Abstract
We developed a new carbon composite board by adhering carbonized powders with superfine natural fibers as binder. We examined the effect of covering B2O3 on the fire-retardant property of the board, and boron oxide was smeared on the surface of the carbon composite board. The Cone Calorimeter method, which is in conformity to ISO-5660, was adopted as the measurement of the fire retardant property, the heat release rate, the total heat release, smoke production rate and total smoke. In the sample covered with B2O3, the total heat released decreased to below 8.0MJ/m2. These results indicate that the carbon composite board with B2O3 treatment is ranked as the fire-retardant material. When carbon composite board treated covering B2O3 in the process of early burning, surface of the board was burned and became the char. The char on the board recognized that inhibit emission of combustive gas from the board and blocks oxygenation on the surface of the board.
