Heat treatments for thermal sprayed lead-free piezoelectric ceramic coatings

作者：Yue, Haojie; Fang, Kailing; Gong, Zhichao; Guo, Kun^*; Guo, Shifeng; Liu, Hongfei; Yao, Kui^*; Tay, Francis Eng Hock

来源：Journal of Materials Research and Technology-JMR&T, 2023, 27: 2080-2088.

DOI：10.1016/j.jmrt.2023.10.075

• Piezoelectric
• Lead-free
• Thermal spray
• Ceramics coatings
• Plasma torch heat treatment

[0.94(Bi0.5Na0.5)TiO3-0.06BaTiO3]0.98-(LiNbO3)0.02 (BNBTLN) piezoelectric ceramic coating was fabricated by thermal spray process on stainless steel substrates with thermal barrier coating (TBC) as an intermediary layer. The morphology, structure, and electrical proper-ties of the thermal-sprayed BNBTLN coatings after furnace heat treatment (F-HT) and plasma torch heat treatment (P-HT) were studied, respectively. The BNBTLN coatings after F-HT and P-HT both had the coexisting rhombohedral and tetragonal perovskite phases and exhibited excellent electrical properties, with an effective piezoelectric coefficient d33 of 68 p.m./V and 40 p.m./V, respectively. These results reveal that high quality piezoelectric coatings can be achieved by the P-HT method, which is promising for scaling up the fabrication of piezoelectric ceramic coatings.

• 单位
  南昌航空大学; 1; 中国科学院