Materials Specification Sheet

LABORATORY WARE PRODUCTS

Materials Designation Alumina 99.8% Aluminium Titanate Magnesium Oxide 97.2% Zirconia
  - Grade HT Grade MT   - Type 1 Type 2
Method of Manufacture SC,DP,CIP SC SC SC SC,DP,CIP SC,DP,CIP
Nominal Composition

a-Al2O3

Al2TiO5

Al2TiO5

  MgO

Ca-ZrO2

Y-TZP

Colour Cream/White White Green   Beige Orange Pearl/White
Density (g/cm3) 3.9 2.9-3.4 3.2-3.8 3.5 4.7 6.0
Water Absorption (%) 0 0-4 0-4   0 3 0
Porosity (vol%) 0 2-12 2-14 - - -
Vickers Hardness (kg/mm2) 1600 - - - - -
Flexural Strength (MPa) 550 20-75 (@20°C) 50-110 (@1100°C) 40-50 (@20°C) 50-80 (@1100°C)   250 650 900
Compressive Strength (MPa) 3700   - - - - -
Fracture Toughness (MPa.m1/2) 4 1-1.5 (@20°C) 2.0-3.0 (@1100°C) 1(@20°C) 3.0 (@1100°C) - 7 13
Young's Modulus (GPa) 380 15-20 15-30 300 200 200
Poisson's Ratio 0.22 0.2 0.2 - - -
Maximum Working Temperature (°C) 1800 1700 1400 >2000 - 2400
Thermal Conductivity (@RT) (W/mK) 38 1.0 (@20°C) 2.0 (@1100°C) 1.0 (@20°C) 2.0 (@1100°C) 3 - 2.2
Coefficient of Thermal Expansion (x10-6/K) 8.4 0.5-3 0.5-2 14 - 10.3
Thermal Shock Resistance (DTc) (°C) 200 1000 1000   - - 350

Legend:

SC - Slip Casting DP - Die(Dry) Pressing CIP - Cold Isostatic Pressing HP - Hot Pressing

NOTE: The above data represent typical values of Rojan's ceramics.

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