ELECTROMAGNETIC WAVE SHIELDING MATERIAL AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shielding material made from a lignin carbide as the electromagnetic wave shielding material in the lignin carbide as a function material. SOLUTION: When a promoter (aggregation inhibitor) is trially added (Na) by considering a catalytic action mechanism of Ni, a nickel performs an expected catalytic effect in a range of Ni and Na of suitable contents, Lc of the carbide is remarkably developed at this temperature, and the generated carbide has a shielding effect (about 30 db or more) considered usable. The electromagnetic wave shielding material comprises the carbide of the lignin which contains at least one type of element selected from the group consisting of iron series and platinum series or preferably at least one type of element selected from the group consisting of Ni as well as alkali metal and alkali earth metal or preferably Na.