Patent ID: 6710001
Filing Date: 2004-03-23
Classification: C03C,C04B,Y02W

Abstract:
A porous sintered body containing 20-60 weight % of Al2O3, 18-60 weight % of SiO2, 1-30 weight % of a sum of CaO, SrO, BaO, and MgO, and 0.5-15 weight % of B2O3, whereina leaching amount of Cd is 0.01 mg/l or less; a leaching amount of Pb is 0.01 mg/l or less; a leaching amount of As is 0.01 mg/l or less; a leaching amount of Se is 0.01 mg/l or less; a leaching amount of Cr+6 is 0.05 mg/l or less ; and a leaching amount of total Hg is 0.0005 mg/l or less; the above amounts being measured according to Environmental Quality Standards (EQS) for soil pollution by Japanese Ministry of the Environment.