Phase transformation of titania domains in the titania/PDMS hybrid particles by heat treatment

Masato Nakade, Kosuke Ichihashi, Makoto Ogawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thermal transformation of a previously reported spherical titania/PDMS hybrid particles (J. Mater. Sci., Vol. 39, pp. 4131-4137 (2004)) is investigated in the temperature range from 500 to 1200°C, in air, by means of differential thermal analysis (DTA), thermogravimetric analysis (TG), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), N 2 adsorption/desorption, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The hybrid particles had an islet-like nano-structure, which consisted of titania and PDMS domains of a nanometer size. The amorphous titania domains were transformed to anatase by a heat treatment above 500°C accompanying densification, while there was no significant change in the titania domain size by the heat treatment at 900°C for 2 h. The silicone domains of the hybrid particles were transformed to amorphous silica completely by the thermal decomposition of the organic groups of the silicone at 700°C for 2 h. After a heat treatment at 1200°C for 2 h, the titania crystallites in the particle partly transformed to rutile and grew by diffusion and fusion of the titania domains accompanying a morphological change of the particles. On the other hand, the silica domains remained amorphous.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume113
Issue number1316
DOIs
Publication statusPublished - 2005 Apr

Fingerprint

phase transformations
heat treatment
titanium
Titanium
Phase transitions
Heat treatment
silicones
Silicones
Silica
Silicon Dioxide
silicon dioxide
Fourier analysis
densification
Densification
Crystallites
anatase
rutile
Titanium dioxide
Differential thermal analysis
crystallites

Keywords

  • Heat treatment
  • Organic-inorganic hybrid
  • Phase transformation
  • Silicone
  • Titania

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Phase transformation of titania domains in the titania/PDMS hybrid particles by heat treatment. / Nakade, Masato; Ichihashi, Kosuke; Ogawa, Makoto.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 113, No. 1316, 04.2005, p. 280-285.

Research output: Contribution to journalArticle

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