Title

Enhanced piezoelectric properties of Nb and Mn co-doped CaBi4Ti4O15 high temperature piezoceramics

RIS ID

118076

Publication Details

Shen, Z., Sun, H., Tang, Y., Li, Y. & Zhang, S. (2015). Enhanced piezoelectric properties of Nb and Mn co-doped CaBi4Ti4O15 high temperature piezoceramics. Materials Research Bulletin, 63 129-133.

Abstract

The properties of CaBi4Ti4O15 (CBT), CaBi4Ti3.95Nb0.05O15 (CBTN) and CaBi4Ti3.95Nb0.05O15 + 0.2 wt% MnO2 (CBTN-Mn) ferroelectric ceramics with bismuth layer structure were studied. Significant enhancement of piezoelectric coefficient was obtained for CBTN-Mn ceramics (d33 = 23 pC/N), being nearly three times that of CBT counterpart (d33 = 8 pC/N). Together with its high Curie temperature (Tc = 790 °C), low dielectric loss (tanδ = 0.2%), high resistivity (ρ = 4.2 x 106 Ω cm at 500 °C) and good thermal stability up to 700 °C, the CBTN-Mn ceramic is a potential material for high temperature piezoelectric applications.

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