Optical Characterization and Humidity Sensing Properties of Praseodymium Oxide
This paper reports the humidity sensing properties of praseodymium oxide (99 % pure, Johnson & Matthey, London) and its characterization. The pellet of praseodymium oxide was made under a pressure of 616 MPa and it was annealed at 200, 400, 600 and 800 oC for 2 hrs successively. After each step...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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IFSA Publishing, S.L.
2011-02-01
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| Series: | Sensors & Transducers |
| Subjects: | |
| Online Access: | http://www.sensorsportal.com/HTML/DIGEST/february_2011/P_751.pdf |
| Summary: | This paper reports the humidity sensing properties of praseodymium oxide (99 % pure, Johnson & Matthey, London) and its characterization. The pellet of praseodymium oxide was made under a pressure of 616 MPa and it was annealed at 200, 400, 600 and 800 oC for 2 hrs successively. After each step of annealing, the pellet was exposed to humidity. It was observed that as relative humidity (% RH) increases, there is a decrease in the resistance for entire range of humidity. The highest sensitivity of the humidity sensor was found 6 MΩ/%RH at room temperature. Distribution of grains and pores were observed by SEM. XR D of sensing material revealed the phase and lattice structure of praseodymium oxide. Crystallite size of sensing material lies between 132-297 nm. The proposed investigation provides a new step in developing towards simple, reliable and sensitive humidity sensor.
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| ISSN: | 2306-8515 1726-5479 |