Laminated impregnated type magnetic wood manufacturing methods and magnetic characteristics from DC to 13.5 GHz band

Summary form only given. Since the introduction of magnetic wood, the authors have proposed various functions such as heating, attraction and electromagnetic wave absorption. The impregnated type magnetic wood, which is manufactured by impregnating magnetic fluid through conduit pipes, has the best woody characteristics among the three types of magnetic woods (impregnated type, powder type and coating type). In spite of the merits, the manufacturing methods up until now have been unsuccessful in producing an impregnated type magnetic wood with good magnetic characteristics, because it is difficult to impregnate a sufficient amount of magnetic fluid into the wood board. The purpose of this paper is to suggest a new impregnating method and report on the experimental results of DC and AC magnetic characteristics. The manufacturing method involves taking a thin layer of film from the wood and impregnating this section with a magnetic fluid. Next, these layers are laminated and adhered to create a board. Comparative measurements were made of the specific gravity of the laminated impregnated type and impregnated type magnetic woods. The experimental results for the proposed laminated impregnated type show that uniform magnetic characteristics are obtained and apparently good characteristics are shown from DC to 13.5 GHz.