Dissertation > Excellent graduate degree dissertation topics show

The Study of Low Temperature and Free-Pb Sealing Glass for Panel Dispay

Author: ZhangJinHua
Tutor: WangMingZhi
School: Yanshan University
Course: Materials Science
Keywords: sealing glass low temperature and lead-free phosphate glass vanadium glass chemical stability
CLC: TQ171.73
Type: Master's thesis
Year: 2009
Downloads: 201
Quote: 2
Read: Download Dissertation

Abstract


With excellent sealing strength, wetting property with sealed materials and unique characteristic of thermal tolerance, sealing glass are widely used in the sealing applications of vacuum engineering, electronics, space navigation and motor vehicle. Thereby to low sealing temperature becomes the most focus on the research of sealing glasses. When the sealing temperature is low, traditional lead sealing g1asses are in high-lead content, or they would be with toxic metal oxide, such as Cd, Hg, Tl, which would pollute the environment. Nowadays, lead reduction and exploitation of lead free glasses are the social requirement which is much more concerned than before.In this paper both phosphate and vanadium sealing glass were studied. The sealing glasses were prepared by melting-quenching method. The relationship among composition, structure and properties was investigated by DSC, XRD, DILL. And then the effects of compositions on the fluid and soakage, sealing temperature, thermal expansion and chemical stability of the glass were discussed.Researches on phosphate sealing glasses show that the transition temperature (Tg) and thermal expansion coefficient (α) of R2O - P2O5 - Al2O3 - B2O3 (PR) glass are higher, therefore not suitable for sealing glass. However, P2O5-ZnO (PZ) glass was better than PR glass in Tg andαproperties and with the increasing of the P2O5/ZnO, the sealing temperature increased and then decreased. The sealing temperature of PZ-5(P2O5/ZnO is 50/35) glass is 520℃, which crystallized during sealing and belonged to microcrystalline sealing glass, so it can improve mechanical property. But the chemical stability was weak and the weight loss increased with the P2O5/ZnO ratio increased.The thermal expansion coefficient of V2O5-P2O5 (VP) sealing glass met the sealing requirement, and with the increasing of V2O5/P2O5, the sealing temperature decreased. The sealing temperature of the VP-5 (V2O5/P2O5 is 52/28) glass was 530℃. With the further increasing of (V2O5/P2O5), the sealing temperature increased a bit and the crystallizing temperature decreased and the chemical stable property increased. When the V2O5/P2O5 was 55/25, the crystallizing temperature decreased to sealing temperature and the sealing glass became microcrystalline sealing glass.

Related Dissertations

  1. Preparation and Properties of lead-free glass powder,TQ171.6
  2. The Effect of Water Quality Variations on Iron Release in Corroded Pipe,TU991.2
  3. Study on Preparation, Characteristics and Application in Hydrogen Sensor of Proton Conductors,TP212.2
  4. Chemical Stability of Desalinated Water in Distribution Systems,P747
  5. Limewater Pretreatment in the Re-mineralization Process,TU991.2
  6. Study on Enhancement of Water Chemical Stability in Limestone Contactor,TU991.21
  7. The Application of Bi2O3-B2O3-BaO System Glasses in the Electronic Paste,TQ171.1
  8. Preparation and Crystallization Behavior of Lithium-iron-phosphate Glasses,TQ171.1
  9. Study on Composition and Properties of Boron-fluorine-free Fiberglass,TQ171.1
  10. Research on Surface Microcrystallization of Aluminum Alloy of Tire Mould by Added-pressure Shot Peening,TG668
  11. Study on the Dyeing Performance of Alginate Fibers,TS193.8
  12. The Chemical Stability of Cichoric Acid and Separation and Analysis of Its Epimers by High Performance Liquid Chromatography,R284
  13. First Principles Investigation of (Fe1-xNix)4N,O781
  14. The Study of Brown Ampoule Glass,TQ171.1
  15. Synthesis and Characterization of Zeolitic Imidazolate Frameworks,O626.23
  16. Aqueous Synthesis and Characterization for Optical and Chemical Properties of CdTe/CdS/ZnS Quantum Dots,O614.242
  17. Improvement of Resistance to Cracking of Glass Sealed with Steel,TQ171.1
  18. The Research of Glass Substrates for Plasma Display Panels (PDP),TN873
  19. Synthesis of the Metal Oxide Enhanced Sealing Glass,TQ171.7
  20. Preparation and Performance Research of Fe2O3-V2O5-P2O5 Semi-Conducting Glass,TQ171.73

CLC: > Industrial Technology > Chemical Industry > Silicate > Glass Industry > A variety of glass products > Technical Glass
© 2012 www.DissertationTopic.Net  Mobile