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Pyroelectric properties of Mn‐doped Aurivillius ceramics with different pseudo‐perovskite layers
Author(s) -
Tang Yanxue,
Shen ZongYang,
Zhao Xiangyong,
Wang Feifei,
Shi Wangzhou,
Sun Dazhi,
Zhou Zhiyong,
Zhang Shujun
Publication year - 2018
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/jace.15267
Subject(s) - aurivillius , pyroelectricity , materials science , perovskite (structure) , ceramic , curie temperature , figure of merit , ferroelectricity , doping , ferroelectric ceramics , dielectric , permittivity , mineralogy , analytical chemistry (journal) , optoelectronics , condensed matter physics , composite material , crystallography , ferromagnetism , chemistry , physics , chromatography
The pyroelectric properties of Mn‐doped Aurivillius ceramics with different pseudo‐perovskite layers were investigated. The pyroelectric coefficients for 0.2 wt% Mn‐doped two‐layer CaBi 2 Nb 2 O 9 ( CBN –Mn), three‐layer Bi 4 Ti 2.85 Nb 0.15 O 12 ( BTN –Mn), and four‐layer CaBi 4 Ti 3.95 Nb 0.05 O 15 ( CBTN –Mn) ferroelectric ceramics were found to be on the order of 26.0, 54.4, 84.4 μC/m 2 K at room temperature, respectively. These values were closely associated with the number of octahedral layers in the pseudo‐perovskite blocks. The high pyroelectric coefficient, together with low dielectric permittivity and loss (tan δ < 0.003), results in to high figures of merit for the current responsivity, voltage responsivity, and detectivity. The excellent pyroelectric properties and high Curie temperatures ( T C > 660°C) make the Aurivillius ceramics potential candidates for pyroelectric devices over a broad temperature range.
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