Super light weight ceramic panel and process for preparing the same
AssigneeLG Chem, Ltd.
InventorSang-Ho Shin
Life of this patent
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Abstract
A super lightweight ceramic panel for a non-bearing wall utilizing an expandable clay mineral and a process for preparing the same are provided. The super lightweight ceramic panel is comprised of a clay composition containing 90 to 98% by weight of an expandable clay mineral, 1.5 to 5% by weight of a flux (glass), and 0.5 to 5% by weight of silicon carbide, and is prepared by mixing and pressing the clay composition, followed by firing at a temperature of 1100 to 1200° C. The super lightweight ceramic panel in accordance with the present invention is a material having a light weight and exhibiting improvement in physical properties such as water resistance, flame retardancy, heat insulation and rigidity, via formation of closed pores inside the ceramic material.
Claims12
A super light weight ceramic panel comprising a multiplicity of closed pore structures produced by trapping carbon dioxide gas generated via oxidation of silicon carbide and oxygen gas generated via reduction of iron oxide within a vitreous phase produced by expandable clay mineral and glass,
- wherein the ceramic panel, is made of a composition, consisting of 90 to 98% by weight of an expandable clay mineral, 1 to 5% by weight of glass, and 1 to 5% by weight of silicon carbide, and
- wherein the expandable clay mineral consists of 61.5 to 70% by weight of SiO2, 15 to 20% by weight of Al2O3, 1 to 5% by weight of Fe2O3, 2 to 4% by weight of CaO, 1 to 3% by weight of MgO, 0.5 to 1.5% by weight of K2O and 2 to 5% by weight of Na2O,
- wherein the closed pore has a pore density of 343 to 1000 pores/cm3, and
- wherein the closed pore has a pore volume of 74 to 89%, relative to the total volume of the panel.
Dependencies are inferred from the claim text.