High Precision 0.3mm-100mm Hard Precision Ball Alumina Ceramic Ball for Bearing

• Application: Industrial Ceramic
• Type: Ceramic Ball, Ceramic Balls
• Material: Alumina Ceramic
• Transport Package: Wooden Box
• Specification: 0.5-100mm
• Trademark: SHANGTAO
• Origin: China

Product Description

Aluminum Oxide Precision Ball Physical Properties
AL2O3 conent %	60	75	85	95	99	99.7
Bulk density(g/cm^3)	3	3.1	3.4	3.7	3.81	3.85
Flexural Strength(MPa)	205	280	230	304	340	370
Coefficient of linear expansion(×10^-6/ºC)(25-800ºC)	7.1	7.6	7.6	7.3	7.6	7.6
Thermal conductivity[w/(m.R)]	16	17	17	20	34	35
Insulated strength(KV/mm)	10	10	10	10	10	10
Bulk density resistance(Ω.cm)20ºC	>10^14	>10^14	>10^14	>10^14	>10^14	>10^14
300ºC	>10^13	>10^13	>10^13	>10^12	>10^10	>10^10
Long term operating temperature (ºC)	1350	1000	1290	1480	1600	1700
Hardness	7.5	7.5	7.5	8.8	9	9
Refractoriness	1800	1700	1850	2000	2030	2040

Product Characteristics of Aluminum Oxide Precision Ball

1.Dense without pores.
2.Large inventory of alumina balls.
3.Non standard sizes/diameters/specifications are available.
4.The toughness of alumina balls is relatively low.
5.Compared to silicon nitride balls, alumina balls are more suitable for use in situations with lower cost requirements.

Aluminum oxide ceramic balls are wear-resistant, heat-resistant, antioxidant, resistant to water, salt
solutions, and other chemical and acid corrosion. Additionally, it can maintain dimensional stability up
to 1100 ºC.