| 摘要 |
PROBLEM TO BE SOLVED: To reduce the size of a microwave continuous furnace and enhance the reliability thereof. SOLUTION: This microwave continuous furnace has a tunnel 3, made up by alternately providing a plurality of times, polarizing filters each made up of a group of needles 17 and radio wave absorbing bodies 21, 22, and the radio wave absorbing body 21 has absorptivity lowered with a temperature rise, while the radio wave absorbing body 22 has absorptivity increased conversely. Because no water is used, a small-sized, continuous furnace of high-reliability microwave can be realized capable of being installed in any place, dispensing with water bills, and needing no scale-related maintenance.
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