| 摘要 |
PURPOSE:To obtain a carbide having high strength in high yield by previously oxidizing a plant before carbonization of plant to prevent the formation of low-molecular weight substances resulting from rapid and extreme decomposition of the plant, successively heating and carbonizing the plant in a gas flow under a nonoxidizing atmosphere. CONSTITUTION:For example, flowers (small branches or leaves) of rose, Camellia sasanqua Thunb., or rose of Sharon or fruits of Japanese chestnut with bur are dried. The dried plants are previously oxidized at 200-300 deg.C, heated in a gas flow under a nonoxidizing atmosphere using a gas of N2 gas, Ar gas or H2 gas and carbonized to give a carbide of plant. This method provides a carbide having excellent strength in a relatively high yield, extremely shortens a carbonization time and shows excellent productivity. Since plants are carbonized in the gas flow, air is not fed into a container, will not cause oxidation, the decomposition products are discharged out of the container and clean surface of the carbide can be maintained. |
