| 摘要 |
PURPOSE: A composite ceramics composition comprising Mn-Zn system, and Mo is provided to absorb electromagnetic waves from telecommunication and electric home appliances. CONSTITUTION: The composition is prepared by mixing 50-55wt.% of Fe2O3, 15-20wt.% of Mn-Zn, 5-8wt.% of Ni-Zn, 0.1-0.2wt.% of Cr2O3, 0.15-0.2wt.% of Na2O, 0.1-0.15wt.% of TiO2, 8-10wt.% of ZnO, 3-5wt.% of SiO2, 5-8wt.% of Al2O3, 0.5-1wt.% of CaO, and 3-5wt.% of Mo, followed by adding dispersant, plasticizer and 30wt.% of water. The ceramics electromagnetic absorber is produced by ball-milling the above composition and spray-drying at 700-800deg.C for granulated powder(<=3micrometer); forming; heating to 1400deg.C±2% for 6-8hrs., and holding for 1hr.; cooling to room temperature.
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