Dissertation > Excellent graduate degree dissertation topics show

Near-stoichiometric lithium niobate crystal growth and the nature of research

Author: YaoShuHua
Tutor: HuXiaoBo；WangJiYang
School: Shandong University
Course: Materials Science
Keywords: LiNbO3 Near-Stoichiometric Crystal Growth Concentration
CLC: TB34
Type: Master's thesis
Year: 2006
Downloads: 192
Quote: 1
Read: Download Dissertation

Abstract


crystal is a mutifunctional crystal, possessing non-linear, electrooptic, piezoelectric, photorefractive and self-frequency-doubling（SFD） properties. The congruent LiNbO3 crystal with large size can be grown by the Czochralski method. In addition, the crystal is easy to be cut and polished for the fabrication of related elements due to its excellent mechanical property. So LiNbO3 crystal is an important functional material, which has been extensively applicated in different fields. In recent years, stoichiometric LiNbO3 （SLN） crystal has attracted much attention. Compared with the defect density of congruent LiNbO3 （CLN） crystal, the defect density in SLN obviously decreases. In the meantime, many functional properties of SLN are better than those of CLN. Therefore, the crystal growth of high quality near-stoichiometric LiNbO3 （N-SLN） is becoming a research hot point and it was expected that the SLN is of great significance and has huge market foreground. In this thesis, we focused on the crystal growth, determination of composition, observation of defects and basic properties of N-SLN crystals. However, N-SLN crystal often shows a low optical damage threshold, therefore, the Mg:SLN crystal was grown simultaneously. The main contents of this thesis is described as follows: 1. Crystal GrowthOn the basis of the crystal growth methods of SLN in this field, we choose a large crucible to grow a small SLN crystal so that the composition was kept homogeneity in crystal. The N-SLN crystal was grown from a rich lithium melt by Czochralski method. Free-cracked near-stoichiometric LiNbCh single crystals with high optical quality were successfully grown along z-axis direction.The factors that affect quality of crystals during the growth were analyzed, according to the theories of thermodynamics and dynamics of crystal growth. A suitable thermal field was designed and constructed to grow N-SLN crystals. In our understanding, the optimal thermal field and high quality seed are the prerequisite for the crystal growth with high perfection.

Related Dissertations

  1. Study on Dust Concertiation Measurement Technique Based on Optical Back-Scattering,X831
  2. Effects of Light, Temperature and Nitrogen on the Growth of Three Kinds of Aquatic Plants,Q945
  3. Study on Nitrogen Removal by Soil Aquifer Treatment Process That Enhanced Nature Reoxygenation and Effective Volume,X703
  4. Effects of CO2 Concentration and Nitrogen Application on Grain Yield, Quality Formation and Their Physiology Mechanism in Winter Wheat,S512.1
  5. The Research on the Physiological Mechanism of the Subtending Leaf Nitrogen Concentration Impacting the Strength Formation in Cotton (Gossypium Hirsutum L.) Fiber,S562
  6. Pharmacokinetics of Progesterone Cream in Beagle Dogs Determined with LC-MS/MS,R96
  7. Research on Gas Recovery and Utilization Technology in Mine Return Current,TD712
  8. Optical Properties of Chlorphyll-a in Reservoir Water and Its Concentration Inversion Models by Remote Sensing,S127
  9. The Protective Effect and Mechanism of Trehalose in Sternum Cryopreservation,R318.52
  10. The DAST crystal material synthesis and crystal growth,O782.1
  11. The Role of Saccharomyces Cerevisiae NADH Kinase Pos5p on the Defense of Oxidative Stress,Q93
  12. Safety Evaluation about Pressure Vessel and the Etch Pit with the Effect of Interference,TH49
  13. Different crystal form of calcium sulphate crystal growth studies,O614.231
  14. Controll Morphology of Mg（OH）2 in Flame-Retardance and Its Modification,O614.22
  15. The Research between Leaf Anatomy and Polycyclic Aromatic Hydrocarbons Accumulation in Four Urban Steet Tree Species,S718.4
  16. Effect and Mechanism of Sigma-1 Receptor Agonist PRE-084 on the Intrasynaptosomal Ca2+ Concentration,R965
  17. Study on Key Devices and PAPR Reduction Technologies in All-optical OFDM Systems,TN919.3
  18. The Study on Agglomeration of Tourism Industry and the Industry Clustering Governance of Qinhuangdao,F592.7
  19. Material Transport and Study of Dynamic Mechanism in the Yangtze River Estuary,TV148.1
  20. Experimental Study of Pyrite Growth Mechanism,P618.31
  21. O2 and CO Sensing Based on Tunable Diode Laser Absorption Spectroscopy,O433.51

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Functional Materials
© 2012 www.DissertationTopic.Net  Mobile