational Design Research Group (GD–CDR) Department of Physics Faculty of Science Khon Kaen University Nai Mueang Khon Kaen ThailandGiant Dielectric and Computational Design Research Group (GD–CDR) Department of Physics Faculty of Science Khon Kaen University Nai Mueang Khon Kaen ThailandAbstract This research investigated the influence of temperature and humidity on the giant dielectric (GD) properties of 1% indium tin oxide and 1% Ta2O5 co‐doped TiO2 ceramics sintered at different temperatures. A single phase of rutile TiO2 was obtained in all sintered samples. The mean grain size increased with higher sintering temperatures, resulting in ceramics with a relative density exceeding 98%. A uniform dispersion of dopants and major elements was achieved. Remarkably, the dielectric constant increased significantly from 2 × 103 to 3.7 × 104 with a rising sintering temperature, primarily due to the enlarged grain size. Concurrently, the authors observed low loss tangents, ranging from tanδ≈0.016 to 0.024 at 1 kHz. Slight variations in the dielectric constant were observed with temperature from room temperature up to 210°C, while maintaining remarkably low tanδ. The GD properties were attributed to space charge polarisation at internal interfaces and defect dipoles. Further research explored the impact of environmental conditions on dielectric properties. Remarkably, the ceramics exhibited minimal capacitance variations of less than 10% within the relative humidity range of 30%–95% and temperatures from 15 to 85°C, indicating excellent dielectric stability.https://doi.org/10.1049/nde2.12085ceramic capacitorsdielectric materialssinteringtitanium compounds |
| spellingShingle | Jurimart Wongsricha Viyada Harnchana Pornjuk Srepusharawoot Nutthakritta Phromviyo Pairot Moontragoon Prasit Thongbai Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity IET Nanodielectrics ceramic capacitors dielectric materials sintering titanium compounds |
| title | Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity |
| title_full | Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity |
| title_fullStr | Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity |
| title_full_unstemmed | Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity |
| title_short | Stability of giant dielectric properties in co‐doped rutile TiO2 ceramics under temperature and humidity |
| title_sort | stability of giant dielectric properties in co doped rutile tio2 ceramics under temperature and humidity |
| topic | ceramic capacitors dielectric materials sintering titanium compounds |
| url | https://doi.org/10.1049/nde2.12085 |
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