Microstructure and electrical properties of Nb and Mn co-doped CaBi 4 Ti 4 O 15 high temperature piezoceramics obtained by two-step sintering
Source abstract
Abstract
Abstract Bismuth layer structural ceramics with a composition of CaBi4Ti3.95Nb0.05O15+0.2 wt% MnO2 (CBTN–Mn) were prepared by a two-step sintering (TSS) approach. The effect of sintering process on the microstructure and its relationship with the electrical properties of the CBTN–Mn ceramics was investigated. A dense microstructure with small and homogeneous grains was obtained under an optimized two-step sintering condition, leading to a strongly enhanced piezoelectric constant (d33=27 pC/N). In addition, this ceramic also possesses high Curie temperature (Tc=790 °C), low dielectric loss (tan δ=0.2%) and high dc resistivity (ρ=5.5×106 Ω cm at 500 °C), indicating its potential for high temperature piezoelectric sensing applications.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Acoustic Wave Resonator Technologies · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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