Product Details

Specifications

High alumina balls for ceramic grinding media
1.Al2O3>92%,95%
2.Hardness>9
3.Volume density:3.64g/cm3-3.67g/cm3

High Alumina ceramic Ball with High Crush Strength

Feature:

1.high hardness and high density

2.wear resistant

3..high tempreture resistant

rrosion resistant.

Application: The products are widely used as grinding media of ball mill on ceramics, cements, paints, refractories, inorganic mineral powders industries, etc.

material : 99% alumina

data form of different material:

Data&Item	Hight Frequency Ceramic	75%alumina Ceramic	95% alumina Ceramic	99% alumina Ceramic	Titanium Oxide	Zirconia	Mullite
Content	steatite 85%	alumina≥75%	alumina≥95%	alumina≥99%	Titanium Oxide≥90%	Zirconia≥90%	3ALz032si02
Fring temperature(°C)	1350±20	1400-1450	1650-1680	1780-1800	1450±20	1550-1600	1260-1540
Bulk density(fired) (g/cm)	2.8	3.2	≥3.6	≥3.8	≥3.7	>6	3.25
Dielectric Strength(kv/mm)	15	13	15	15		15
Water absorption(%)	<0.02	<0.015	<0.01	<0.01	<0.01	<0.01	<0.01
Compressive Strength	560	2200	2400	3700	7200	5000
Hardness(HRA)	≥75	≥75	≥82	≥88	≥80	≥85	65-70
Volume Resistance (cm) 25°C	≥1012	>1012	>1012	>1012	<1012	>1012	≥1012
Bending Strength(MPA)	126	280	320	400	150	700	180
Thermal Expansion(*10) 25°C-700°C	6-7.5	6	6.2-8.5	6.8-8		9-10	4-4.4
Permittivity(MHZ)	6	5.5	8.5	9.5			7
Roughness(Ra)			≤0.8	≤0.8	<0.1
Mirror Polish			<0.3	≤0.1	≤0.05	≤0.03