A thermally activated paraffin-based actuator for gas-flow control in a satellite electrical propulsion system
2003 (English)In: Sensors and Actuators A-Physical, ISSN 0924-4247, Vol. 105, no 3, 237-246 p.Article in journal (Refereed) Published
Microstructured silicon devices consisting of three inflatable paraffin-filled, corrugated caddies suspended in springs to minimize thermal losses have been fabricated and evaluated with a valve application in mind. The large volume expansion associated with the thermally induced solid-to-liquid phase transition of paraffin is used to activate the caddies’ diaphragms. Theses components all with a thickness of 600 μm and a diameter of 39 mm, but with three different corrugations, have been fabricated with deep reactive etching (DRIE). Whereas the corrugated diaphragms could endure a deflection larger than 50 μm, only strokes of 15 μm on each side were attained when the components were activated. Together with the valve seats proposed, the investigated devices have a potential in electrical propulsion systems for satellites.
Place, publisher, year, edition, pages
2003. Vol. 105, no 3, 237-246 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-89916DOI: 10.1016/S0924-4247(03)00203-6OAI: oai:DiVA.org:uu-89916DiVA: diva2:161776