Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor
Armalcolite, a current motivated rare earth ceramic usually available in the moon, had been used for the first time, as dielectric-type humidity sensors. The armalcolite nanocomposite was prepared using multistep solid-state sintering under high pressure and a high-sensitive dielectric sensor was de...
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| Format: | Article |
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Wiley
2017
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| author | Tripathy, Ashis Pramanik, Sumit Manna, Ayan Radzi, Zamri Abu Osman, Noor Azuan |
| author_facet | Tripathy, Ashis Pramanik, Sumit Manna, Ayan Radzi, Zamri Abu Osman, Noor Azuan |
| author_sort | Tripathy, Ashis |
| collection | UM |
| description | Armalcolite, a current motivated rare earth ceramic usually available in the moon, had been used for the first time, as dielectric-type humidity sensors. The armalcolite nanocomposite was prepared using multistep solid-state sintering under high pressure and a high-sensitive dielectric sensor was developed for humidity controlling applications. Different concerning phases developed by the proper sintering were analyzed precisely by X-ray diffraction (XRD) as well as scanning electron microscopy (SEM). At 100 Hz frequency, the obtained dielectric constant was 24 times greater at 95% relative humidity (RH) as compared to 33% RH. The armalcolite-based sensor showed lower hysteresis (<3.5%), good stability, and faster response (~18 seconds) and recovery (~35 seconds) times compared to conventional humidity sensors. The sensing mechanism of the nanocomposite was categorically determined by the analyzed characteristics parameters such as dielectric constants, normalized loss tangent, and alternating current conductivity properties. This study also confirmed that the whole conduction mechanism was accomplished by electrons or ions and dipoles in the entire RH range. Therefore, the present armalcolite-based porous nanocomposite would be a potential sensing material for novel humidity sensors. |
| first_indexed | 2024-03-06T05:58:15Z |
| format | Article |
| id | um.eprints-22873 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:58:15Z |
| publishDate | 2017 |
| publisher | Wiley |
| record_format | dspace |
| spelling | um.eprints-228732019-10-26T07:05:45Z http://eprints.um.edu.my/22873/ Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor Tripathy, Ashis Pramanik, Sumit Manna, Ayan Radzi, Zamri Abu Osman, Noor Azuan R Medicine TJ Mechanical engineering and machinery Armalcolite, a current motivated rare earth ceramic usually available in the moon, had been used for the first time, as dielectric-type humidity sensors. The armalcolite nanocomposite was prepared using multistep solid-state sintering under high pressure and a high-sensitive dielectric sensor was developed for humidity controlling applications. Different concerning phases developed by the proper sintering were analyzed precisely by X-ray diffraction (XRD) as well as scanning electron microscopy (SEM). At 100 Hz frequency, the obtained dielectric constant was 24 times greater at 95% relative humidity (RH) as compared to 33% RH. The armalcolite-based sensor showed lower hysteresis (<3.5%), good stability, and faster response (~18 seconds) and recovery (~35 seconds) times compared to conventional humidity sensors. The sensing mechanism of the nanocomposite was categorically determined by the analyzed characteristics parameters such as dielectric constants, normalized loss tangent, and alternating current conductivity properties. This study also confirmed that the whole conduction mechanism was accomplished by electrons or ions and dipoles in the entire RH range. Therefore, the present armalcolite-based porous nanocomposite would be a potential sensing material for novel humidity sensors. Wiley 2017 Article PeerReviewed Tripathy, Ashis and Pramanik, Sumit and Manna, Ayan and Radzi, Zamri and Abu Osman, Noor Azuan (2017) Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor. Journal of the American Ceramic Society, 100 (11). pp. 5131-5140. ISSN 0002-7820, DOI https://doi.org/10.1111/jace.15033 <https://doi.org/10.1111/jace.15033>. https://doi.org/10.1111/jace.15033 doi:10.1111/jace.15033 |
| spellingShingle | R Medicine TJ Mechanical engineering and machinery Tripathy, Ashis Pramanik, Sumit Manna, Ayan Radzi, Zamri Abu Osman, Noor Azuan Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor |
| title | Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor |
| title_full | Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor |
| title_fullStr | Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor |
| title_full_unstemmed | Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor |
| title_short | Dielectric and AC conductivity studies of novel porous armalcolite nanocomposite-based humidity sensor |
| title_sort | dielectric and ac conductivity studies of novel porous armalcolite nanocomposite based humidity sensor |
| topic | R Medicine TJ Mechanical engineering and machinery |
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