Sintering Behavior of ZnO: Mn Ceramics Fabricated from Sol-Gel Derived Nanocrystalline powders
| Autor: | Ahmet Yavuz Oral, Zehra Banu Bahşi, Aligul Buyukaksoy, N. C. Köseoğlu, Muhammed Hasan Aslan |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Spinel Metals and Alloys Sintering Mineralogy engineering.material Condensed Matter Physics Microstructure Nanocrystalline material law.invention Nanocrystal Chemical engineering law Powder metallurgy Materials Chemistry engineering Calcination Physical and Theoretical Chemistry Sol-gel |
| Zdroj: | International Journal of Materials Research. 100:708-712 |
| ISSN: | 2195-8556 1862-5282 |
| Popis: | Undoped and Mn doped ZnO ceramics, sintered at 1200 °C, were produced from sol-gel derived nanocrystalline powders calcined at 750 °C. Mn doped powders showed trace amounts of spinel (ZnMn2O4) phase in addition to a dominant zincite phase, while Mn doped ceramics were comprised solely of zincite structure. X-ray mapping of the powders did not reveal any Mn concentrated areas, indicating that the ZnMn2O4 phase was homogeneously distributed with a very small grain size. The grain size of the undoped powders was around 50 nm, and there was a minor increase in the grain size when powders were doped with Mn. Undoped ceramics exhibited grain sizes distributed in the range 2 – 10 μm while Mn doped ceramics displayed slightly smaller grains. Relative densities of the undoped and Mn doped ceramics were measured as 0.695 and 0.950, respectively. |
| Databáze: | OpenAIRE |
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