Dissertation > Excellent graduate degree dissertation topics show

Studies on the Fabrication and Properties of BNBKT Piezoelectric Ceramic

Author: LiHongHui
Tutor: BaiChaoZuo
School: Changchun University of Science and Technology
Course: Inorganic Chemistry
Keywords: sol-gel BNBKT piezoelectric ceramics technology structure piezoelectric properties
CLC: TQ174
Type: Master's thesis
Year: 2008
Downloads: 118
Quote: 0
Read: Download Dissertation

Abstract


Piezoelectric ceramic is a function material which can exchange energy between mechanic and electricity. Traditional piezoelectric ceramics represented by Pb-based compounds give off Pb vapor in the preparation. The evaporation of Pb caused not only deviation of the composition of ceramics but also the pollution to environment. From the viewpoint of environmental consciousness and sustainable development, lead-free piezoelectric ceramics was paid more and more attention in recent years.In this paper, a （1-m-n）Na0.5Bi0.5TiO3-mK0.5Bi0.5TiO3-nBaTiO3（BNBKT） system was investigated and its ceramic powders were prepared successfully by Sol-gel method. The effects of the pH value and the temperature of the precursor and the sintering temperature of the dried gel on the formation of the sol and gel, on the crystal structure of the powder and on the morphology of the calcined powder were studied in this work. In addition, the process of fabrication was studied systematically and the structural characteristics, poling process ang piezoelectric properties of BNBKT ceramics were investigated. The results show that the dielectric constant increases then decreases with the sintering temperature. When the sintering temperature is 1130℃, the maximum piezoelectric constant of BNBKT ceramics can be obtained which reaches 150×10-12C/N. The prime polarization temperature , voltage and time is respectly 80℃, 4kV/mm and 30 min.

Related Dissertations

  1. Preparation and Photocatalytic Properties for Water Decomposition of Titanate Photocatalyst,O643.36
  2. Synthesis, Structure and Properties of PBO/SWNT Composite Fibres,TQ340.64
  3. Preparation of ITO Quai-1D Nanostructures by Sol-Gel Method Combined with Porous Anodic Aluminum Oxide Template,TB383.1
  4. Study on the Synthesis Bi3.25La0.75Ti3O12（BLT） Nanotubes and Nano Wires,TB383.1
  5. Hydrothermal Synthesis of Oxide Hollow Spheres,TB383.4
  6. Research on the Mainframe System of Powder Mixed EDM and the Craft Experiment,TG661
  7. Investigations of Structure and Glass Forming Abilty of Amorphous Alloys,TG139.8
  8. Technology of Filling Clearance and Optimizing the Bonds during Ultrasonic Brazing,TG454
  9. Study on Browning Factors and Process Optimization of Casein Purified from Qula,TS252.5
  10. Preparation and Electrocaloric Effect of BaxSr1-xTiO3 Ferroelectric Thin Films,TB383.2
  11. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  12. Finite Element Analysis and Structure Optimal Design for Combined Seal at Normal Temperature and Low Temperature,TH136
  13. Parametric Approach of Active Control Technology for Tailless Flying-Wing Aircraft,V249.1
  14. The Research on Artisitify Technology of Santiago·Calatrava’s Architectural Works,TU-86
  15. The Research on the Architecture Design of Science and Technology Museum,TU242.5
  16. The Research of Steel’s Representation in Architecture,TU-0
  17. Studys in the Contemporary Brand Sales Exhibition Shop Design,TU247
  18. The Study on Structural Calculation and Analysis Method of Lattice-type Crane with Variable Cross-section Boom,TH21
  19. Based on Nonliner Finite Element Analysis of the Infilled Wall Frame Structure,TU323.5
  20. Influence of over Fired Air on Gas-Solid Flows in a W-Shaped Flame Boiler,TK229
  21. Experimentation Research for Deoxidize Reaction Process of NO_X Adopt Different Reburnning Fuels,TK227.1

CLC: > Industrial Technology > Chemical Industry > Silicate > Ceramic Industry
© 2012 www.DissertationTopic.Net  Mobile