제품소개 ?몃씪誘뱀젣??D_name=PROPERTY

?몃씪誘뱀젣??D_name=PROPERTY

    MATERIAL  
      ITEM
    DW-
    700
    DW-
    900
    DW-
    960
    DW-
    998
    DW-P DW-Z
    Chemical Composition Al2O3 70% Al2O3 90% Al2O3 96% Al2O3 99.8% Al2O3- SiO2 ZIRCONIA
    Color White White White Ivory White Ivory
    Specific Gravity 2.9 3.6 3.7 3.9 2.4 6
    Water Absorption(%) 0 0 0 0 0 0
    Mechanical
    Characteristics
    Hardeness MOHS - 9.0 9.0 9.0 - -
    Rockwell HRA - 76 78 83 - 81
    KNOOP GPa 1 10.8 11.1 14.7 - 12.7
    Compressive Strength
    (㎏/㎠)
    16,000 20,000 24,000 26,600 2,000 25,500
    Bending Strength (㎏/㎠) 3.500 5,000 5,500 5,800 1,200 12,000
    Tensile Strength (㎏/㎠) - 1,900 2,000 2,600 - -
    Thermal Characteristics Safe Service Temparature (℃) 1,200 1,500 1,600 1,650 1,100 2,000
    Thermal Conductivity
    (㎈/㎝.sec.℃)
    0.01 0.04 0.06 0.08 0.003 0.0045
    Coefficient
    of Thermal
    Expansion
    20~500℃
    ×10-6
    5.8 7.1 7.3 7.5 - 9.8
    20~800℃
    ×10-6
    6.2 7.5 8.0 8.4 - 10.1
    20~1000℃
    ×10-6
    6.5 7.8 8.4 8.6 - 10.3
    Electrical Characteristics Dielectric Constant (㎒/s) 7.5 8.8 9.4 9.9 6.0 29.0
    Dielectric Strength (㎸/㎜) 12 12 11 12 10 9.0
    Volume Resistance
    (Ω.㎝)
    25 Ω℃ 1014 1014 1014 1014 1012 1013
    30 Ω℃ 1010 1012 1013 1014 106 107
    500 Ω℃ 108 1010 1010 1010 - 104