Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties
In this study, (Zr0.5/Sb0.5)xTi1−xO2 ceramics with x = 0.01, 0.025, and 0.05 were prepared via the solid-state reaction (SSR) method. A pure phase of rutile TiO2 with a highly dense microstructure and relative density (ρr) higher than 96% was detected in all the sintered ceramics. The mean grain siz...
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Tsinghua University Press
2025-01-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9221005 |
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| author | Noppakorn Thanamoon Nateeporn Thongyong Kaniknun Sreejivungsa Narong Chanlek Prasit Thongbai |
| author_facet | Noppakorn Thanamoon Nateeporn Thongyong Kaniknun Sreejivungsa Narong Chanlek Prasit Thongbai |
| author_sort | Noppakorn Thanamoon |
| collection | DOAJ |
| description | In this study, (Zr0.5/Sb0.5)xTi1−xO2 ceramics with x = 0.01, 0.025, and 0.05 were prepared via the solid-state reaction (SSR) method. A pure phase of rutile TiO2 with a highly dense microstructure and relative density (ρr) higher than 96% was detected in all the sintered ceramics. The mean grain size was reduced, but the dielectric permittivity (ε′) increased. The giant dielectric properties were tested to investigate their possible use in capacitors and capacitive humidity sensors under various relative humidity (RH) levels ranging from 30% to 95% RH. (Zr0.5/Sb0.5)xTi1−xO2 ceramics present a giant ε′ of ~(4.82‒7.39)×104 and a low loss tangent (tanδ ≈ 0.031‒0.106 at 1 kHz), indicating attractive giant dielectric properties. This observation was attributed to both intrinsic and extrinsic effects. For the humidity sensing properties, the best humidity sensing properties were observed in the ceramics with x = 0.05, with a sensitivity of ~237%pF/%RH, a low hysteresis error (~1.6%), and fast response/recovery time of ~12 s/16 s at 1 kHz. The point defects of SbTi⋅ and VO⋅⋅ were claimed to be active centers for water absorption. Furthermore, impedance spectroscopy (IS) analysis revealed that changes in the dielectric properties with varying RH levels were also influenced by interfacial polarization at the surface layer and grain boundaries. |
| format | Article |
| id | doaj-art-805e7e4246aa4578b4f60348f04fa07d |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-805e7e4246aa4578b4f60348f04fa07d2025-01-24T07:52:15ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-01-01141922100510.26599/JAC.2024.9221005Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric propertiesNoppakorn Thanamoon0Nateeporn Thongyong1Kaniknun Sreejivungsa2Narong Chanlek3Prasit Thongbai4Giant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, ThailandGiant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, ThailandDepartment of Fundamental Science, Faculty of Science and Technology, Surindra Rajabhat University, Surin 32000, ThailandSynchrotron Light Research Institute (Public Organization), Nakhon Ratchasima 30000, ThailandGiant Dielectric and Computational Design Research Group (GD-CDR), Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, ThailandIn this study, (Zr0.5/Sb0.5)xTi1−xO2 ceramics with x = 0.01, 0.025, and 0.05 were prepared via the solid-state reaction (SSR) method. A pure phase of rutile TiO2 with a highly dense microstructure and relative density (ρr) higher than 96% was detected in all the sintered ceramics. The mean grain size was reduced, but the dielectric permittivity (ε′) increased. The giant dielectric properties were tested to investigate their possible use in capacitors and capacitive humidity sensors under various relative humidity (RH) levels ranging from 30% to 95% RH. (Zr0.5/Sb0.5)xTi1−xO2 ceramics present a giant ε′ of ~(4.82‒7.39)×104 and a low loss tangent (tanδ ≈ 0.031‒0.106 at 1 kHz), indicating attractive giant dielectric properties. This observation was attributed to both intrinsic and extrinsic effects. For the humidity sensing properties, the best humidity sensing properties were observed in the ceramics with x = 0.05, with a sensitivity of ~237%pF/%RH, a low hysteresis error (~1.6%), and fast response/recovery time of ~12 s/16 s at 1 kHz. The point defects of SbTi⋅ and VO⋅⋅ were claimed to be active centers for water absorption. Furthermore, impedance spectroscopy (IS) analysis revealed that changes in the dielectric properties with varying RH levels were also influenced by interfacial polarization at the surface layer and grain boundaries.https://www.sciopen.com/article/10.26599/JAC.2024.9221005humidity sensorhumidity-sensing propertiesgiant/colossal dielectric permittivityx-ray photoelectron spectroscopy (xps)point defecttio2 |
| spellingShingle | Noppakorn Thanamoon Nateeporn Thongyong Kaniknun Sreejivungsa Narong Chanlek Prasit Thongbai Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties Journal of Advanced Ceramics humidity sensor humidity-sensing properties giant/colossal dielectric permittivity x-ray photoelectron spectroscopy (xps) point defect tio2 |
| title | Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties |
| title_full | Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties |
| title_fullStr | Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties |
| title_full_unstemmed | Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties |
| title_short | Enhanced humidity-sensing performance of (Zr4+/Sb5+)-codoped TiO2 ceramics with giant dielectric properties |
| title_sort | enhanced humidity sensing performance of zr4 sb5 codoped tio2 ceramics with giant dielectric properties |
| topic | humidity sensor humidity-sensing properties giant/colossal dielectric permittivity x-ray photoelectron spectroscopy (xps) point defect tio2 |
| url | https://www.sciopen.com/article/10.26599/JAC.2024.9221005 |
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