Structural, dielectric, conductive and piezoelectric properties of a new three-layer Bi4−x∕2Nax∕2Ti3−xNb x O12 Aurivillius phase piezoceramics
Year: 2025
Type: article
Abstract: A new three-layer Aurivillius phase piezoceramic, Bi[Formula: see text]Na[Formula: see text]Ti[Formula: see text]Nb x O[Formula: see text] ([Formula: see text], 0.03, 0.05 and 0.10), was prepared by the traditional solid-state sintering method. All samples display a uniphase orthorhombic structure and plate-shaped grains. The introduction of Na/Nb inhibits the generation of oxygen vacancies, enhances dielectric stability and resistivity and reduces dielectric loss. Increasing the Na/Nb amount could increase the activation energy [Formula: see text] and enhance the dc resistivity. The dc resistivity of Bi[Formula: see text]Na[Formula: see text]Ti[Formula: see text]Nb x O[Formula: see text] ([Formula: see text]) ceramics has increased to above [Formula: see text] [Formula: see text]cm at [Formula: see text]C and [Formula: see text] [Formula: see text]cm at [Formula: see text]C. The conduction mechanisms of the Bi[Formula: see text]Na[Formula: see text]Ti[Formula: see text]Nb x O[Formula: see text] ceramics are also sufficiently explored. The conducting carriers are mainly oxygen vacancies, and their migration exhibits temperature-dependent relaxation characteristics. The Bi[Formula: see text]Na[Formula: see text]Ti[Formula: see text]Nb[Formula: see text]O[Formula: see text] ceramics obtain the excellent properties of high [Formula: see text]C, small [Formula: see text]C, low [Formula: see text], large [Formula: see text]cm and better [Formula: see text] [Formula: see text]pC/N. This work presents a valid tactic to design Aurivillius phase piezoceramics with enhanced resistivity and piezoelectricity for the field of high-temperature piezoelectricity.
Source: Journal of Advanced Dielectrics
Authors: Xinchun Xie, Dapeng Song, Yulu Ding, Aiwen Xie, Ao Tian, Xin Gao, Liqiang Liu, Shuang Yin, Ruzhong Zuo
Institutions: Anhui Polytechnic University, Huainan Normal University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
Funder: Anhui Polytechnic University
OpenAlex ID: W4415979128