CZ4

Range
Expendables
Subtitle

Zircon material

Description

CZ4 is a fine grain zircon-based refractory material. It is used mainly as orifice rings for the manufacturing of borosilicate glass and other special glasses.

Chemical and physical properties

Typical chemical composition

 
 

Typical crystallographic analysis

Main phase: 

  • zircon

Secondary phase:

  • monoclinic zirconia
  • silicate

Physical characteristics

Description International standards British standards
Refractoriness under load 2 105Pa,
0.5% at
1,520°C 2,768°C
Cold crushing strength 90MPa 13,053psi
Coefficient of thermal expansion  5 10-6K-1 2.7 10-6°F-1
Thermal conductivity at 1,000°C 2.2 W.m-1.K-1 12.25 BTU in hr-1ft-2°F-1
Porosity 16.5% 16.5%
Typical bulk density for orifice rings 3.8g/cm3 237pcf

Typical application

CZ4 is used for orifice rings.

  • Special glasses
  • Opal glass
  • Crystal

Related products

Sintered
Expendables

CZ66

Sintered zircon with 66% zirconia

Premium zirconium silicate. Very high resistance to vapours corrosion and very good glass contact properties for specialty glass expendables.

Expendables

ZIRAL 61

Bonded AZS with 20% zirconia

ZIRAL 61 is recommended for all applications in feeder expendables, and for superstructures where high corrosion resistance is required.