Board Fiberfrax Duraboard
Fiberfrax® Duraboard® products are a family of rigid, hightemperature ceramic fiber boards manufactured in a wet forming process using Fiberfrax alumina-silica fibers and binders. All Duraboard products offer low thermal conductivity, high temperature stability, uniform density, and excellent resistance to thermal shock and chemical attack. An exception to this is hydrofluoric, phosphoric, hydrochloric and sulphuric acid and concentrated alkalis. Fiberfrax Duraboard products are also resistant to oxidation and reduction.
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120ZK 120LD 140ZK 140LD 1500 1600 Chemical analysis (%) SiO2 50-58 50-58 52-56 52-56 44-50 37-43 Al2O3 42-50 42-50 28-32 28-32 49-55 56-62 ZrO2 14-18 14-18 Fe2O3 + TiO2 < 0,2 < 0,2 < 0,2 < 0,2 0,5 0,5 other < 0,25 < 0,25 < 0,25 < 0,25 0,25 0,25 Colour cream /white cream /white cream /white cream /white cream /white cream /white Product Melting Point (°C) 1760 1760 1740 1740 Density 390 300 340 300 230 200 Modulus of rupture (kPa) > 800 > 700 > 800 > 700 500 400 Operating temperature (°C) 1200 1200 1400 1400 1500 1600 Loss on ignition (% by weight) < 9 < 7 < 9 < 7 7 7 Thermal conductivity (W/mK) 600 °C 0,13 0,09 0,16 0,15 800 °C 0,16 0,13 0,2 0,2 1000 °C 0,19 0,17 0,26 0,27 0,16 0,18 1200 °C 0,2 0,24 1400 OC 0,26 0,36 Shrinkage (%) 24 Hrs 1200°C < 4 < 4 1400 °C < 4 < 4 1500 °C 4 1600 °C 4
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Thickness 120ZK 120LD 140ZK 140LD 1500 1600 3 + – – – – – 5 + + + – – – 6 + + + – – – 10 + + + – + – 12 + + + – + – 15 + + + – – – 18 + + + – + – 20 + + + + – – 25 + + + + + + 30 + + + + – – 40 + + + + – + 50 + + + + + + Available sheet size
1000x610mm 1250x1000mm