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Crack-free nanostructured BaTiO3 thin films prepared by sol-gel dip-coating technique

Ashiri, R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ceramint.2014.01.078
  3. Abstract:
  4. In this report, crack-free nanostructured barium titanate thin films are prepared by a sol-gel processing method. Glacial acetic acid, barium acetate, titanium tetraisopropyl alkoxide, 2-propanol and deionized water are used as precursors for preparing stable precursor solution. Then very thin films (thickness=26 nm) are deposited on fused silica substrates. In order to prepare crack-free thin films of BaTiO3, much attention is given to solvent evaporation process and a controlled pre-drying process is developed. It is found that the control of the process, especially in the initial stage of drying process is crucial and important for preparation of the crack-free ultrathin nanostructured BaTiO3 films. In our proposed method, as-deposited thin films undergo a slow drying process in saturated vapor pressure of the precursor solution. The above process leads to the formation of crack-free nanostructured BaTiO3 thin films. Structure and morphology of the thin films are characterized by XRD, SEM and AFM characterization methods. Results indicate that the thin films are crack-free with a dense nanogranular structure
  5. Keywords:
  6. A. Crack-free nanostructured films ; Pre-drying process ; Barium compounds ; Coatings ; Cracks ; Deionized water ; Drying ; Film preparation ; Sol-gel process ; Ultrathin films ; Barium titanate thin films ; Batio ; Characterization methods ; Nanostructured Films ; Pre-drying ; Saturated vapor pressure ; Sol-gel dip-coating method ; Structure and morphology ; Process control
  7. Source: Ceramics International ; Vol. 40, issue. 6 , 2014 , pp. 8613-8619
  8. URL: http://www.sciencedirect.com/science/article/pii/S0272884214001059