Bullet Sr(II)-added ZnAl2O4 Spinel Composites as an Ammonia Sensor
Pure and strontium(II) added ZnAl2O4 composites was prepared by sol – gel technique and tested for the detection of ammonia vapor. XRD, SEM and BET measurements were employed to identify the structural phases, surface morphology and surface area of the composites. The composites sintered at 900oC fo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IFSA Publishing, S.L.
2008-04-01
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| Series: | Sensors & Transducers |
| Subjects: | |
| Online Access: | http://www.sensorsportal.com/HTML/DIGEST/april_08/P_265.pdf |
| Summary: | Pure and strontium(II) added ZnAl2O4 composites was prepared by sol – gel technique and tested for the detection of ammonia vapor. XRD, SEM and BET measurements were employed to identify the structural phases, surface morphology and surface area of the composites. The composites sintered at 900oC for 5h, were subjected to dc resistance measurements in the temperature range of 50-250oC to study the ammonia vapor sensing characteristics. With increase in temperature the sensitivity increases up to the optimum temperature and thereafter decreases. An increase in the sensitivity was observed with increase in ammonia concentration from 100-5000 ppm at their respective optimum temperature. Among the composites, ZnSA5 with higher Sr(II) content showed the best sensitivity towards ammonia vapor detection. |
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| ISSN: | 2306-8515 1726-5479 |