Details

Autor(en) / Beteiligte

• Zhang, Mao-Hua
• Wang, Ke
• Du, Yi-Jia
• Dai, Gang
• Sun, Wei
• Li, Geng
• Hu, Duan
• Thong, Hao Cheng
• Zhao, Chunlin
• Xi, Xiao-Qing
• Yue, Zhen-Xing
• Li, Jing-Feng

Titel

High and Temperature-Insensitive Piezoelectric Strain in Alkali Niobate Lead-free Perovskite

Ist Teil von

• Journal of the American Chemical Society, 2017-03, Vol.139 (10), p.3889-3895

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• With growing concern over world environmental problems and increasing legislative restriction on using lead and lead-containing materials, a feasible replacement for lead-based piezoceramics is desperately needed. Herein, we report a large piezoelectric strain (d 33*) of 470 pm/V and a high Curie temperature (T c) of 243 °C in (Na0.5K0.5)­NbO3-(Bi0.5Li0.5)­TiO3-BaZrO3 lead-free ceramics by doping MnO2. Moreover, excellent temperature stability is also observed from room temperature to 170 °C (430 pm/V at 100 °C and 370 pm/V at 170 °C). Thermally stimulated depolarization currents (TSDC) analysis reveals the reduced defects and improved ferroelectricity in MnO2-doped piezoceramics from a macroscopic view. Local poling experiments and local switching spectroscopy piezoresponse force microscopy (SS-PFM) demonstrates the enhanced ferroelectricity and domain mobility from a microscopic view. Distinct grain growth and improvement in phase angle may also account for the enhancement of piezoelectric properties.