| 摘要 |
PROBLEM TO BE SOLVED: To provide an ion generator installed in an intake route or a fuel route of an internal combustion engine. SOLUTION: A member which ionized powder is applied on or mixed in is sealed in a heat resistant sack body and is formed in a belt shape or a plate shape. First roast in which fine-grained material eggshell is put in a roast furnace, temperature in the furnace is kept at about 1000°C, the eggshell is roasted by direct fire at about 1300°C under excess air condition, and the eggshell is mixed well is performed until organic matter of the material eggshell burns and color of the eggshell turns to dark red. The eggshell after first roast is subjected to second roast for two to three hours until color of the eggshell turns to bright red or yellowish red by direct fire at 1300-1500°C in the roast furnace where temperature is kept 1300°C or higher. The eggshell left in atmospheric temperature for at least 3 hours is subjected to third roast for about two hours till oxygen group and hydroxide group is removed and color turns to shiny white or diamond color by direct fire at 1300-1500°C. Cooled eggshell after third roast is fine-grained to form the ionized powder. COPYRIGHT: (C)2007,JPO&INPIT
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