Zircar Zirconia ZG Low Mass Zirconia Grog

Subcategory: Oxide, Zirconium; Oxide

Key Words: ZrO2, zirconium oxide

Material Notes:
Zircar Zirconia Low Mass Grog Type ZG is high fired, fibrous yttria-stabilized zirconia particles, ideally suited for thermal insulation under conditions of ultra high temperatures. Type ZG exhibits exceptional resistance to oxidizing and reducing atmospheres at high temperatures. Zirconia, however, loses a small amount of oxygen in inert and reducing atmospheres and in vacuum at very high temperatures. This results in a color change from white to gray; while most other properties remain essentially unchanged and the insulation effectiveness is not impaired. Type ZG Grog offers lower thermal conductivity and specific heat than conventional dense grogs. This makes it useful for crystal growth and glass melting furnace insulation applications.

Type ZG contains no organic binders and will produce no smoke or odor when heated. ZG Grog will conduct electricity at elevated temperatures. Type ZG Grog is available in two standard particle size ranges.

• Type ZG-1 has a Tyler mesh size of -3 1/2 to +8 (5.7mm to 2.4mm)
• Type ZG-2 has a Tyler mesh size of -8 to +14 (2.4mm to 1.2mm).

Features:

• High Temperature Stability to 2200°C
• Low Thermal Conductivity
• Highly Refractory
• Excellent Thermal Shock Resistance
• No Outgassing
• Two Particle Size Ranges are Offered
• Available ‘Off the Shelf’

Application Information:

• ZG Grog is used as insulation and crucible support in crystal growing furnaces.
• ZG Grog is used as insulation for glass melting furnaces.
• ZG Grog is used as bulk fill insulation.

Information provided by Zircar Zirconia.