| Project/Area Number |
16560634
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
SASAKI Gen Hiroshima University, GRADUATE SCHOOL OF ENGINEERING, Associate Professor, 大学院・工学研究科, 助教授 (30192595)
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| Co-Investigator(Kenkyū-buntansha) |
YANAGISAWA Osamu Hiroshima University, GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学研究科, 教授 (50034393)
MATSUGI Kazuhiro Hiroshima University, GRADUATE SCHOOL OF ENGINEERING, RESEARCH, 大学院・工学研究科, 助手 (30253115)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2005: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2004: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | ANODIC BONDING / IONIC CONDUCTOR / INTERFACIAL STRUCTUR / ELECTRICAL POTENSIAL / LOW TEMPERTURE BONDING / VAPOR DEPOSITION / ASSEMBLY / ジルコニア / ベータアルミナ / アルミニウム / 銀 / 接合強度 / イオン伝導セラミックス |
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| Research Abstract |
Anodic bonding by lapping metal to ceramics and then applying electric al potential has grate-watched recently on the point of low-temperature bonding, Unfortunately, the effect of applied potential on the microstructure around bonded interface and the diffusion of the elements has still unknown. So that, it has unknown that the anodic bonding is suitable for the assemble technique for sensor and actuator. The aim of this study is to clarify the effect of the bonding conditions on the interfacial structure and to research the possibility for the application use. At first, in order to understand the effect of electrical potential on the atomic diffusion, metal film was evaporated on the ionic conductor and then the effect of the condition of the electrical potential on current density and microstructure were estimated. Ionic conductors used in this study were boro-silicate glass and sodium containing beta alumina Cathode side was glass and beta alumina, and Anode side was aluminum file
… More
side, respectively. As electrical potential with several potential patterns applied to aluminum coated ionic conductor at 523-673K, the change of electric current in aluminum coated glass and beta alumina was measured. Therefore, the electric current increased dramatically on the morrow of applying potential and show the maximum point and then decreased gradually. This phenomena is related with the mobility of sodium ion in ionic conductor quantitatively. As increasing treatment temperature, movable ions increased. But the increment of current density obtund as increasing temperature. From result of EPMA analysis and TEM observation, the content of sodium element decreased as approaching bonded interface, which is sodium depletion layer. This layer shows malignancy for use the sensor. Furthermore, aluminum element diffused in sodium depletion layer. As the sodium contents in glass are more than that in beta aluminum, the total current and the movement of sodium ion in beta aluminum is more than that of glass. Less
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