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Structural characterisation of Na2ZrO3

T J Bastow1, M E Hobday, M E Smith

  • 1CSIRO Division of Materials Science and Technology, Clayton, Victoria, Australia.

Solid State Nuclear Magnetic Resonance
|April 1, 1994
PubMed
Summary
This summary is machine-generated.

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Researchers studied sodium zirconate (Na2ZrO3) structure and ordering using multiple techniques. Recrystallization from bismuth oxide flux significantly reduced defects, improving long-range order and crystal structure.

Area of Science:

  • Solid-state chemistry
  • Materials science
  • Crystallography

Background:

  • Sodium zirconate (Na2ZrO3) is a material with potential applications.
  • Understanding its crystal structure and defect concentration is crucial for optimizing its properties.

Purpose of the Study:

  • To elucidate the structure and ordering of Na2ZrO3.
  • To investigate the impact of preparation methods on defect concentration and long-range order.

Main Methods:

  • X-ray diffraction
  • Electron diffraction
  • Electron microscopy
  • Solid-state nuclear magnetic resonance (NMR) spectroscopy (including 23Na MAS NMR, 17O MAS NMR, and 91Zr NMR)

Main Results:

Related Experiment Videos

  • Confirmed a monoclinic crystal structure for Na2ZrO3.
  • Identified a high concentration of planar defects (stacking disorder) in conventionally prepared samples.
  • Demonstrated significant reduction of these defects in samples recrystallized from a bismuth oxide flux.
  • NMR data indicated well-defined local coordinations, with sharpened spectra from the flux-recrystallized sample suggesting increased long-range order.

Conclusions:

  • Recrystallization from bismuth oxide flux is an effective method to reduce defects in Na2ZrO3.
  • Improved long-range order in Na2ZrO3 can be achieved through optimized synthesis.
  • The study provides detailed structural and local coordination information for Na2ZrO3.