Zircon

  • Naturally occurring refractory mineral and is therefore subject to variability

  • Chemically inert

  • Stable to very high temperatures

  • Very high thermal conductivity

  • Acts as a chill to eliminate metal mold reactions and burn-in, resulting in a smooth cast surface

  • Available in both granular and flour form

  • High density provides excellent flow characteristics in a primary slurry

  • Round grains do not cause defects such as rough casting surfaces

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