Silica coating of synthesized Ta3N5 powders by the micro-emulsion method

Jae Hwan Pee, Jong Chul Park, Yoojin Kim, Woo Seok Cho, Hyung Ho Park

Research output: Contribution to journalConference article

Abstract

We synthesized yellow TaON and red Ta3N5 by ammonolysis of amorphous Ta(OH)5 between 800 and 1000 °C. Ta(OH)5 was prepared by titration, using TaCl5 as the starting material. Yellow TaON was synthesized at 900 °C for 2 h, and red Ta3N5 was synthesized at 1000 °C for 5 h. In general, red Ta3N5 powders were easily oxidized at 500 °C, with the color changing from red to white. To minimize the oxidation problem of Ta3N5 powders, we proposed a silica coating system using tetraethyl orthosilicate (TEOS) and 3-aminopropyltriethoxy-silane (APTES) as surfactants. The tonality of silica-coated Ta3N5 changes very little, indicating that the silica coating minimizes the oxidation of Ta3N5 nanoparticles.

Original languageEnglish
Article number014048
JournalPhysica Scripta T
VolumeT139
DOIs
Publication statusPublished - 2010 Jul 23
Event3rd International Symposium on Functional Materials 2009, ISFM 2009 - Jinju, Korea, Republic of
Duration: 2009 Jun 152009 Jun 18

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics

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