1997 Fiscal Year Final Research Report Summary
DEVELOPMENT OF NEW FLOATING ZONE APPARATUS WITH DOUGHNUT STYLE ELLIPSOIDAL MIRROR
| Project/Area Number |
07555273
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
無機工業化学
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| Research Institution | YAMANASHI UNIVERSITY |
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Principal Investigator |
KOJIMA Hironao YAMANASHI UNIV., FACULTY OF ENGINEERING PROFESSOR, 工学部, 教授 (90020346)
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| Co-Investigator(Kenkyū-buntansha) |
WATAUCHI Satoshi YAMANASHI UNIV., FACULTY OF ENGINEERING RESEARCH ASSOCIATE, 工学部, 助手 (30293442)
TANAKA Isao YAMANASHI UNIV., FACULTY OF ENGINEERING ASSOCIATE PROFESSOR, 工学部, 助教授 (40155114)
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| Project Period (FY) |
1995 – 1997
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| Keywords | FLOATING ZONE / INFRARED HEATING FURNACE / DOUGHNUT STYLE |
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| Research Abstract |
New floating zone apparatus with a doughnut style ellipsoidal mirror was designed and produced to uniform temperature distribution along the horizontal direction for growth of perfect superconducting oxide crystals. To design the doughnut style ellipsoidal mirror, the optimum shape of the mirror was determined to be 120 mm of the long axis, 96 mm of the short axis and 144 mm of the focus distance by computer-simulation. The mirror was produced experimentally from a specia aluminum alloy, and the surface inside the mirror was gold-coated to reflect the infrared lay effectively from the heat source. Also the semicircular halogen lamps to be adjusted in the mirror were designed and produced experimentally. The horizontal distribution and vertical gradient of temperature in the new apparatus were remarkable uniform and slow as compared with the commercial infrared heating apparatus.
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