The sintering temperature effect of Alumina (Al₂O₃) ceramic using the sol-gel method

Aluminum Oxide (Al₂O₃) or alumina nanoceramics were synthesized by sol-gel method. The effect of sintering temperatures on the microscopic properties of alumina has been investigated by X-ray diffraction (XRD), Ultraviolet Visible (UV-Vis), and Particle Size Analyzer (PSA). The XRD result confirms the formation of γ-Al₂O₃ at 600 °C and 800 °C and the formation of α-Al₂O₃ at 1000°C, respectively. The microscopic particle size structure of alumina at 600 °C, 800 °C, and 1000 °C sintering was confirmed at micro size from 236, 370.6, and 754.1 nm, respectively. The UV-Vis result shows the absorption peak of Aluminum Oxide (Al₂O₃) in the range 190 to 230 nm. The result of particle size shows that the sol-gel method of alumina in different sintering temperatures shows the best result of the sintering process at 1000 °C. The optimal result was conducted at a sintering temperature of 1000 °C because it exhibits the α-Al₂O₃ (corundum) phase with very high and visible diffraction peaks. From the data obtained, it is known that the α-Al₂O₃ phase can occur at temperatures above 1000 °C.