Porcelain

Material Properties

Porcelain classic shaped crucibles in high, medium and low form, glazed on the inside and out, except on the bottom. Withstands temperature to 1150°C (2102°F).

Chemical%
SiO254.48
Al2O334.48
Fe2O30.15
CaO0.47
MgO1.68
K2O3.5
Na2O0.79
Others4.45
  • DATA MEASUREMENTS – All data measurements are typical and made at room temperature unless otherwise noted.
  • THERMAL SHOCK RESISTANCE – Tests are run by quenching samples into water from various elevated temperatures. The change in temperature where a sharp decrease in flexural strength is observed is listed as ‘delta Tc’.
  • CHEMICAL RESISTANCE – Although all alumina and zirconia ceramics are highly resistant to chemical attack, it is recommended that specific applications are discussed with Almath Crucibles to ensure optimum ceramic selection.
PropertyUnit
Acid Resistance> 99.98%
Alkali Resistance> 97%
Temperature Resistance1. For glazed type: 1050°C
2. For unglazed type: 1380°C
Wear Resistance< 0.03g/cm3
Moh’s Hardness7 grade
Water Absorption Rate< 0.5%
Bulk Density2.2-2.7g/cm3
Compressive Strength> 300 MPa
Breaking Strength> 40 MPa
Thermal Stability1400°C to ambient temperature

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