Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption
Despite the many attractive potential uses of ceramic materials as humidity sensors, some unavoidable drawbacks, including toxicity, poor biocompatibility, long response and recovery times, low sensitivity and high hysteresis have stymied the use of these materials in advanced applications. Therefor...
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| Format: | Article |
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MDPI AG
2016-07-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/16/7/1135 |
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| author | Ashis Tripathy Sumit Pramanik Ayan Manna Satyanarayan Bhuyan Nabila Farhana Azrin Shah Zamri Radzi Noor Azuan Abu Osman |
| author_facet | Ashis Tripathy Sumit Pramanik Ayan Manna Satyanarayan Bhuyan Nabila Farhana Azrin Shah Zamri Radzi Noor Azuan Abu Osman |
| author_sort | Ashis Tripathy |
| collection | DOAJ |
| description | Despite the many attractive potential uses of ceramic materials as humidity sensors, some unavoidable drawbacks, including toxicity, poor biocompatibility, long response and recovery times, low sensitivity and high hysteresis have stymied the use of these materials in advanced applications. Therefore, in present investigation, we developed a capacitive humidity sensor using lead-free Ca,Mg,Fe,Ti-Oxide (CMFTO)-based electro-ceramics with perovskite structures synthesized by solid-state step-sintering. This technique helps maintain the submicron size porous morphology of the developed lead-free CMFTO electro-ceramics while providing enhanced water physisorption behaviour. In comparison with conventional capacitive humidity sensors, the presented CMFTO-based humidity sensor shows a high sensitivity of up to 3000% compared to other materials, even at lower signal frequency. The best also shows a rapid response (14.5 s) and recovery (34.27 s), and very low hysteresis (3.2%) in a 33%–95% relative humidity range which are much lower values than those of existing conventional sensors. Therefore, CMFTO nano-electro-ceramics appear to be very promising materials for fabricating high-performance capacitive humidity sensors. |
| first_indexed | 2024-04-11T18:03:27Z |
| format | Article |
| id | doaj.art-c4f139b080664950984a4ffd1342c21a |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:03:27Z |
| publishDate | 2016-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-c4f139b080664950984a4ffd1342c21a2022-12-22T04:10:25ZengMDPI AGSensors1424-82202016-07-01167113510.3390/s16071135s16071135Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via PhysisorptionAshis Tripathy0Sumit Pramanik1Ayan Manna2Satyanarayan Bhuyan3Nabila Farhana Azrin Shah4Zamri Radzi5Noor Azuan Abu Osman6Centre for Applied Biomechanics, Department of Biomedical Engineering, University of Malaya, Kuala Lumpur 50603, MalaysiaCentre for Applied Biomechanics, Department of Biomedical Engineering, University of Malaya, Kuala Lumpur 50603, MalaysiaCentre for Applied Biomechanics, Department of Biomedical Engineering, University of Malaya, Kuala Lumpur 50603, MalaysiaDepartment of Electronics & Instrumentation Engineering ITER, Siksha ‘O’ Anusandhan University, Bhubaneswar 751030, IndiaDepartment of Paediatric Dentistry & Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, MalaysiaDepartment of Paediatric Dentistry & Orthodontics, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, MalaysiaCentre for Applied Biomechanics, Department of Biomedical Engineering, University of Malaya, Kuala Lumpur 50603, MalaysiaDespite the many attractive potential uses of ceramic materials as humidity sensors, some unavoidable drawbacks, including toxicity, poor biocompatibility, long response and recovery times, low sensitivity and high hysteresis have stymied the use of these materials in advanced applications. Therefore, in present investigation, we developed a capacitive humidity sensor using lead-free Ca,Mg,Fe,Ti-Oxide (CMFTO)-based electro-ceramics with perovskite structures synthesized by solid-state step-sintering. This technique helps maintain the submicron size porous morphology of the developed lead-free CMFTO electro-ceramics while providing enhanced water physisorption behaviour. In comparison with conventional capacitive humidity sensors, the presented CMFTO-based humidity sensor shows a high sensitivity of up to 3000% compared to other materials, even at lower signal frequency. The best also shows a rapid response (14.5 s) and recovery (34.27 s), and very low hysteresis (3.2%) in a 33%–95% relative humidity range which are much lower values than those of existing conventional sensors. Therefore, CMFTO nano-electro-ceramics appear to be very promising materials for fabricating high-performance capacitive humidity sensors.http://www.mdpi.com/1424-8220/16/7/1135relative humiditywater absorptionporoushydrophilicityresponserecoverystabilitymechanism |
| spellingShingle | Ashis Tripathy Sumit Pramanik Ayan Manna Satyanarayan Bhuyan Nabila Farhana Azrin Shah Zamri Radzi Noor Azuan Abu Osman Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption Sensors relative humidity water absorption porous hydrophilicity response recovery stability mechanism |
| title | Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption |
| title_full | Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption |
| title_fullStr | Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption |
| title_full_unstemmed | Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption |
| title_short | Design and Development for Capacitive Humidity Sensor Applications of Lead-Free Ca,Mg,Fe,Ti-Oxides-Based Electro-Ceramics with Improved Sensing Properties via Physisorption |
| title_sort | design and development for capacitive humidity sensor applications of lead free ca mg fe ti oxides based electro ceramics with improved sensing properties via physisorption |
| topic | relative humidity water absorption porous hydrophilicity response recovery stability mechanism |
| url | http://www.mdpi.com/1424-8220/16/7/1135 |
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