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Russian Physics Journal

, Volume 52, Issue 9, pp 957–964 | Cite as

Special features of the grain structure of polycrystalline NaNbO3 with 3-0 connection

  • V. V. Akhnazarova
  • V. D. Komarov
  • O. N. Razumovskaya
  • L. A. Reznichenko
  • L. A. Shilkina
  • S. I. Dudkina
  • V. V. Gershenovich
Condensed-State Physics

Grain structure of porous sodium niobate ceramics (with 3-0 connection and variable porosity changing from 1.0 to 13.6%) fabricated under different conditions is investigated and the microstructure parameters are calculated for different degrees of porosity. It is demonstrated that with increasing degree of porosity, the character of the sodium niobate grain structure changes due to the formation and ordering of the pore -multilayered grain coating clusters, sharp increase in the total pore surface area, and its significant excess over the external sample surface area. These structural changes can influence significantly the integral electrophysical characteristics of the porous sodium niobate ceramics and determine a high degree of its piezoanisotropy.

Keywords

sodium niobate porosity microstructure grain crystalline structure 

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Copyright information

© Springer Science+Business Media, Inc. 2009

Authors and Affiliations

  • V. V. Akhnazarova
    • 1
  • V. D. Komarov
    • 1
  • O. N. Razumovskaya
    • 1
  • L. A. Reznichenko
    • 1
  • L. A. Shilkina
    • 1
  • S. I. Dudkina
    • 1
  • V. V. Gershenovich
    • 1
  1. 1.Scientific Research Institute of Physics at Southern Federal UniversityRostov-on-DonRussia

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