... seal ring with good wear-resistanting, resistance to elevated temperatures, corrosion resistance, oxidation resistance Our company, Foshan Ceramic Research Institute(FCRI), with ... as shaft bearing ,plunger,sealing matetial and knife, with high density, hardess ,bending strength and breaking tenacity. ... expansion coefficient/°C9.5x10-6Please fell free to contact with us, we will try our best to meet ...