Article

Journal of Sol-Gel Science and Technology

, Volume 19, Issue 1, pp 205-209

Crack-Free, Thick Ceramic Coating Films via Non-Repetitive Dip-Coating Using Polyvinylpyrrolidone as Stress-Relaxing Agent

  • Hiromitsu KozukaAffiliated withDepartment of Materials Science and Engineering, Kansai University 3-3-35 Yamate-cho
  • , Masahiro KajimuraAffiliated withDepartment of Materials Science and Engineering, Kansai University 3-3-35 Yamate-cho
  • , Toshihiro HiranoAffiliated withDepartment of Materials Science and Engineering, Kansai University 3-3-35 Yamate-cho
  • , Katsumi KatayamaAffiliated withDepartment of Materials Science and Engineering, Kansai University 3-3-35 Yamate-cho

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Abstract

BaTiO3 and PZT films were prepared from alkoxide-acetate solutions containing polyvinylpyrrolidone (PVP) by non-repetitive dip-coating. It was demonstrated that PVP incorporated in gel films suppresses crack formation during heating and increases the critical thickness, the maximum thickness achievable without crack formation via single-step deposition. Using PVP crack-free BaTiO3 and PZT films 1.2 and 0.5 μm in thickness could be prepared, respectively, via single-step dip-coating. The films were fairly transparent and dense in microstructure. The tensile stress in heat-treated BaTiO3 films was also demonstrated to decrease significantly by incorporating PVP in gel films.

BaTiO3 films coating films cracks in films PZT films stress in films