High temperature piezoelectric response of polycrystalline Li-doped (K,Na)NbO3 ceramics under compressive stress

Martin A, Khansur NH, Eckstein U, Rieß K, Kakimoto KI, Webber KG (2020)

Publication Language: English

Publication Type: Journal article

Publication year: 2020

Journal

Journal of Applied Physics AIP Publishing

Book Volume: 127

Article Number: 114101

Journal Issue: 11

DOI: 10.1063/1.5134554

Abstract

The influence of uniaxial compressive stress on small-signal relative permittivity and direct piezoelectric coefficient of polycrystalline Li-modified (K0.5Na0.5)NbO3 (0, 2, and 4 mol. % Li) was characterized as a function of temperature from 25 to 450 °C. These data reveal corresponding anomalies in both the dielectric and piezoelectric properties near the well-known structural phase transitions in (KxNa1-x)NbO3. In particular, increasing stress was found to shift the orthorhombic-tetragonal (T O-T) and tetragonal-cubic (T C) phase boundaries to higher temperatures, thereby stabilizing the lower symmetry phases. Experimental results also show that stress up to a critical value flattens the piezoelectric response below T O-T, above which a monotonic decrease is observed. In contrast, permittivity is increased below T O-T with increasing stress. These results are used to construct a stress-temperature phase diagram of Li-modified (K0.5Na0.5)NbO3

Authors with CRIS profile

Alexander Martin Lehrstuhl für Glas und Keramik Neamul Hayet Khansur Lehrstuhl für Glas und Keramik Udo Eckstein Lehrstuhl für Glas und Keramik Kevin Rieß Professur für Werkstoffwissenschaften (Funktionskeramik) Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Additional Organisation(s)

Graduiertenkolleg 2495 Energiekonvertierungssysteme: von Materialien zu Bauteilen (Energy Conversion Systems: From Materials to Devices) Professur für Werkstoffwissenschaften (Funktionskeramik)

Related research project(s)

Energy Conversion Systems: From Materials to Devices (GRK 2495) Jan. 1, 2020 - June 30, 2024

Involved external institutions

Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku JP Japan (JP)

How to cite

APA:

Martin, A., Khansur, N.H., Eckstein, U., Rieß, K., Kakimoto, K.I., & Webber, K.G. (2020). High temperature piezoelectric response of polycrystalline Li-doped (K,Na)NbO3 ceramics under compressive stress. Journal of Applied Physics, 127(11). https://doi.org/10.1063/1.5134554

MLA:

Martin, Alexander, et al. "High temperature piezoelectric response of polycrystalline Li-doped (K,Na)NbO3 ceramics under compressive stress." Journal of Applied Physics 127.11 (2020).

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