The change of YSZ nanoparticles crystalline structure by powerful ultrasound activation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The changes of phase composition in polymorphous ZrO2-5wt% Y2O3 (YSZ) nanopowder, size of crystallites and their microstrains induced by influence of powerful ultrasound activation (PUA) were studied by XRD techniques. It was shown that during the process of dry nanopowder sonication the part of tetragonal (t) phase transforms to cubic (c) one, its significant smaller part - to monoclinic (m) phase. With PUA power W increasing from O up to 3 kW the rise of apparent crystallite sizes (ACS) was observed for all the phases. Such increasing the ACS is unusual, as it would be expected decreasing the crystallite sizes because of the destroying action of PU-oscillations on crystalline substances. The analysis of ACS values versus phase composition showed that the smallest in size crystallites of t-phase (with the sizes about 10 nm) transfer to c-phase, therewith the average value of ACS of c-phase increases (but not ACS values themselves) at the expense of rise of crystallite amount with the sizes of ∼10 nm. The larger crystallites of t-phase (sizes about 40 nm) martensitely transfer to m-phase increasing the average value of ACS for this phase. As a result the t-phase loses the most part of its crystallites with small and medium sizes (from 10 up to 40 nm), and the average size of the rest of t-phase crystallites (but not the sizes by themselves) rises at increase of W. The essential influence of PUA on the relative crystallite microstrains in c-phase (consisting of small crystallites ∼10 nm) and slight influence on larger crystallites of m- and t-phases were observed.

Original languageEnglish
Title of host publicationProceedings - KORUS 2003: 7th Korea-Russia International Symposium on Science and Technology
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages152-156
Number of pages5
Volume1
ISBN (Print)8978686176, 9788978686174
Publication statusPublished - 2003
Event7th Korea-Russia International Symposium on Science and Technology, KORUS 2003 - Ulsan, Korea, Republic of
Duration: 28 Jun 20036 Jul 2003

Other

Other7th Korea-Russia International Symposium on Science and Technology, KORUS 2003
CountryKorea, Republic of
CityUlsan
Period28.6.036.7.03

Keywords

  • Ceramics
  • Crystallization
  • Lattices
  • Light scattering
  • Nanoparticles
  • Plasmas
  • Powders
  • Research and development
  • Ultrasonic imaging
  • X-ray scattering

ASJC Scopus subject areas

  • Building and Construction
  • Pollution
  • Biotechnology
  • Social Sciences (miscellaneous)
  • Medicine (miscellaneous)
  • Education

Fingerprint Dive into the research topics of 'The change of YSZ nanoparticles crystalline structure by powerful ultrasound activation'. Together they form a unique fingerprint.

Cite this