Dissertation > Excellent graduate degree dissertation topics show

Forming Research on Al2O3Ceramic Plate Heat Pipe Based on Micro-droplet Jetting

Author: LiuGuiLan
Tutor: ZhangXiangLin
School: Huazhong University of Science and Technology
Course: Materials Processing Engineering
Keywords: Electronic devices cooling Ceramic flat heat pipes MAM free forming Heattransfer performance
CLC: TK172.4
Type: Master's thesis
Year: 2013
Downloads: 7
Quote: 0
Read: Download Dissertation

Abstract


The trend of miniaturization and higher power of electronic device put forwardhigher requirement to the heat dissipation. Micro flat heat pipe has a high thermalconductivity, becoming the main research direction of electronic device cooling.Traditional MHP use metal as material of tube, its processing method is complicated,processing methods, and electronic devices thermal expansion mismatch, so itsapplication is restricted. The MAM （Motor Assisted micro-syringe） free form techniquesimplifies the forming of heat pipes and makes Al2O3ceramic possible to form heat pipe,and the problems of mismatch between heat pipe and the electronic device are solved. Itis the new direction for electronic devices of the integrated packaging. In the research,Al2O3ceramic is used as raw material, MAM free form technique is used to form theAl2O3ceramic plate heat pipe, and the heat transfer performance is studied.In the study, the wick is designed in the first part. The heat transfer performance ofheat pipe is analyzed; the width and depth of the groove are designed. Based on therequirements of MAM free form technique, a support layer with0.35mm in thickness isadded to optimize the structure of wick of heat pipe.The factors which affect the stability of the Al2O3ceramic slurry are studied, thedispersion mechanism is analyzed, and the optimal parameters of the dispersant contentand pH value are obtained. In accordance with the requirements of the forming process,the final formula of A Al2O3ceramic slurry is chosen.In the study of manufacturing process, the best molding process parameters ischosen, based on forming experiments. Analyzing the influences of sintering temperatureon the surface morphology and mechanical properties of ceramic, the best sinteringtemperature is decided. The charging method is set.The heat transfer performance of heat pipe is studied. The testing system is designed;the thermal resistance of the system is analyzed. And the different charging radio and cooling conditions on the heat transfer performance of heat pipe is researched. The resultsshow when the charging radio is100%; the cooling condition is heat sink; thetemperature difference and thermal conductivity of ceramic plate vapor chamber is3.8°Cand1409W/m k, the heat transfer performance is the best.

Related Dissertations

  1. Experimental study on the separation performance of complex heat pipe type heat pipe and two phase flow,TK172.4
  2. Research on Cooling Method of Electronics Based on Jet Impingement,TK124
  3. Development and Investigation on Heat Transfer Performance of Thermosiphon Pipe Array with Non-concentrical Tube,TK124
  4. An Investigation of the Frictional Pressure Drop of Air-Water Two-Phase Flow in Vertical Helicoidal Coiled Tube,TK172
  5. Research on the Failureanalysis of Plate Heat Exchanger,TK172
  6. Experimental study of complex performance of heat pipe system,TK172.4
  7. Performance Study and Structural Optimization on Heat Exchanger with Helical Baffles,TK172
  8. The Optimal Design of Plate-fin Heat Exchanger by Simulated Annealing Algorithm,TK172
  9. Technology Development and Enhanced Heat Transfer Effect Evaluation of Surface Modification in Gravity Heat Pipe,TK172.4
  10. Preparation of Electroless Plating on Heat Transfer Surface with Low Surface Free Energy and Study on Their Anti-fouling Property,TK172
  11. Study on Heat Transfer and Fluid Flow Properties in Shell-side of New Longitudinal-flow Heat Exchanger,TK172
  12. Heat Transfer Performance Research on the Intercooler of Alternating Curved Tube Heat Exchanger,TK172
  13. Study of Design Method and Numerical Simulation for Shell-and-Tube Heat Exchanger,TK172
  14. The Study of Finned Tube Heat Exchanger’s Computer Aided Design Pllatform,TK172
  15. Design and Fabrication of Micro-hotplate Based on MEMS Technology,TK172
  16. Performance Study on a New Type Evaporator with Multi-Separation Chamber and Double Tube Pass Heater,TK172
  17. Study on Performance of Heat Exchange and Optimized Design of Structure for Exhaust Cooler of Stirling Engine,TK172
  18. Research on the Performance of Telecommunication Base Station with Separate Heat Pipe,TK172.4
  19. Ultrasonic-Pulsed Electric Field Preventing the Scale in Heat Exchange Equipment,TK172
  20. Fabrication of Biporous Wick and Its Application in Loop Heat Pipe,TK172.4
  21. Preliminary Experimental Study on the Single-tube and the Single-sheet of Water Film Evaporative Air Cooler,TK172

CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Industrial thermal equipment > Heat Transfer Equipment > Heat pipe
© 2012 www.DissertationTopic.Net  Mobile