Dissertation > Excellent graduate degree dissertation topics show

Research on Processing of the Tungsten Wire for Halogen Lamp

Author: LiuFeiYun
Tutor: CuiJianZhong
School: Northeastern University
Course: Materials Engineering
Keywords: halogen lamp W powder dopant annealing lifetime
CLC: TM923.328
Type: Master's thesis
Year: 2008
Downloads: 24
Quote: 0
Read: Download Dissertation

Abstract


The systematic research work was dong in this paper on the processing of tungsten wires for halogen lamp based on the the quality problems of the wires made in HL company by comparisons of the properties differences between wires made in HL and foreign companies, The processing technology was optimized, so that the quality of the wires made in HL reaches the level of the products made in developed countries.The solid-liquid mixing way has an advantage over the spraying mixing, which can raise the dopant content in the TBO and make the dopant distribution uniformity. In the process of the solid-liquid mixed, PH of the dopant solution was the key factor which controls the precipitation of the colloid. The suitable level of the PH value is about 3.3, which makes operation easy and precipitation of the colloid slow.Using BD powder technique prepared the bars with different size particles tungsten powder which can improved the distribution of particle size of tungsten powder and dopant uniformality and the sintering ability of the powder to provide the high quality materials for following processing.The temperature gradient of the bars should keep in small range in sintering. It is easy to makes the temperature field uniform by use of small size bars.It is detected by the comparisons that annealing has an important effect on tungsten wire property so that the extent and rate of the re-crystallization should be controlled carefully. The sag value of the wires after final annealing is enough low when the total reduction ratio is at about 70% for 4-6 grains in cross section of the wires after finished products annealing.

Related Dissertations

  1. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  2. Partical Combination of Fine Powder Effect on Performance of Cement and Concrete,TU528.041
  3. Lifetime Prediction and Channel Wall Erosion Accelerate Test of Hall Thruster,V439.2
  4. Active Power Filter and Its Application in Distribution Network,TN713.8
  5. Preparation and Properties of lead-free glass powder,TQ171.6
  6. Study on the Critical Technics of Se-Enriched Garlic Products with Low Pungency,TS255.5
  7. Study on the Application of HACCP System in the Production of Ganoderan,TS218
  8. Research on Cluster-based Routing Protocols in Wireless Sensor Network,TP212.9
  9. Stainless Steel Bright Annealing Furnace with Waste Heat Recovery Energy-saving Technology Research,TG155.1
  10. Modification of Talc Powder and Its Reinforcing and Toughening on Recycled Polypropylene,TQ325.14
  11. Cold Rolling Process Optimizing on Structural Carbon Steel,TG335.12
  12. The Deformation Law and Its Influnecing Factors of Iron-based Valve Plate in Sintering Process,TF124.5
  13. Plant Design of Infant Formula Milk Powders with Output 20 Tons Per Shift,TS252.8
  14. The Research and Implementation of the Fault Management System for Triple Play,TP315
  15. The Research of Trust Model and Related Technologies in P2P Networks,TP393.08
  16. Research of Saving -energy Routing Algorithm for Wireless Sensor Networks,TP212.9
  17. Image registration techniques and optimization algorithms research,TP391.41
  18. Investigation of Self-Assembly of Xanthan Gum with Atomic Force Microscopy,O561
  19. Metal powder injection molding computer simulation,TF124.39
  20. Research for Transverse Tension Distribution on Steel Strip in Continuous-annealing Furnace Based on ANSYS,TG156.2
  21. The Preparation of Cenosphere Composite Absorbent,TB34

CLC: > Industrial Technology > Electrotechnical > Electrification,electrical energy application > Electrical lighting > Bulbs \u0026 Tubes > Gas discharge lamp > Tungsten halogen lamp , metal halogen
© 2012 www.DissertationTopic.Net  Mobile