| Project/Area Number |
09555018
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Applied physics, general
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| Research Institution | IWATE UNIVERSITY |
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Principal Investigator |
IKEBE Manabu IWATE UNIV. Facul. Eng. Professor, 工学部, 教授 (40005955)
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| Co-Investigator(Kenkyū-buntansha) |
FUJISHIRO Hiroyuki IWATE UNIV. Facul. Eng. Associate Prof., 工学部, 助教授 (90199315)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,300,000 (Direct Cost: ¥2,300,000)
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| Keywords | Anisotropic materials / Thermal Conductivity / Thermal Diffusivity / Specific heat / Contact thermal resistance / Low temperature / Identical experimental setup / 完全自動計測技術 |
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| Research Abstract |
In the field of low temperature physics and cryogenic engineerings, there are many structurally anisotropic materials (e.g ; high temperature superconductors, fiber reinforced plastics (FRPs)), in which the physical properties such as electrical resistivity and thermal conductivity show an anisotropic nature. We proposed a new technique of anisotropic thermal conductivity (Kx, ky) measurements for two-dimensional anisotropic materials under an identical and spontaneous experimental setup, and also verified the justice of this method from 200K to 10K. The heat current (Q) was diaginally applied to the two-dimensional anisotropic materials from the thin film resistance heater and the temperature at several measuring points was monitored. The change of temperature (△T) after applying Q at each point was compared with the change of the calculated one (△T') which was calculated by solving the two-dimensional diffusion equation with different anisotropic thermal conductivity ratio (A=ky/kx). This procedure was continued until △T is equal to △T' and the anisotropic thermal conductivity ratio (A=ky/kx) was decided. We applied this method to the YBa2Cu307 high temperature superconductors and FRPS and verified the justice of this method. The contact thermal resistance Rc was also measured by steady state and non steady state method.
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