Patent ID: 7196028

Claim:
A sliding device comprising at least two sliding members respectively having sliding surfaces opposed to each other for creating dynamic pressure in a fluid, characterized in that at least the respective sliding surfaces of the sliding members are formed of ceramics containing crystal grains of Al 2 O 3 , crystal grains of TiC contained in the crystal grains of Al 2 O 3 , and crystal grains of TiC existing independently of the crystal grains of Al 2 O 3 , and having a TiC content of 5 to 20 mass % in the total amount of Al 2 O 3 and TiC, and the volume resistivity value R 1 of the ceramics forming one of the sliding surfaces and the volume resistivity value R 2 of the ceramics forming the other sliding surface are within a range simultaneously satisfying equations (1) to (3): 10 6 Ω·cm< R 1 ≦10 12 Ω·cm (1) 10 6 Ω·cm< R 2 ≦10 12 Ω·cm (2) | R 1 −R 2 |≦10 5 Ω·cm (3.)