CHARCTERISTICS OF CERAMICS


MATERIAL ALUMINA(Al2O3) ZIRCONIA(ZrO2)
99.5% 99.9% Y Type Mg Type
Color White Ivory Ivory Yellow
Density 3.8 3.9 6.0 5.7
Vickers Hardness Load(500g) Kgf/mm2 1700 1750 1250 1100
GPa 16.7 17.2 12.3 10.8
Flexural Strength Kgf/mm2 33 50 100 70
Gpa 323 490 980 686
Compressive Strength Kgf/mm2 240 - 580 -
Mpa 2353 - 5686 -
Young's Modulus of Elasticity X106Kgf/Cm2 3.7 3.9 2.1 2.1
GPa 362 382 206 206
Coefficient of Linear Thermal Expansion
(x10-6/)
40 ~ 400 7.1 7.2 10.5 9.9
40 ~ 800 7.9 8.0 11.0 10.3
Thermal Conductivity(20)
(cal*cm/cm2*sec*)
0.06 0.08 0.009 0.008
Fracture Toughness (MN/m3/2) 3.4 3.4 6.0 11.5
Max. Use Temperature () 1600 1750 200 800
Thermal Shock Resistance 250 250 300 450
482 482 572 842

By Fujikin Incorporated(Japan)