| 摘要 |
PURPOSE: A preparation method of porous ceramic filter, especially, being applied to a water purifier, having filtering and antibacterial effects at a time is provided which simplifies structure of water purifier and improves antibacterial durability by dispersing Ag into ceramic raw materials. CONSTITUTION: The method comprises the steps of: (i) mixing 70-99.9wt.% of ceramic materials composed of one or more of clay, kaolin, feldspar and pottery stone with 0.1-30wt.% of silver salt such as silver acetate, silver carbonate and silver oxalate; (ii) mixing 30-95wt.% of the ceramic materials of step (i) with 5-70wt.% of powdered flammable materials such as carbon compound(graphite, carbon black), hydrocarbon compound(melamine, sugar) and mixture thereof; (iii) forming, drying and sintering at 500-1200deg.C for more than 1hrs. Also, the following Ag-coating step can be added: soaking the ceramic filter silver into salt solution containing 1-20wt.% of Ag+ ions; drying and sintering it at 500-1200deg.C for more than 30min.
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