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- W2890211115 abstract "ZnO nanostructures were used to prepare sintered ZnO dics that were pure ZnO discs (ZnO-100) and kaolin-doped ZnO discs (ZnO-97) containing 3 weight % of kaolin. The ZnO powder was mixed via ball milling process, pressed into discs and sintered at 1000 °C followed by annealing at 700 °C under oxygen ambient. The annealed discs were labeled as ZnO-100/O2 and ZnO-97/O2. Optical, structural and electrical properties were characterized using Raman scattering, XRD and current-voltage measurement. The crystallite size of ZnO was calculated using XRD data in that pure ZnO-100 had crystallite size of 33.034 nm and ZnO-100/O2 oxygen annealed had 41.972 nm. The XRD data also showed oxygen annealed kaolin-doped ZnO-97/O2 had a smaller crystallite size of 13.054 nm while unannealed kaolin-doped ZnO-97 had 14.285 nm. Kaolin doping and oxygen annealing on ZnO discs appeared to affect crystallite size. The resistance measured on the ZnO disc surface revealed that doped ZnO-97 had lower resistance (2 MΩ) compared to ZnO-100 (6 MΩ). On the other hand, annealed ZnO-97 O2 had a lower resistance (0.8 MΩ) compared to annealed ZnO-100 O2 (30 MΩ). The aluminum element in kaolin could have served as a dopant that lowered the potential barrier for electrical conduction to take place." @default.
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- W2890211115 date "2018-08-01" @default.
- W2890211115 modified "2023-09-27" @default.
- W2890211115 title "Effects of Oxygen Annealing on Kaolin-Doped Zinc Oxide Discs" @default.
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- W2890211115 doi "https://doi.org/10.1088/1742-6596/1083/1/012006" @default.
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