Early-stage thermal oxidation of carbothermal β-sialon powder

Shiro Shimada, Takenori Aoki, Hajime Kiyono, Kenneth J.D. MacKenzie

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Early-stage thermal oxidation (below 1100°C) of carbothermally synthesized β-sialon powder was monitored by X-ray powder diffraction, solid-state 29Si and 27Al MAS NMR spectroscopy, and thermogravimetry. No crystalline oxidation products were detected by XRD but 29Si and 27Al MAS NMR indicated the early formation of amorphous silica, followed by the formation of an amorphous aluminosilicate with an atomic environment similar to that of mullite. The initial oxidation was described by a linear kinetic law with an activation energy of 170 kj·mol -1, suggesting the rate-limiting step to be due to dissolution of O 2 in an amorphous silica surface layer on the β-sialon particles.

Original languageEnglish
Pages (from-to)266-268
Number of pages3
JournalJournal of the American Ceramic Society
Volume81
Issue number1
Publication statusPublished - 1998 Jan
Externally publishedYes

Fingerprint

Powders
Silicon Dioxide
Oxidation
Silica
Mullite
Aluminosilicates
X ray powder diffraction
Nuclear magnetic resonance spectroscopy
Thermogravimetric analysis
Dissolution
Activation energy
Nuclear magnetic resonance
Crystalline materials
Kinetics
Hot Temperature
aluminosilicate

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Early-stage thermal oxidation of carbothermal β-sialon powder. / Shimada, Shiro; Aoki, Takenori; Kiyono, Hajime; MacKenzie, Kenneth J.D.

In: Journal of the American Ceramic Society, Vol. 81, No. 1, 01.1998, p. 266-268.

Research output: Contribution to journalArticle

Shimada, S, Aoki, T, Kiyono, H & MacKenzie, KJD 1998, 'Early-stage thermal oxidation of carbothermal β-sialon powder', Journal of the American Ceramic Society, vol. 81, no. 1, pp. 266-268.
Shimada, Shiro ; Aoki, Takenori ; Kiyono, Hajime ; MacKenzie, Kenneth J.D. / Early-stage thermal oxidation of carbothermal β-sialon powder. In: Journal of the American Ceramic Society. 1998 ; Vol. 81, No. 1. pp. 266-268.
@article{d3bc3a98ca9c47169453d08d71bccded,
title = "Early-stage thermal oxidation of carbothermal β-sialon powder",
abstract = "Early-stage thermal oxidation (below 1100°C) of carbothermally synthesized β-sialon powder was monitored by X-ray powder diffraction, solid-state 29Si and 27Al MAS NMR spectroscopy, and thermogravimetry. No crystalline oxidation products were detected by XRD but 29Si and 27Al MAS NMR indicated the early formation of amorphous silica, followed by the formation of an amorphous aluminosilicate with an atomic environment similar to that of mullite. The initial oxidation was described by a linear kinetic law with an activation energy of 170 kj·mol -1, suggesting the rate-limiting step to be due to dissolution of O 2 in an amorphous silica surface layer on the β-sialon particles.",
author = "Shiro Shimada and Takenori Aoki and Hajime Kiyono and MacKenzie, {Kenneth J.D.}",
year = "1998",
month = "1",
language = "English",
volume = "81",
pages = "266--268",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "1",

}

TY - JOUR

T1 - Early-stage thermal oxidation of carbothermal β-sialon powder

AU - Shimada, Shiro

AU - Aoki, Takenori

AU - Kiyono, Hajime

AU - MacKenzie, Kenneth J.D.

PY - 1998/1

Y1 - 1998/1

N2 - Early-stage thermal oxidation (below 1100°C) of carbothermally synthesized β-sialon powder was monitored by X-ray powder diffraction, solid-state 29Si and 27Al MAS NMR spectroscopy, and thermogravimetry. No crystalline oxidation products were detected by XRD but 29Si and 27Al MAS NMR indicated the early formation of amorphous silica, followed by the formation of an amorphous aluminosilicate with an atomic environment similar to that of mullite. The initial oxidation was described by a linear kinetic law with an activation energy of 170 kj·mol -1, suggesting the rate-limiting step to be due to dissolution of O 2 in an amorphous silica surface layer on the β-sialon particles.

AB - Early-stage thermal oxidation (below 1100°C) of carbothermally synthesized β-sialon powder was monitored by X-ray powder diffraction, solid-state 29Si and 27Al MAS NMR spectroscopy, and thermogravimetry. No crystalline oxidation products were detected by XRD but 29Si and 27Al MAS NMR indicated the early formation of amorphous silica, followed by the formation of an amorphous aluminosilicate with an atomic environment similar to that of mullite. The initial oxidation was described by a linear kinetic law with an activation energy of 170 kj·mol -1, suggesting the rate-limiting step to be due to dissolution of O 2 in an amorphous silica surface layer on the β-sialon particles.

UR - http://www.scopus.com/inward/record.url?scp=0031647724&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031647724&partnerID=8YFLogxK

M3 - Article

VL - 81

SP - 266

EP - 268

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 1

ER -