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Takayuki Honma Yuichiro Kuroki Tomoichiro Okamoto Masasuke Takata Yukihiro Kanechika Masanobu Azuma Hitofumi Taniguchi 《Ceramics International》2008,34(4):943-946
Aluminum nitride ceramics were prepared by sintering with 0–4.8 mass% of Ca3Al2O6 (C3A) as a sintering additive. The transmittance in the range of 260–550 nm increased with increasing amount of C3A. The cathodoluminescence intensity attributed to oxygen-induced defects decreased with increasing amount of C3A. From the results, the increase of the transmittance in the range of 260–550 nm was considered to be related to the decrease of the oxygen-induced defect density. 相似文献
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Toshihiko Hirama Masashi Goto Toshiyasu Hasegawa Minoru Kanechika Takahiro Kei Tsutomu Mieda Hiroshi Abe Katsuki Takiguchi Hiroshi Akiyama 《Nuclear Engineering and Design》2005,235(13):1128
In Japan, the Nuclear Power Engineering Corporation (NUPEC), sponsored by the Ministry of Economy, Trade and Industry (METI), has been conducting a series of seismic reliability proving tests using full-scale or close to full-scale models to simulate actual important equipment that is critical for seismic safety of nuclear power plants. The tests are intended to validate the seismic design and reliability with a sufficient margin even under destructive earthquakes. A series of tests was carried out on a reinforced concrete containment vessel (RCCV) for advanced boiling water reactor (ABWR) from 1992 to 1999. A large-scale high-performance shaking table at Tadotsu Engineering Laboratory, the largest in the world, was used for this test. Part 1 reports the test model and the results of pressure and leak tests. Part 2 describes test procedures, input waves and the results of verification tests such as changes of stiffness, characteristic frequency and damping ratio, the failure of the model and the load deflection. Part 3 shows the seismic safety margin that was evaluated from the energy input during the failure test to a design basis earthquake. Part 4 reports simulation analysis results by a stick model with lumped masses. 相似文献
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Toshihiko Hirama Masashi Goto Minoru Kanechika Tsutomu Mieda Katsuki Takiguchi 《Nuclear Engineering and Design》2005,235(13):1335-1348
In Japan, the Nuclear Power Engineering Corporation (NUPEC), sponsored by the Ministry of Economy, Trade and Industry (METI), has been conducting a series of seismic reliability proving tests using full-scale or close to full-scale models to simulate actual important equipment that is critical for seismic safety of nuclear power plants. The tests are intended to validate the seismic design and reliability with a sufficient margin even under destructive earthquakes. A series of tests was carried out on a reinforced concrete containment vessel (RCCV) for advanced boiling water reactor (ABWR) from 1992 to 1999. A large-scale high-performance shaking table at Tadotsu Engineering Laboratory, the largest in the world, was used for this test. Part 1 reports the test model and the results of pressure and leak tests. Part 2 describes test procedures, input waves and the results of verification tests such as changes of stiffness, characteristic frequency and damping ratio, the failure of the model and the load deflection. Part 3 shows the seismic safety margin that was evaluated from the energy input during the failure test to a design basis earthquake. Part 4 reports simulation analysis results by a stick model with lumped masses. 相似文献
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Kanechika M. Kodama M. Uesugi T. Tadano H. 《Electron Devices, IEEE Transactions on》2005,52(6):1205-1210
This paper presents a concept of silicon-on insulator lateral devices based on a reduced surface field (RESURF) principle by striped trench electrodes formed along the current flow direction. These trench electrodes reduce the electric field at the pn junctions sandwiched between the electrodes. We experimentally applied this RESURF technology to a conventional pn/sup -/ lateral diode. As a result, the breakdown voltage was increased from 56 to 104 V without varying the impurity concentration and the length of the n/sup -/ region. This means that the RESURF effect was achieved with the striped trench electrodes. The LDMOS with this RESURF technology was evaluated by simulations. This would be available for 80-V class lateral MOSFETs, used in the forthcoming 42-V automotive systems. 相似文献
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