ZIRCHROM HER

Range
Sintered
Subtitle

Sintered 30% chrome-alumina

Description

High electrical resistivity. Good corrosion and thermal shock resistance.

Chemical and physical properties

Microstructure

Image
ZIRCHROM HER microstructure

Typical chemical composition

 
 

Typical crystallographic analysis

  • Cr2O3-Al2O3 solid solution
  • Corundum

Physical characteristics

Description International standards British standards
Cold crushing strength 80MPa 11,603psi
Coefficient of thermal expansion at 1,000°C 8.3 10-6°C 4.6 10-6°F-1
Thermal conductivity at 1,000°C 2.79 W.m-1.K-1

19.4 BTU
in hr-1ft-2°F-1

Electrical resistivity at 1,300°C 700ohm.cm 1,778ohm.inch
Open porosity 19% 19%
Typical bulk density 3.35g/cm3 209pcf

Typical application

ZIRCHROM HER is dedicated to electrode blocks application for insulation glass furnaces. The high electrical resistivity combined with good thermal conductivity and good thermal shock resistance allow higher level of electrical boosting.

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