TY  - JOUR
AU  - ZENG, Renfen
AU  - JIANG, Xiangping
AU  - YE, Fen
AU  - CHEN, Chao
AU  - HUANG, Xiaokun
AU  - NIE, Xin
PY  - 2022
TI  - Microstructure and Electrical Properties of Mn-doped Bismuth Layer-structured Bi7Ti4.5W0.5O21 Ceramics
JO  - Journal of Ceramics
SN  - 2095-784X
SP  - 45
EP  - 53
VL  - 43
IS  - 1
AB  - Bi7Ti4.5-xMnxW0.5O21 (BTW-BIT-x Mn) bismuth layered-structure ceramics were synthesized by using the traditional solid-state method. Structure and electrical properties of the Bi7Ti4.5-xMnxW0.5O21were systematically studied. XRD and SEM results showed that all the samples were single phase bismuth layered compound and the grain growth was inhibited due to the doping with Mn. Electrical properties of the ceramics were improved after doping with Mn and the Bi7Ti4.45Mn0.05W0.05O21 sample exhibited optimal properties, with a piezoelectric constant d33 of 19.3 pC/N, Curie temperature of 701 ℃ and DC resistivity of 2.1×108 Ω cm at 500 ℃. The annealing data indicated that more than 80% of the initial value of piezoelectric constant was retained at 550 ℃, demonstrating that the material has high thermal stability. Such BTW-BIT-x Mn ceramics have great potential for high-temperature piezoelectric applications.
UR  - https://doi.org/10.13957/j.cnki.tcxb.2022.01.004
DO  - 10.13957/j.cnki.tcxb.2022.01.004