Viscosity of RE-Mg-Si-O-N(RE = Y, Gd, Nd and La) melts

Sohei Sukenaga, Daiji Nakata, Tomoyasu Ichiki, Noritaka Saito, Kunihiko Nakashima

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Viscosities of the molten RE-Mg-Si-O-N(RE = Y, Gd, Nd and La) glasses have been measured using a newly-developed rotational viscometer with gas tight furnace. Effects of nitrogen and rare-earth additives on the viscosities of RE-Mg-Si-O-N melts have been investigated systematically at elevated temperature (∼1873 K). The viscosities of molten RE-Mg-Si-O-N glasses exponentially increased with nitrogen content, which indicates that the substitution of nitrogen for oxygen in the melts may lead to a high average coordination of nonmetal atoms, and that the increase of cross-linking produces a more rigid network structure. The viscosities of RE-Mg-Si-O-N melts were found to decrease in the order of cationic radius of rare-earth elements, which suggests that larger rare-earth elements behave as a stronger network modifier of complex silicate or silicon-oxynitride anions in elevated temperature melts. Additionally, the viscosity of the smaller rare earth containing oxynitride melt indicated more sensitive increase with nitrogen content.

Original languageEnglish
Pages (from-to)1050-1056
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume71
Issue number11
DOIs
Publication statusPublished - Nov 1 2007

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Viscosity
viscosity
Nitrogen
rare earth elements
nitrogen
oxynitrides
Rare earth elements
Rare earths
Molten materials
Nonmetals
Silicates
Glass
viscometers
Viscometers
glass
Silicon
Anions
furnaces
silicates
Furnaces

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Viscosity of RE-Mg-Si-O-N(RE = Y, Gd, Nd and La) melts. / Sukenaga, Sohei; Nakata, Daiji; Ichiki, Tomoyasu; Saito, Noritaka; Nakashima, Kunihiko.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 71, No. 11, 01.11.2007, p. 1050-1056.

Research output: Contribution to journalArticle

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