Influence of deposition parameters on the structure and microstructure of Bi12TiO20 films obtained by pulsed laser deposition

Author(s):Show less -

Gorup, L. F. ^{[1, 2, 3]} ; Bouquet, V. ^[2] ; Deputier, S. ^[2] ; Dorcet, V. ^[2] ; Guilloux-Viry, M. ^[2] ; Santos, I. M. G. ^[4] ; Silva, A. A. ^[1] ; Nogueira, A. E. ^[5] ; Kubo, A. M. ^[3] ; Longo, E. ^[3] ; Camargo, E. R. ^[3]

Affiliation

^[1] Fed Univ Grande Dourados, Dept Chem, FACET, BR-79804970 Dourados, MS - Brazil

^[2] Univ Rennes 1, Inst Sci Chim Rennes, CNRS, UMR 6226, Campus Beaulieu, F-35042 Rennes - France

^[3] UFSCar Fed Univ Sao Carlos, LIEC Dept Chem, Rod Washington Luis Km 235, CP 676, BR-13565905 Sao Carlos, SP - Brazil

^[4] Univ Fed Paraiba, Dept Chem, LACOM, Campus 1, BR-58059900 Joao Pessoa, PB - Brazil

^[5] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 45, n. 3, p. 3510-3517, FEB 15 2019.
• Web of Science Citations: 1

Abstract

The structure, morphology and surface roughness of Bi12TiO20 (BTO) thin films grown on R-sapphire by pulsed laser deposition (PLD) were studied at different substrate temperatures, target-substrate distances, oxygen pressures and laser-pulse repetition rates. Although the substrate temperature seems to be the most important experimental parameter, the gas pressure and the target-substrate distance played important role on the phase formed and film thickness, with a significant effect of the laser-pulse repetition rate on the films thickness and preferred orientation of the deposited film. Single-phase gamma-Bi12TiO20 was obtained on substrates at 650 degrees C, while several BTO metastable phases were observed in films deposited on substrates at temperatures between 500 and 600 degrees C. By the first time, thin films of pure and textured delta-Bi12TiO20 were successfully growth on substrates at 450 degrees C. When annealed, all the films deposited at lower temperatures resulted in the thermodynamically stable gamma-Bi12TiO20 (AU)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 12/07067-0 - Photocatalyst based in bismuth titanate synthesized by the oxidant peroxo method (OPM)
• Grantee: Emerson Rodrigues de Camargo
• Support Opportunities: Regular Research Grants
• FAPESP's process: 08/57872-1 - National Institute for Materials Science in Nanotechnology
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Projects - Thematic Grants