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Effects of Sintering Atmosphere on Densification Behavior and Piezoelectric Properties of Pb(Ni 1/3 Nb 2/3 )O 3 –PbZrO 3 Ceramics
Author(s) -
Moon Jong H.,
Jang Hyun M.
Publication year - 1993
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1993.tb03825.x
Subject(s) - sintering , partial pressure , materials science , crystallite , atmosphere (unit) , ceramic , analytical chemistry (journal) , piezoelectricity , grain size , dielectric , mineralogy , permittivity , oxygen , composite material , metallurgy , thermodynamics , chemistry , physics , optoelectronics , organic chemistry , chromatography
Densification of polycrystalline Pb(Ni 1/3 Nb 2/3 )O 3 –PbTiO 3 –PbZrO 3 (PNN–PT–PZ) specimens was enhanced as the partial pressure of O 2 in the sintering atmosphere was increased. This observation was attributed to the increase in the internal pressure of a closed pore due to the thermal decomposition of PbO at a low partial pressure of O 2 . The relative dielectric permittivity (ε r ), d 33 , k p , and grain size of sintered specimens were also increased as the partial pressure of O 2 in the sintering atmosphere was increased. The observed dependence of piezoelectric properties on the partial pressure of O 2 was discussed in terms of the enhanced formation of the A‐site vacancy ( V ″ Pb ) or the suppression of the B‐site defect ( V ¨ O ) as the oxygen potential increased.