| 摘要 |
PURPOSE: An electromagnetic wave blocking material is prepared which has an excellent effect than metal product and lightweight. CONSTITUTION: Minerals to absorb electromagnetic wave such as black mica, feldspar, quartz, chlorite or amphibole are selected by an electrostatic method. The selected minerals are mixed and crushed to 200-500 mesh of particles. The mineral particles are mixed with water, and molded to give the electromagnetic wave blocking materials.
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