Dissertation > Excellent graduate degree dissertation topics show

Study on Red Fluorescent Material of M-Al-Si-N

Author: MenKai
Tutor: BaiChaoZuo
School: Changchun University of Science and Technology
Course: Materials Physics and Chemistry
Keywords: rare earths luminescence nitride phosphor CaAlSiN3:Eu2+
CLC: O611.3
Type: Master's thesis
Year: 2012
Downloads: 73
Quote: 0
Read: Download Dissertation

Abstract


In this thesis, the CaAlSiNa:Eu2+red phosphor and solid solutions are prepared by the carbothermal reduction and nitridation. The phosphor are analyzed by X-ray powder diffraction and fluorescence spectrophotometer for researching the crystal structure and the spectral characteristics. The results show that the best sintering temperature for synthesising phosphor is1600℃, constant temperature for6hours, the best ventilation of nitrogen is4L/min, the best doping concentration of Eu2+is20mo1%, the best doping concentration of NH4CI is0.6wt%, the best doping ratio for nc/nca is1.8. the CaAlSiNs:Eu2+phosphor belongs to orthorhombic phase, when it is stimulated by blu-ray at450nm, its emission peak locates at640nm, which has a broadband form570nm to700nm. In addition, its excitation peak locates at460-480nm. When the doping concentration of Eu2+increases, the emission intensity increased gradually; When the doping concentration of Eu2+greater than20mol%, the emission intensity began to decrease.

Related Dissertations

  1. Tolerance of Tomato on Rare Earth Elements and Its Remediation Potential on Polluted Environment,S641.2
  2. Synthesis, Luminescent Properties of Pyrazoline and Carbazole Compounds,O626.2
  3. Arsenic and antimony chalcogenides Solvothermal Synthesis and Characterization,O641.4
  4. IVA metal chalcogenides Solvothermal Synthesis and Structure,O611.4
  5. Synthesis and Optical Property of White Luminescence of Dy3+ Ions Doped 12CaO·7Al2O3 Nanopowders Under UV Light Excitation,O482.3
  6. Syntheses, Structures and Properties of Coordination Polymers with Aromatic Dicarboxylates,O631.1
  7. Fabrication, Defect Manipulation and Optical Properties of ZnO Hybrid Materials,TB33
  8. Rare-earth ions doped oxyfluoride glass ceramics upconversion photoluminescence study,O482.31
  9. The Photoluminescence of H1.77 [Sr0.8 Bi0.21Ta2 O7] Nano-layers Annealing under Different Temperatures and the Effect of the Cu2O Addition on Its Photocatalytic Activity,O482.31
  10. Progress of Research on the Visible Luminescence Mechanism of ZnO,O472.3
  11. Photostimulated Luminescence and Optical Storage Mechanism of Eu2+, Mn2+ Doped 12CaO·7Al2O3 Powders,O482.3
  12. Synthesis and Luminescence Properties of Gd, Eu Co-doped LaPO4,O614.331
  13. Syntheses, Structures and Properties of Microporous Metal-Organic Frameworks,O641.4
  14. Preparation and Study of Mn2+ Activated Silicate-based Red Phosphors,O482.31
  15. Synthesis and Properties of One-Dimnesional Nanosgructural Rare Eath Oxides and Vanadates Via Electrospining Process,TB383
  16. The Fabrication and Study of Luminescent Glass-ceramic for Blue LED,TQ171.1
  17. Synthesis and Luminescent Properties of Rare Earth Doped Molybdate Phosphors Materials for Light Emitting Diodes,TN312.8
  18. Preparation and Luminescence Properties of Rare Earth Ions Doped NaYF4,TB34
  19. Synthesis、 Self-assembly and Applications of Functional Nanoparticles,TB383.1
  20. Preparation of ZnO Nanostructures and Study of Defects-related Luminescence Properties,TB383.1
  21. Synthesis, Structures and Properties of CuⅠ,Ⅱ and CdⅡ Coordination Polymers of Tetrazole Ligands,O634

CLC: > Mathematical sciences and chemical > Chemistry > Inorganic Chemistry > Chemical elements and inorganic compounds > Nature
© 2012 www.DissertationTopic.Net  Mobile