Nanocrystalline spinel Ni x Cu0.8−x Zn0.2Fe2O4: a novel material for humidity sensing
| Autor: | B. Jeyaraj, A. Dayalan, K. S. Nagaraja, V. Jeseentharani, L. Reginamary |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Spinel Analytical chemistry Mineralogy Humidity engineering.material Nanocrystalline material Mechanics of Materials Electrical resistivity and conductivity visual_art engineering visual_art.visual_art_medium Ferrite (magnet) General Materials Science Relative humidity Ceramic |
| Zdroj: | Journal of Materials Science. 47:3529-3534 |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-011-6198-9 |
| Popis: | The humidity sensing property of the ferrite systems Ni x Cu0.8−x Zn0.2Fe2O4 with 0.0 ≤ x ≤ 0.8 (x = 0, 0.2, 0.4, 0.6, 0.8) was studied using the standard ceramic technique. The spinel structure of the compounds was confirmed by X-ray diffraction studies, BET study and surface morphology by scanning electron microscopy. The compounds were subjected to dc electrical conductivity studies at room temperature. The resistance measurements as a function of relative humidity (RH) in the range of 5–98% were done and the humidity sensing factors (S f = R 5%/R 95%) were calculated. The composite NiCuZn-3 (x = 0.4) possessed the highest humidity sensing factor of 3051.9 ± 500, whilst CuZn–1 (x = 0) possessed the lowest humidity sensing factor of 45.3 ± 12. The other compounds possessed lower humidity sensing factors of 116.7 ± 35, 783.4 ± 160 and 416.2 ± 65 for x = 0.2, 0.6 and 0.8, respectively. |
| Databáze: | OpenAIRE |
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