| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a new composite material which is provided with an electret characteristic having a potential by the characteristics of a natural ore having a polar crystal structure and a material having a magnetism. <P>SOLUTION: This invention is based on a means to generate an electric potential by the magnetism and the electret function of a composite material which is obtained by mixing a natural ore having a polar crystal structure, a minute powder of other natural ores and shells, crustacea, a minute powder of corals, a carbonaceous material, titanium oxide and carbide, zircon, or a minute powder of a zeolite with a ferrimagnet, a ceramic of an oxide magnetic material, or a minute powder of a soft ferrite. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
