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Low‐Temperature Sintering and Properties of 0.98PZT–0.02SKN Ceramics with LiBiO 2 and CuO Addition
Author(s) -
Zhang Wenli,
Eitel Richard E.
Publication year - 2011
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.1551-2916.2011.04504.x
Subject(s) - materials science , sintering , ceramic , dielectric , piezoelectricity , microstructure , curie temperature , composite material , piezoelectric coefficient , temperature coefficient , phase (matter) , optoelectronics , condensed matter physics , ferromagnetism , chemistry , physics , organic chemistry
The low‐temperature sintering behavior of Pb(Zr 0.53 , Ti 0.47 )O 3 –Sr(K 0.25 , Nb 0.75 )O 3 (PZT–SKN) piezoelectric ceramics with LiBiO 2 and CuO addition has been investigated. The addition of 6 wt% LiBiO 2 or 1 wt% LiBiO 2 +1 wt% CuO promotes the sinterability of 0.98PZT–0.02SKN ceramics owing to the generation of a liquid phase, resulting in a reduction of sintering temperature by about 300°–350°C. The microstructure, dielectric, and piezoelectric properties of flux‐sintered ceramics were examined and compared with materials conventionally sintered at 1250°C. PZT–SKN ceramics with 1 wt% LiBiO 2 +1 wt% CuO addition were sintered to high density at 900°C for 1 h. The resulting samples exhibited a high‐field d 33 piezoelectric coefficient of 415 pm/V with a Curie temperature T c of around 351°C, dielectric constant ɛ r of 1235, and planar coupling factor k p of 0.54. The reduced sintering temperature and short soaking time, together with the favorable dielectric and piezoelectric properties of the fluxed PZT–SKN ceramics, demonstrate the potential opportunity of integration with low‐temperature cofired ceramic materials and low‐fire electrode materials for the multilayer piezoelectric transducer application.