White Calcinated Aluminum Oxide Powder

GRADE WCA

Background

White Calcinated Alumina (Al2O3, also known as Alumina and White Aluminum Oxide powders) is extremely soft, friable, sharp abrasive, similar to brown aluminum oxide and has a very low iron content. WCA has lower hardness and abrasive capacity than fused aluminum oxides.

Applications

WCA is perfect material for polishing of glass, quartz, semiconductor materials such as silicon, sapphire, gallium arsenide and cadmium telluride). WCA is widely used for grinding ferrous materials, finishing tough and hard materials, making ceramic parts when the processing cost is important.

Technical data

Typical Chemical Data

Aluminum Oxide :		99.80 (typ.)
Silica:		0.01-0.05 %
Iron Oxide:		0.01-0.03 %
Calcium Oxide:		0.01 - 0.03 %
Na2O		0.01 – 0.10

Typical Physical data

Structure :		Monocrystalline
Particle shape:		Blocky, sharp edged
Color:		White
Friability:		Friable
Moh’s Scale:		9
Maximum working temperature:		1650ºF
Density (g/cc):		3.80

Particle size distribution for available grits
Grading: FEPA Standard

Grit size	3% max., larger than, um	50% min., in size range, um	94% min., larger than, um	Grit size	3% max., larger than, um	50% min., in size range, um	94% min., larger than, um
F12	2000	N/A	1400	F120	125	N/A	90
F14	1700	N/A	1180	F150	106	N/A	63
F16	1400	N/A	1000	F180	90	N/A	53
F20	1180	N/A	850	F220	75	50.0-56.0	45
F24	850	N/A	600	F240	70	42.5-46.5	28
F30	710	N/A	500	F280	59	35.0-38.0	22
F36	600	N/A	425	F320	49	27.7-30.7	16.5
F40	500	N/A	355	F360	40	21.3-24.3	12
F46	425	N/A	300	F400	32	16.3-18.3	8
F54	355	N/A	250	F500	25	11.8-13.8	5
F60	300	N/A	212	F600	19	8.3-10.3	3
F70	250	N/A	180	F800	14	5.5-7.5	2
F80	212	N/A	150	F1000	10	3.7-5.3	1
F90	180	N/A	125	F1200	7	2.5-3.5	1
F100	150	N/A	106

Note: ANSI graded, custom graded and ungraded powder is available on request