Micropump with TiNi Shape Memory Diaphragm Actuator
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概要
- 論文の詳細を見る
We fabricated a micropump with a circular actuator of shape memory alloy (SMA) diaphragm. The actuator consisted of a TiNi diaphragm of 5mm in diameter and 6μm in thickness, and a glass cap. This was fabricated through a process sequence of Si isotropic etching, flash evaporation of the TiNi thin film, annealing for shape memorization, removing of the undesired Si layer by reactive ion etching, and anodic bonding of the glass cap to the diaphragm structure. The fabricated actuator gave about 90μm displacement at the center of the diaphragm under a bias pressure of 200kPa. The SMA micropump, which was completed by gluing the Si check valve with a cantilever valve flap to the actuator, gave a pumping rate of 3-15μL/min at heating energy of 3-9 J under a bias pressure of 200kPa and at zero back pressure. Experimental data indicate that the fabricated SMA diaphragm is acceptable as an actuator of a micropump, while the fabricated valve structure is insufficient as a check valve for high pressure application due to a leak problem.
- 一般社団法人 表面技術協会の論文
- 2005-12-01
著者
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SHIBATA Takayuki
Department of Physics, University of Tsukuba
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MAKINO Eiji
Faculty of Science and Technology, Hirosaki University
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Shibata Takayuki
Department Of Energy Engineering & Science Faculty Of Engineering Nagoya University
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Shibata Takayuki
Department Of Production Systems Engineering Toyohashi University Of Technology
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MAKINO Eiji
Faculty of Engineering, Hokkaido University
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