Ceramic roller

Performance index CK767 CK745 CK750 CK720 Al2O3+ZrO2(%) 78-80 76-78 74-76 72-74 Apparent porosity (%) 17-21 18-22 18-22 18-22 Water absorption(%) 7.9-9.0 7.5-9.5 8.0-10.0 8.0-10.0 Density(g/cm3) 2.55-2.65 2.50-2.60 2.45-2.55 2.40-2.45 Bending strength(Mpa) >60 55-60 50-55 45-50 (13500-20℃) Very good Very good Very good Very good Thermal shock resistance Maximum working 1350 1300 1250 1180 temperature(℃) Refractoriness under load 1580 1560 1550 1530 (℃)(0.2Mpa) Coefficient of thermal 5.7 5.6 5.5 5.3

expansion (X10-6/℃) (25～1000℃) Linearity(mm) ≤0.07% ≤0.07% ≤0.07% ≤0.07% Outer diameter deviation(mm) ≥φ50:+0.3 -0.7