Published January 1998 | Version v1
Journal article Metadata-only

Point defect studies on perovskite structured piezoelectric ceramics using positron annihilation

Creators

  • 1. Tsinghua Univ., Beijing (China). Dept. of Modern Applied Physics
  • 2. Tsinghua Univ., Beijing (China). Dept. of Materials Science and Engineering

Description

A systematic investigation of different types of lattice defects in intentionally doped or impurity substituted piezoelectric ceramics was carried out by using positron annihilation. La3+ doped PbTiO3, Sr2+, Cd2+ and La3+ doped Pb (Mg1/3Nb2/3)0.375Ti0.375Zr0.25O3; Ca2+ doped BaTiO3; and Nb5+ doped SrTiO3 were chosen as testing materials. It was found that positrons can be trapped by cation vacancies, oxygen vacancies, as well as defects associated with lattice deformations, but with different dynamic specific trapping rates and annihilation characteristics. A new possible method for determining the defect species in perovskite structured piezoelectric ceramics is presented

Additional details

Publishing Information

Journal Title
Acta Physica Sinica
Journal Volume
47
Journal Issue
1
Journal Page Range
p. 146-153.
ISSN
1000-3290
CODEN
WLHPAR

INIS

Country of Publication
China
Country of Input or Organization
China
INIS RN
29019014
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ANNIHILATION; CERAMICS; CRYSTAL DOPING; CUBIC LATTICES; PIEZOELECTRICITY; POINT DEFECTS; POSITRONS
Descriptors DEC
ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CRYSTAL DEFECTS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; ELECTRICITY; ELEMENTARY PARTICLES; FERMIONS; INTERACTIONS; LEPTONS; MATTER; PARTICLE INTERACTIONS