首頁 > 網路資源 > 大同大學數位論文系統

Title page for etd-0713104-162231


URN etd-0713104-162231 Statistics This thesis had been viewed 2635 times. Download 1306 times.
Author Chien-Ming Tseng
Author's Email Address g9107001@ms2.ttu.edu.tw
Department Materials Engineering
Year 2004 Semester 2
Degree Master Type of Document Master's Thesis
Language English Page Count 49
Title Melt coating of sapphire surface for middle IR transmission
Keyword
  • sapphire
  • melt coating
  • IR window
  • IR window
  • melt coating
  • sapphire
  • Abstract In this research, infrared transmittable glasses (Corning 9754, CaO-Al2O3 glass) were used to thermo coat on sapphire surface. Results showed that short duration (<15 min))at 1450℃ (accomplished by isothermal heating and cooling ) left glass on the sapphire surface as transparent glass after thermal coating. The 9754 glass showed good infrared transmittance. After coating with glass, unpolished sapphire surfaces became smooth, and the infrared transmittance of the sapphire reached about 80%. In additional, the flexural strength increased, to reach the valves of sapphire with all polish sapphire surface. However, the CaO in 9754 glass can easily react with Al atoms in sapphire and crystallization “CaAl12O19” occurred. Because of CaAl12O19, the sample will become misty.
    Advisor Committee
  • Yung-Jen Lin - advisor
  • Jiin-Jyh Shyu - co-chair
  • Long-Jeng Hu - co-chair
  • Files indicate access worldwide
    Date of Defense 2004-06-15 Date of Submission 2004-07-13


    Browse | Search All Available ETDs