| Effect of Drying Environment on Grain Size of Titanium Dioxide Nano-powder |
| Paper ID : 1352-UFGNSM-FULL |
| Authors: |
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pegah zandi1, Elham Hosseini2, Fereshteh Rashchi *3 1karegar shomali st. facultyof eng. metallurgy and materials eng. department, hydrometallurgy lab 2School of Metallurgy and Materials Engineering, Faculty of Engineering, University of Tehran 3University of Tehran |
| Abstract: |
| Titanium dioxide nanopowder has been prepared from titanium isopropoxide (TTIP) in chloride media by sol-gel method. In this research, the effect of the drying environment, from air to oven drying at 100℃, calcination time and temperature on Nano TiO2 grain size was investigated. The synthesized powder was analyzed by x-ray diffraction and scanning electron microscope. Based on the results, the powder has been crystallized in anatase and rutile phases, due to different calcination temperatures. In addition to this result at temperatures above 600 ℃, the Titanium dioxide nanopowder has been crystallized as rutile. The crystalline structure of titanium dioxide nanopowder changed because of different calcination temperatures and time applied. The average particle size of the powder dried in the air was larger than the powder dried in the oven. The minimum particle size of the powder which dried in the air was 50 nm and in the oven, drying was 9 nm observed and calculated by both scanning electron microscope and William son-Hall equation. All in all, with overall increasing of calcination time and temperature the grain size increased. Moreover, in the case of temperature, after a certain temperature grain size became constant and didn’t have significant changing above that. |
| Keywords: |
| Keywords: Titanium isopropoxide, Nano-TiO2 powder, air drying, Oven drying, particle size |
| Status : Paper Accepted (Poster Presentation) |
