Ceramic powder emitting far infrared ray, high-density bio-stone manufactured by using the same and manufacturing method thereof

摘要

Disclosed is a process for manufacturing high-density biostone with ceramic powder emitting a far infrared ray, comprising preparing the ceramic powder by mixing 85~92% by weight of Al₂O₃, 3~7% by weight of SiO₂, 3~7% by weight of MgO and 1~4% by weight of clay as major ingredients and ball milling it for 48 hrs; adding 0.6% by weight of dispersants, 1% by weight of wetting agents, 0.6% by weight of glycerin, 20% by weight of binders and 0.5% by weight of anti-forming agents as minor ingredients based on 100% by weight of the ball milled mixture to 35% by weight of water of 60° C., stirring it and adding it to the ball milled mixture; and wet grinding the resulting mixture with ball mill about 24 hrs and spray drying it to obtain a ceramic powder having a diameter of about 60 to 80 meshes; introducing the mixed ceramic powder into a shape of mold and pressurizing and compression molding it with a pressure of 0.8x10³ Kg/cm² to 1.2x10³ Kg/cm² to obtain ceramic forms; and loading the forms an airtight sintering furnace and sintering it at 1580° C. to 1600° C. for 12 hrs under oxidizing atmosphere. The biostone manufactured by such ceramic powders emits far infrared ray emissivity and emission energy suitable for human body, and minimizes and delays a production of oxidation materials as long term thermal oxidation of edible oils and fats when it is used in a cooking procedure using edible oils and fats.