Calcined Alumina - Fine Powder

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Calcined Alumina - Fine 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		HJM-7	HJM-8	HJM-10	HJM-15	HJM-20	HJM-25	HJ-80	HJ-90
Chemical constituent	Al(OH)₃ [%] ≥	99.5	99.5	99.5	99.5	99.5	99.5	99.5	99.5
	Al₂O₃ [%] ≥	64.5	64.5	64.5	64.5	64.5	64.5	64.5	64.5
	SiO₂ [%] ≤	0.02	0.02	0.02	0.02	0.02	0.02	0.02	0.02
	Fe₂O₃ [%] ≤	0.01	0.01	0.01	0.01	0.01	0.01	0.01	0.01
	Na₂O [%] ≤	0.30	0.30	0.30	0.30	0.30	0.30	0.30	0.30
	Loss on ignition ≤	35.0	35.0	35.0	35.0	35.0	35.0	35.0	35.0
	Attached water ≤	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
	+325 mesh 325mesh≤	0.01	0.01	0.1	15	25	-	-	-
	oil absorption ≈	27	26	26	22	21	17	20	20
Mean particle diameter （D50） µ m ≈		7	9	10	15	20	25	80	90
Whiteness [R457] ≥		95	94	94	93	91	90	85	85
PH value ≈		9