Sökning: "lena klintberg"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden lena klintberg.

1. 1. Miniature Phase-Transistion Actuators

   Författare :Lena Klintberg; Lars Montelius; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

   Sammanfattning : Clearly, there is a need for simple, strong actuators capable of large strokes in miniaturized systems such as valves and optical shutters.The basis for this work is the microstructure technology with processing techniques adopted from the integrated circuit industry. LÄS MER

3. 2. Microfluidics at High Pressures : Understanding, Sensing, and Control

   Författare :Martin Andersson; Lena Klintberg; Cyril Aymonier; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-pressure microfluidics; supercritical CO2; compressible flow; relative permittivity; integrated electrodes; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

   Sammanfattning : This thesis explores understanding, sensing, and control in high-pressure microfluidics. The high-pressure regime allows fluids to be forced through narrow channels at substantial speed and creates conditions for fluids of high density and low viscosity—features desired in flow-based chemical analyses. LÄS MER

4. 3. Extending Microsystems to Very High Temperatures and Chemically Harsh Environments

   Författare :Zahra Khaji; Lena Klintberg; Klas Hjort; Greger Thornell; Frank Niklaus; Uppsala universitet; []
   Nyckelord :HTCC; MEMS; MST; Microcombustor; Microthruster; Single-use valve; Wireless pressure sensor; flow sensor; in-situ electroplating; Monopropellant; Platinum; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

   Sammanfattning : Aiming at applications in space exploration as well as for monitoring natural hazards, this thesis focuses on understanding and overcoming the challenges of extending the applicability of microsystems to temperatures above 600°C as well as chemically harsh environments. Alumina and zirconia high-temperature co-fired ceramics (HTCC) with platinum as the conductor material, have in this thesis, been used to manufacture a wide range of high-temperature tolerant miniaturized sensors and actuators, including pressure and flow sensors, valves, a combustor, and liquid monopropellant microthrusters. LÄS MER

5. 4. Microsystems for Harsh Environments

   Författare :Stefan Knaust; Lena Klintberg; Klas Hjort; Fredric Ericson; Samuel Marre; Uppsala universitet; []
   Nyckelord :Microsystems; harsh environments; high pressures; high temperatures; supercritical microfluidics; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

   Sammanfattning : When operating microsystems in harsh environments, many conventionally used techniques are limiting. Further, depending on if the demands arise from the environment or the conditions inside the system, different approaches have to be used. LÄS MER

7. 5. High-Temperature Microfluidics for Space Propulsion

   Författare :Ville Lekholm; Klas Hjort; Anders Persson; Lena Klintberg; Herbert Shea; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

   Sammanfattning : In this thesis, microfabrication methods and tools for analysis of heated cold-gas microthrusters are presented, with the aim of improving their reliability and performance. Cold-gas thrusters operate by accelerating pressurized gas through a nozzle. LÄS MER