Grinding Media Selection Criteria

PROPERTIES	UNITS	Aluminum Oxide					Zircon	Zirconia
		P70	P87	P90	P96	P99	Zarsil®	CeZrO₂
Bulk Density (ASTM-C20-87)	Kg/M3 lbs/ft3 g/cc	2350 146.6 2.35	3500 218.3 3.50	3600 224.5 3.60	3769 235.1 3.77	3941 245.8 3.94	4020 250.7 4.02	6000 374.2 6.00
Apparent Porosity (ASTM-C20-87)	%	0	0	0	0	0	0	0
Flexural Strength (ASTM-C674-88)	MPa Kpsi	89.6 13	275.8 40	334.4 48.5	365.4 53	386.1 56	162.0 23.5	806.7 117
Elastic Modulus (ASTM-C674-88)	GPa MPsi	81.0 11.6	174.6 25	190.0 27.2	209.6 30	265.4 38	78.9 11.3	230.5 33
Compressive Strength (ASTM-C773-88)	MPa Kpsi	482.7 70	1723.8 250	1461.7 212	1813.4 263	1909.9 277	1579.0 229	2440.8 354
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 lbs./ft³	1457 90.9	2170 135.3	2232 139.2	2336.8 145.7	2443.4 152.4	2492.4 155.5	3720 232.0

Inches	Millimeters	P70	P87	P90	P96	P99	Zarsil	CeZrO₂
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

Inches	Millimeters	P87	P90	P96	P99	Zarsil	CeZrO₂
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