| 摘要 |
PROBLEM TO BE SOLVED: To shorten the time to reach the capability of ignition to enhance thermal efficiency and prevent fuel from becoming tar by eliminating thermal variations in a vaporizer using a vaporizing element 10. SOLUTION: A vaporizing element 10 is formed of porous alumina ceramics containing 90 weight % or more of alumina and 0.1 to 5 weight % of iron oxide with its mean pore diameter of 0.4 to 200μm.
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