Effect of heat treatment on formation of sol-gel (Pb, La)TiO3 films for optical application

Junmo Koo, Sung Uk Kim, Dae Sung Yoon, Kwangsoo No, Byeong Soo Bae

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Lead lanthanum titanate [(Pb,La)TiO3] sol-gel films have been prepared to investigate the effect of heat treatment on the fabrication of uniform and crack-free thick films by applying different heating schedules. The surface morphology as well as the optical properties such as refractive index, optical transmission, and optical propagation loss of the films was examined, depending on the film thickness. Because the slower and longer heating is enough to remove the organic and nitrate residues and diminish the thermal shock while heating the films, slower and longer heating can produce the uniform and crack-free thick films having higher refractive index as well as lower optical propagation loss. Also, the drying and heating of the films on a hot plate in every coating resulted in the fabrication of thick films having above 8000 Å without any defects and microcracks. This film presented the highest refractive index as well as the lowest optical propagation loss which grows exponentially with increasing the film thickness due to the scattering of defects in the film.

Original languageEnglish
Pages (from-to)812-818
Number of pages7
JournalJournal of Materials Research
Issue number3
Publication statusPublished - 1997 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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