Crystallization kinetics of mullite from Al2O3-SiO2 glasses under non-isothermal conditions

Takahiro Takei, Yoshikazu Kameshima, Atsuo Yasumori, Kiyoshi Okada

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

The kinetics of mullite crystallization from Al2O3-SiO2 glasses with chemical compositions ranging from 15 to 50 mol% Al2O3 were investigated under non-isothermal conditions using DTA. The glasses were prepared by ultra-quenching of molten droplets formed at the tip of a sintered aluminosilicate rod by an infra-red imaging furnace quenched by a twin-roller system. All the samples showed an exothermic peak at about 1000°C associated with mullitization. This crystallization temperature increased slightly with decreasing Al2O3 content. The exothermic peak split into two peaks at a glass composition of about 25 mol% Al2O3. This splitting is thought to be related to phase separation of the glass preceding mullitization. The activation energies for the nucleation-growth mechanism of mullitization, calculated by the Kissinger method, were 900-1300 kJ/mol, in good agreement with those for glass fibers obtained under isothermal conditions (Takei, T., Kameshima, Y., Yasumori, A. and Okada, K., Crystallization kinetics of mullite in alumina-silica glass fibers. J. Am. Ceram. Soc., 1999, 82, 2876-2880).

Original languageEnglish
Pages (from-to)2487-2493
Number of pages7
JournalJournal of the European Ceramic Society
Volume21
Issue number14
DOIs
Publication statusPublished - 2001
Externally publishedYes

Fingerprint

Crystallization kinetics
Mullite
Glass
Crystallization
Glass fibers
Aluminum Oxide
Aluminosilicates
Infrared imaging
Fused silica
Chemical analysis
Phase separation
Differential thermal analysis
Molten materials
Quenching
Furnaces
Nucleation
Alumina
Activation energy
aluminosilicate
Temperature

Keywords

  • Activation energy
  • Crystallizatioin
  • DTA
  • Glass
  • Mullite

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Crystallization kinetics of mullite from Al2O3-SiO2 glasses under non-isothermal conditions. / Takei, Takahiro; Kameshima, Yoshikazu; Yasumori, Atsuo; Okada, Kiyoshi.

In: Journal of the European Ceramic Society, Vol. 21, No. 14, 2001, p. 2487-2493.

Research output: Contribution to journalArticle

@article{74766f958fbf474a8dd2c005b4b9526c,
title = "Crystallization kinetics of mullite from Al2O3-SiO2 glasses under non-isothermal conditions",
abstract = "The kinetics of mullite crystallization from Al2O3-SiO2 glasses with chemical compositions ranging from 15 to 50 mol{\%} Al2O3 were investigated under non-isothermal conditions using DTA. The glasses were prepared by ultra-quenching of molten droplets formed at the tip of a sintered aluminosilicate rod by an infra-red imaging furnace quenched by a twin-roller system. All the samples showed an exothermic peak at about 1000°C associated with mullitization. This crystallization temperature increased slightly with decreasing Al2O3 content. The exothermic peak split into two peaks at a glass composition of about 25 mol{\%} Al2O3. This splitting is thought to be related to phase separation of the glass preceding mullitization. The activation energies for the nucleation-growth mechanism of mullitization, calculated by the Kissinger method, were 900-1300 kJ/mol, in good agreement with those for glass fibers obtained under isothermal conditions (Takei, T., Kameshima, Y., Yasumori, A. and Okada, K., Crystallization kinetics of mullite in alumina-silica glass fibers. J. Am. Ceram. Soc., 1999, 82, 2876-2880).",
keywords = "Activation energy, Crystallizatioin, DTA, Glass, Mullite",
author = "Takahiro Takei and Yoshikazu Kameshima and Atsuo Yasumori and Kiyoshi Okada",
year = "2001",
doi = "10.1016/S0955-2219(01)00266-7",
language = "English",
volume = "21",
pages = "2487--2493",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier BV",
number = "14",

}

TY - JOUR

T1 - Crystallization kinetics of mullite from Al2O3-SiO2 glasses under non-isothermal conditions

AU - Takei, Takahiro

AU - Kameshima, Yoshikazu

AU - Yasumori, Atsuo

AU - Okada, Kiyoshi

PY - 2001

Y1 - 2001

N2 - The kinetics of mullite crystallization from Al2O3-SiO2 glasses with chemical compositions ranging from 15 to 50 mol% Al2O3 were investigated under non-isothermal conditions using DTA. The glasses were prepared by ultra-quenching of molten droplets formed at the tip of a sintered aluminosilicate rod by an infra-red imaging furnace quenched by a twin-roller system. All the samples showed an exothermic peak at about 1000°C associated with mullitization. This crystallization temperature increased slightly with decreasing Al2O3 content. The exothermic peak split into two peaks at a glass composition of about 25 mol% Al2O3. This splitting is thought to be related to phase separation of the glass preceding mullitization. The activation energies for the nucleation-growth mechanism of mullitization, calculated by the Kissinger method, were 900-1300 kJ/mol, in good agreement with those for glass fibers obtained under isothermal conditions (Takei, T., Kameshima, Y., Yasumori, A. and Okada, K., Crystallization kinetics of mullite in alumina-silica glass fibers. J. Am. Ceram. Soc., 1999, 82, 2876-2880).

AB - The kinetics of mullite crystallization from Al2O3-SiO2 glasses with chemical compositions ranging from 15 to 50 mol% Al2O3 were investigated under non-isothermal conditions using DTA. The glasses were prepared by ultra-quenching of molten droplets formed at the tip of a sintered aluminosilicate rod by an infra-red imaging furnace quenched by a twin-roller system. All the samples showed an exothermic peak at about 1000°C associated with mullitization. This crystallization temperature increased slightly with decreasing Al2O3 content. The exothermic peak split into two peaks at a glass composition of about 25 mol% Al2O3. This splitting is thought to be related to phase separation of the glass preceding mullitization. The activation energies for the nucleation-growth mechanism of mullitization, calculated by the Kissinger method, were 900-1300 kJ/mol, in good agreement with those for glass fibers obtained under isothermal conditions (Takei, T., Kameshima, Y., Yasumori, A. and Okada, K., Crystallization kinetics of mullite in alumina-silica glass fibers. J. Am. Ceram. Soc., 1999, 82, 2876-2880).

KW - Activation energy

KW - Crystallizatioin

KW - DTA

KW - Glass

KW - Mullite

UR - http://www.scopus.com/inward/record.url?scp=0034826905&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034826905&partnerID=8YFLogxK

U2 - 10.1016/S0955-2219(01)00266-7

DO - 10.1016/S0955-2219(01)00266-7

M3 - Article

AN - SCOPUS:0034826905

VL - 21

SP - 2487

EP - 2493

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 14

ER -