X-ray diffraction analysis of lanthanum and titanium substituted lead zirconate

Nichole Wonderling, Else Breval, Joseph P. Dougherty

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The change in the orthorhombic structure of PbZrO3 was studied as a function of the La substitution for Pb and Ti substitution for Zr. Two types of changes can occur: (1) a change in the atom coordinates toward the positions for a perfect cubic perovskite lattice; and (2) a change of orthorhombic unit cell parameters so that ao, bo, and co exactly fit with the cubic cell parameter ac. Therefore, ao = ac√2, bo = ac 2√2, and co = a c2, where ao, bo, and co are the orthorhombic cell parameters, and ac is the cubic cell parameter. Substitution of Pb by La in the orthorhombic PLZT leads to both a change in atom coordinates and a change in unit cell parameters toward the perfect cubic structure, especially for La≥4. Substitution of Zr by Ti in the orthorhombic PLZT leads to similar atom coordinate changes, but the unit cell parameters do not change. The composition 0/92.5/7.5 contains a major tetragonal phase and a minor orthorhombic phase. There are only small differences in the orthorhombic structure between the A and the B composition of PLZT. The A composition has a structure closer to the cubic structure than the B composition.

Original languageEnglish (US)
Pages (from-to)295-300
Number of pages6
JournalPowder Diffraction
Volume17
Issue number4
DOIs
StatePublished - Dec 1 2002

All Science Journal Classification (ASJC) codes

  • Radiation
  • Materials Science(all)
  • Instrumentation
  • Condensed Matter Physics

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