Refractory Materials are usually non-metallic materials having those chemical and physical properties that make them applicable for structures, or as components of systems, that are exposed to environments above 1,000 °F (811 K; 538 °C)。

Fused quartz

Main Specs:
SiO2: 99.8% min
Fe2O3: 100 ppm max
AI2O3: 300 ppm max
Na2O: 50 ppm max
K2O: 50 ppm max

Size: coarse grade range: 0.2-0.5 mm, 0.5-1 mm, 1-2 mm 2-5 mm, 10-100 mm

fine grade range: 0-0.2 mm, -200 mesh, -325 mesh, D50=8 mm