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Synthesis of PZT Nanotubes by Sol-gel Method Aided by Carbon Nanotubes

Tabei, Ali | 2009

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 39917 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Nemati, Ali; Mohammadi, Mohammad Reza
  7. Abstract:
  8. In this project, synthesis of sol-gel derived Pb(Zr0.52Ti0.48)O3 nanotubes in the form of PZT-CNT hybrid, was accomplished by using multi-walled carbon nanotubes as sacrificial template. Simultaneous thermal analyses proved that the as-derived amorphous material crystallized at a significantly low temperature by a considerably low activation energy. X-ray diffraction and selected area electron diffraction patterns showed that the final crystal structure is tetragonal perovskite. Raman spectroscopy results proved that significant changes happened at the surface of carbon nanotubes which are believed to be due to coating. Electron images supported the deposition of a coating on the surfaces of nanotubes and proved that the final structure of the product is tubular with length near to 10 μm, wall thickness around 15 nm and internal diameter between 70-90 nm. The advantages of an interrupted annealing cycle (for crystallization) rather a continuous one was also proved. Energy-dispersive spectroscopy of characteristic X-ray of the product showed that the final product consisted of Pb, Zr, Ti and O. At last, it was deduced that by increasing the weight percent of CNT in the CNT-PZT hybrid up to the PZT:CNT=2:1 ratio, the uniformity in geometry and structure of final nanotubes improved
  9. Keywords:
  10. Carbon Nanotubes ; Sol-Gel Method ; Lead Zirconate Titanate (PZT) ; X Ray Diffraction

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