CerCo Grinding Medial Selection Criteria

**CerCo** Grinding Media Selection Criteria
			Aluminum Oxide					Zircon			Zirconia
Material Designation			P70	P87	P90	P96	P99	Zarsil®			CeZrO2

Material Properties
PARAMETER	TEST METHOD	UNITS
Bulk Density	ASTM-C20-87	Kg/M³	2350	3500	3600	3769	3941	4020			6000
		lbs/ft³	146.6	218.3	224.5	235.1	245.8	250.7			374.2
		g/cc	2.35	3.50	3.60	3.77	3.94	4.02			6.00
Apparent Porosity	ASTM-C20-87	%	0	0	0	0	0	0			0
		%	0	0	0	0	0	0			0
Flexural Strength	ASTM-C674-88	MPa	89.6	275.8	334.4	365.4	386.1	162.0			806.7
		Kpsi	13	40	48.5	53	56	23.5			117
Elastic Modulus	ASTM-C674-88	GPa	81.0	174.6	190.0	209.6	265.4	78.9			230.5
		MPsi	11.6	25	27.2	30	38	11.3			33
Compressive Strength	ASTM-C773-88	MPa	482.7	1723.8	1461.7	1813.4	1909.9	1579.0			2440.8
		Kpsi	70	250	212	263	277	229			354
Vicker's Hardness	ASTM-E384-89	VHN	590	1190	1136	1400	1848	800			1150

Fracture Toughness	Vickers Indentation	MPa/M²	2	3.3	3.3	3.7	4.3	2.5			8.6

Packing Density		Kg/M³	1457	2170	2232	2336.8	2443.4	2492.4			3720
		lbs./ft³	90.9	135.3	139.2	145.7	152.4	155.5			232.0

**Sphere Diameter Availibility**
Material Designation		P70	P87	P90	P96	P99	Zarsil	CeZrO2
Inches	Millimeters

3/16	4.76		x	x	x	x		x
1/4	6.35	x	x	x	x	x	x	x
5/16	7.94		x	x	x	x		x
3/8	9.53	x	x	x			x
1/2	12.70	x	x	x	x	x	x
3/4	19.05	x	x	x	x	x	x
1	25.40	x	x	x	x	x	x
1-1/4	31.75	x	x	x	x	x	x
1-1/2	38.10	x	x	x	x	x	x
1-3/4	44.45		x	x
2	50.80	x	x	x			x
2-1/2	63.50	x	x	x			x
3	76.20		x

**Cylinder Size Availability**
Material Designation		P70	P87	P90	P96	P99	Zarsil	CeZrO2
Inches	Millimeters

1/4	6.35		x	x	x	x	x	x
3/8	9.53	—	—	—	—	—		x
1/2	12.70		x	x	x	x	x	x
13/16	20.64	—	x	x	x	x	x
1	25.40	—	—	—	—	x		x
1-1/4	31.75	—	x	x	—	—	x
1-1/2	38.10	—	x	—	—	—	x
2	50.80		x				x

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