Calcined Alumina - Coarse Powder

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Calcined Alumina - Coarse Powder

Al(OH)₃

CAS NO. 21645-51-2

▎General Properties

Molecular weight	78	Mohs hardness	3
Density g/cm³	2.4	Ratio of refraction	1.58

▎Physical and Chemical Properties

Item/ Model		HJA-1	HJA-2	HJA-3	HJA-4	HJA-5
Chemical constituent	Al₂O₃ [%] ≥	99.5	99.6	99.6	99.7	99.7
	SiO₂ [%] ≤	0.03	0.02	0.02	0.03	0.03
	Fe₂O₃ [%] ≤	0.03	0.02	0.02	0.03	0.03
	Na₂O [%] ≤	0.40	0.20	0.40	0.04	0.04
Conversion rate ≥		90	93	94	95	95
Primary grain size µm ≈		0.7	4	4	0.8	4
Median grain size µm ≈		80	80	80	80	80
Specific gravity g/cm³ ≈		3.90	3.93	3.94	3.95	3.96
Specific surface area m²/g ≈		3	0.6	0.6	2	0.5