3D Conformal Fabrication of Piezoceramic Films

Shiyuan Liu, Yao Shan, Ying Hong, Yuankai Jin, Weikang Lin, Zhuomin Zhang, Xiaote Xu, Zuankai Wang, Zhengbao Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


Piezoceramic films are an essential class of energy-conversion materials that have been widely used in the electronics industry. Although current methods create a great freedom for fabricating high-quality piezoceramic films, it requires well-controlled synthesis conditions, including special high-cost equipment and planar substrates particularly. The limited substrate selections hinder the applications of piezoceramic films in 3D conformal structures where most objects possess complex curvilinear surfaces. To overcome such limitations, a fast, energy-efficient, and cost-effective approach, named flame treated spray (FTS) coating, is developed for preparing piezoceramic films on free-form surfaces. The flame treatment significantly enhances the hydrophilicity of a substrate, assisting in forming a uniform and continuous thin film. The followed spray coating deposits hundreds of nanometers to several micrometers thick films on 3D free-form surfaces. Given the size controllability and arbitrary surface compatibility of the FTS method, a highly conformal piezoelectric tactile sensor array (4 × 4) is assembled on a spherical surface for mimicking robot fingers and an on-site thin-film sensor on the wing of an aircraft model to monitor the vibration in real-time during flight. The FTS film deposition offers a highly promising methodology for the application of functional thin-film from micro- to marcoscale devices, regardless of conformal problems.

Original languageEnglish
Article number2106030
JournalAdvanced Science
Issue number18
Publication statusPublished - 23 Jun 2022
Externally publishedYes


  • conformal ceramic films
  • energy harvesters
  • structural health monitoring
  • tactile sensor arrays
  • vibration sensors

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • General Chemical Engineering
  • General Materials Science
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • General Engineering
  • General Physics and Astronomy


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