Bubble zirconia is a fused, calcia stabilized zirconia which is excellent for refractory applications due to its thermal shock resistance and chemical stability.


  • Used as heat insulation and casting material under high temperatures of 1600°C to 2400°C.
  • Used in high temperature, energy saving down-draft kilns, shuttle kilns, tungsten furnaces, induction furnaces, etc for insulation

Physical Characteristics:

  • Crystal Form: Cubic and Monoclinic mixture
  • True Density: 5.60 – 5.70 g/cm3
  • Hardness: Knoop 1160, Mohs 6.5
  • Melting Point: 2550 °C (4622 °F)
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