Effects of Different Raw Materials in the Synthesis of Boehmite and γ- and α-Alumina

Table 2

Thermal analyses results.

Sample	TG			DTA
	(°C)	(wt, %)	(wt, %)	(°C)		(µv·min/mg)
AlNa	25–283	18.3	32.1	128	Endo	7.9
	283–475	11.1		377	Endo	0.9
	475–1300	2.7		1024	Exo	0.6
AlB	25–349	11.9	35.8	118	Endo	12.8
		12.9		193	Endo
	349–479	7.2		402	Endo	0.6
	479–1300	3.8		1103	Exo	0.8
AWB	25–168	12.8	40.9	125	Endo	20.8
	168–343	16.8		230	Endo
	343–523	7.9		441	Endo	1.1
	523–1300	3.4		883	Exo	0.4
				1293	Exo	n.d.
AWNa	25–348	16.6	39.1	133	Endo	15.8
		15.1		201
	348–556	5.5		—	—
	556–1300	1.9		811	Exo	0.8
				873
				1280	Exo	n.d.

n.d.: not determined.