Dissertation > Excellent graduate degree dissertation topics show

Preparation and Luminescence Properties of Rare-earth Doped PbF2-based Glasses

Author: ShangShanShan
Tutor: ShuKangYing
School: China Jiliang University
Course: Materials Physics and Chemistry
Keywords: scintillation glass luminescence properties rare-earth doped energytransfer
CLC: TQ171.71
Type: Master's thesis
Year: 2013
Downloads: 32
Quote: 0
Read: Download Dissertation

Abstract


The new generation high-energy physics experiments need thehomogeneous hardron calorimeter （HHCAL） with dual readout of Cherenkov andscintillation light. The key part of HHCAL is the detector material with the emissionof Cherenkov and scintillation light. Rare-earth doped oxyfluoride glass is anexcellent luminescent material, with good mechanical strength, thermal and chemicalstability. As a kind of fluoride glass, it is with low phonon energy that itsluminescence intensity would be improved effectively. The PbF2-based heavy metalscintillation glass, with high desity, short UV cut-off and low cost, is a promisingcandidate detector material for HHCAL, which have taken widerspread attentionfrom researchers all over the world recent years.In the thesis, based on the glass matrix composition of PbF2-PbO-SiO2,several rare earth ions doped glasses were prepared. Their physical andluminescent properties were investigated by measuring density, transmittance, UVspectra and X-ray excited luminescence spectra. The main researvh results are listedas following:（1） Ten kinds of matrix glass of PbF2-PbO-SiO2with different compositionratio were designed and prepared by high-temperature melting-quenching method.According to the density, the transimittance and the capability of glass-forming ofthe matrix glasses, the proper matrix glass composition is50PbF2-10PbO-40SiO2.It has high density over6.0g/cm3, refractive index over1.75and UV cut-off of326nm.（2） Under the excitation of X-ray and UV, Tb3+doped PbF2-based glassemitted blue green light resulted from the energy transition of5D3→7FJ（J=5and4） and5D4→7FJ（J=6，5，4and3） of Tb3+. Its luminescence decay time at545nm excited by UV was about2.60ms. For Eu3+doped PbF2-based glass,it emitted orange red light from5D0→7FJ（J=0，1，2，3and4） of Eu3+and itsUV luminescence decay time at592nm was about2.80ms. No scintillation light was detected in Dy3+doped PbF2-based glasses.（3） Tb3+/Gd3+and Tb3+/Dy3+co-doped PbF2-based glasses both emittedthe light of Tb3+. Due to the week self absorption of Gd3+in Tb3+/Gd3+co-doped PbF2-based glasses, Gd3+has no sensitization for the luminescenceof Tb3+. While for Tb3+/Dy3+glass, the energy transfer takes place amongTb3+and Dy3+. Accordingly, Dy3+sensitized the luminescence of Tb3+, andthen its luminous intensity was much larger than that of Tb3+doped glass.

Related Dissertations

  1. Fabrication and Research of Borate Phosphor Used for White LEDs,O482.31
  2. Synthesis and Property Study of Borate Phosphor Used for White LEDs,O482.31
  3. Preparation and Spectral Properties of Ca2MgSi2O7 and Sr4Si3O8Cl4 Based Silicate Phosphors,O482.31
  4. The Preparation of SnO2 Based Electrode and the Study of Degrading P-Chlorophenol,O614.432
  5. Preparation and Luminescence Properties of Phosphors Excited by Ultraviolet for White Light Emitting Diodes (WLED),O482.31
  6. The Preparation and Investigation of Re-Doped CdS Thin Film,O484.4
  7. Effects of Crystal-field Parameters on Electromagnetically Induced Transparency in a Rare-earth-doped Crystal,O431.2
  8. Study on Luminescent Property of Tb3+ Doped Silicate Nano Scintillation Glass,TQ171.1
  9. Preparation of Tm3+/Yb3+ Co-doped Oxyfluorosilicate Glass-ceramic Waveguide and Research on the Optical Property,TN252
  10. Study on Processing and Dielectric Properties of SrTiO3 Based Ceramics for High Energy Storage,TQ174.1
  11. Investigation on Luminescent Glass-ceramics Based on Rare Earth Doped SrO-Al2O3-SiO2 System,TQ171.1
  12. The failure mechanism of the organic electroluminescent device study,TN386
  13. Research on Doping Mechanism of BT4/BST High Frequency Dielectric Ceramics,TM28
  14. Theoretical Investigation on the Luminescent Properties of Poly (Fluorine-co-selenophene) and Poly (Fluorene-co-Thiophene),O631.3
  15. Study of Process and Properties of ZnO Thin Films Grown by Pulsed Laser Deposition,TN304
  16. Study the Modulation of Energy Gap for Rare Earth Doped ZnO by Theory and Experiment,TN304.21
  17. Studies on Crystal Structures and Functions of Metal-Organic Coordination Polymers Constructed from Novel Thiophene-based Ligands,O631.3
  18. Photoluminescence of Rare Earth Ions Doped Oxides and Their Thin Films Processing in Sol-gel Method,TB34
  19. Study on the Design and Luminescent Property of Transparent Polymer Materials Containing Lanthanide Complexes,O631
  20. The Theoretical Investigation for the Electronic Structure and Spectrum of Luminescent Metal Complexes: The Electronic Donor and Acceptor Effects,O641.4
  21. Study on Defect Structures, Optical Properties and Stabilization of Fluorene-Based Conjugated Polymers,O631.3

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