Oxidation of rare earth silicon oxynitride J-phases

Junichi Takahashi; Takayuki Suehiro

doi:10.4028/3-908454-00-X.57

Oxidation of rare earth silicon oxynitride J-phases

Junichi Takahashi, Takayuki Suehiro

Center for Exploration of New Inorganic Materials

Research output: Contribution to journal › Article › peer-review

Abstract

Oxidation behavior of R₄Si₂O₇N₂ (J-phase; R = Y and rare-earth element) has been investigated by thermometric measurements in air. All R₄Si₂O₇N₂, of which the powder samples are prepared by gas-pressured sintering method under 1 MPa of N₂ gas, are oxidized to R₂SiO₅ with an exothermic reaction in air under an ambient pressure. The oxidation temperature to produce the final oxide increases from c.a. 930 to 1060 °C with decreasing the ionic radii of the rare earth elements.

Original language	English
Pages (from-to)	57-59
Number of pages	3
Journal	Key Engineering Materials
Volume	403
DOIs	https://doi.org/10.4028/3-908454-00-X.57
Publication status	Published - 2009

Keywords

J-phase
Oxidation
Silicon oxynitride

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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abstract = "Oxidation behavior of R4Si2O7N2 (J-phase; R = Y and rare-earth element) has been investigated by thermometric measurements in air. All R4Si2O7N2, of which the powder samples are prepared by gas-pressured sintering method under 1 MPa of N2 gas, are oxidized to R2SiO5 with an exothermic reaction in air under an ambient pressure. The oxidation temperature to produce the final oxide increases from c.a. 930 to 1060 °C with decreasing the ionic radii of the rare earth elements.",

keywords = "J-phase, Oxidation, Silicon oxynitride",

author = "Junichi Takahashi and Takayuki Suehiro",

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journal = "Key Engineering Materials",

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AU - Suehiro, Takayuki

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AB - Oxidation behavior of R4Si2O7N2 (J-phase; R = Y and rare-earth element) has been investigated by thermometric measurements in air. All R4Si2O7N2, of which the powder samples are prepared by gas-pressured sintering method under 1 MPa of N2 gas, are oxidized to R2SiO5 with an exothermic reaction in air under an ambient pressure. The oxidation temperature to produce the final oxide increases from c.a. 930 to 1060 °C with decreasing the ionic radii of the rare earth elements.

KW - J-phase

KW - Oxidation

KW - Silicon oxynitride

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Oxidation of rare earth silicon oxynitride J-phases

Abstract

Keywords

ASJC Scopus subject areas

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