diameter tolerance: ΦD+0.2-0.5mm

length tolerance: ±3.0mm

straightness: ≤0.07%·L

roundness: ≤0.5

bulk density: ≥2.5g/cm3

water absorption: 8~12%

flexural strength: >60/40 (25ºC/1300ºC、MPa)

coefficietofthermal expansion: 5.5~6.2×10-6(25~1000ºC)

working temperature: 1250ºC

chemical composion: Al2O3+ZrO2: ≥76%, SiO2: ≥22%,K2O+Na2O: ≤0.55%