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List of Physical Characteristic Parameters of Ceramic Cylinder Sleeves

Material item	Aluminum oxide	ZTA	Zirconia
Volume density(g/cm3)	3.9	4.17	6.0
Vickers hardness(GPa)	13	12	11
Bending strength(MPa)	350	480	800
Fracture tenacity(MPa.m1/2)	4	5	9
Young's modulus(GPa)	370	330	200
Abrasion resistance(min/cm3)	15	35	40
Linear expansion coefficient(40-800ºC)(×10-6/ºC)	8.0	8.8	11.0
Roughness(Ra)(μm)	0.3	0.2	0.1
Acid resistant(95%sulfuric acid,95ºC)(WT Loss,mg/cm2.d)	0.25	0.2	0.04
Alkali resistance(30%caustic sodium,80ºC)(WT Loss,mg/cm2.d)	0.05	0.06	0.08

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