. 2016 May 21;11:259. doi: 10.1186/s11671-016-1472-z

Table 1.

Effect of calcination temperature on the size of alumina in the presence of additives

Calcination temperature (°C)	600	800	1050	1200
Al₂O₃ crystal type	Amorphous Al₂O₃	γ-Al₂O₃	α-Al₂O₃	α-Al₂O₃
Grain size (nm)	–	5~50	10~100	≥100
Color of Al₂O₃	Light yellow	White	White	White