ZIRCHROM HER
Sintered 30% chrome-alumina
High electrical resistivity. Good corrosion and thermal shock resistance.
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.
Chemical and physical properties
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 |
Electrical resistivity at 1,300°C | 700ohm.cm | 1,778ohm.inch |
Open porosity | 19% | 19% |
Typical bulk density | 3.35g/cm3 | 209pcf |
Storage
The sintered 30% chrome-alumina, ZIRCHROM HER solution must be stored in a dry environment protected from weather conditions.
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