US20060266979A1 - Ceramic powder emitting far infrared ray ...
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 Al 2 O 3, 3˜7% by weight of SiO 2, 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 ...
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