Preparation and characterizations of tantalum pentoxide (Ta 2O 5) nanoparticles and UV-curable Ta 2O 5-acrylic nanocomposites

Heh Chang Huang, Tsung-Eong Hsien*

*Corresponding author for this work

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Tantalum pentoxide (Ta 2O 5) nanoparticles with the sizes in the range of 20-50 nm were prepared via a chemical route in which the oleic acid (OLEA) was adopted as the surfactant for the synthesis process. X-ray diffraction (XRD) revealed the as-synthesized Ta 2O 5 transforms from amorphous to hexagonal and orthorhombic structures at the temperatures of 700°C and 750°C, respectively, illustrating the suppression of recrystallization temperature of Ta 2O 5 due to the particle size reduction. UV-curable nanocomposites containing the Ta 2O 5 nanoparticles and acrylic matrix were also prepared. Thermogravimetry analysis (TGA) found an about 10-20°C improvement on the 5% weight-loss thermal decomposition temperatures (T ds). Dielectric measurement showed that the dielectric constant of nanocomposite increases with the increase in the filler loading without severe deterioration of dielectric loss. The increment of dielectric constants was ascribed to the addition of high-dielectric inorganic fillers as well as the presence of interfacial polarization at the organic/inorganic interfaces.

Original languageEnglish
Pages (from-to)1252-1259
Number of pages8
JournalJournal of Applied Polymer Science
Volume117
Issue number3
DOIs
StatePublished - 1 Aug 2010

Keywords

  • Acrylic polymer
  • Dielectric properties
  • Nanocomposites
  • Tantalum pentoxide
  • UV-curable nanocomposites

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