A Revolutionary Inorganic Core and Mold Making Process ...
Feb 18, 2009· The deflection test of a 10x10x50-mm specimen, with a composition of silica sands (60~100 mesh), 2% phenol resin, and 8% silica composition powder. Nano-Silica Coated Sand Composition — Cera-Beads (a mullite product containing artificial spherical sand) of 80-mesh particle size were coated with an organic phenolicurethane no-bake binder ...