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name	Unit Measurement	Smooth stone ceramic	95-97ceramic	99ceramic	99.7ceramic	Black titanium ceramic	Yellow titanium ceramic	zirconium oxide ceramic
materials		Smooth stone	AL₂O₃ 95-97	AL₂O₃ ≥99%	AL₂O₃ ≥99%	TIO₂≥95%	TIO₂≥95%	ZRO₂94.5%
colour		white	red、black、ivory white、pink、light pink、white	red、pink、ivory white、light pink、white Ivory white、light	pink	black	yellow	Ivory white
density	G/cm3	2.7	3.7	3.85	3.9	4	4	6
Flexibility	Mpa	150	300	340	390	70	70
Compressive strength	Mpa	900	3400	3600	3900	600	600
Wustite hardness	HV0.5		1800	1900	2000	900	900	1800
Air hole appearing rate	%	0	0	0	0	0	0	0

Superficial treatment types	Surface roughness
General polishing	0.8um-1um
Ordinary refined polishing	0.2um-0.3um
Special refined polishing	≤0.1um