Chemistry-crystallization relations in molecular mullite gels

Jeffrey C. Huling, Gary L. Messing

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

Sol-gel chemistry profoundly affects the crystallization of molecular aluminosilicate gels. Segregation of transition alumina-yielding species during gel synthesis results in the epitaxial nucleation of spinel at 980°C. When synthesis conditions leading to alumina segregation are avoided, t-mullite crystallizes at 980°C. However, it is shown, for the first time, that these gels are phase-separated prior to crystallization by a hydrothermal reaction known as dealumination. When the molecular gels are synthesized and heated to avoid this mechanism of phase separation, the gels crystallize directly to o-mullite at 700°C. This crystallization temperature for o-mullite in aluminosilicate gels is ∼ 500°C lower than those previously reported.

Original languageEnglish (US)
Pages (from-to)213-221
Number of pages9
JournalJournal of Non-Crystalline Solids
Volume147-148
Issue numberC
DOIs
StatePublished - 1992

Fingerprint

Mullite
Crystallization
Gels
gels
chemistry
crystallization
Aluminum Oxide
Aluminosilicates
Alumina
aluminum oxides
Phase separation
synthesis
Sol-gels
aluminosilicate
Nucleation
spinel
nucleation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

@article{4ef70ab1bf84479abe28ee6c3d300a36,
title = "Chemistry-crystallization relations in molecular mullite gels",
abstract = "Sol-gel chemistry profoundly affects the crystallization of molecular aluminosilicate gels. Segregation of transition alumina-yielding species during gel synthesis results in the epitaxial nucleation of spinel at 980°C. When synthesis conditions leading to alumina segregation are avoided, t-mullite crystallizes at 980°C. However, it is shown, for the first time, that these gels are phase-separated prior to crystallization by a hydrothermal reaction known as dealumination. When the molecular gels are synthesized and heated to avoid this mechanism of phase separation, the gels crystallize directly to o-mullite at 700°C. This crystallization temperature for o-mullite in aluminosilicate gels is ∼ 500°C lower than those previously reported.",
author = "Huling, {Jeffrey C.} and Messing, {Gary L.}",
year = "1992",
doi = "10.1016/S0022-3093(05)80620-9",
language = "English (US)",
volume = "147-148",
pages = "213--221",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
publisher = "Elsevier",
number = "C",

}

Chemistry-crystallization relations in molecular mullite gels. / Huling, Jeffrey C.; Messing, Gary L.

In: Journal of Non-Crystalline Solids, Vol. 147-148, No. C, 1992, p. 213-221.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Chemistry-crystallization relations in molecular mullite gels

AU - Huling, Jeffrey C.

AU - Messing, Gary L.

PY - 1992

Y1 - 1992

N2 - Sol-gel chemistry profoundly affects the crystallization of molecular aluminosilicate gels. Segregation of transition alumina-yielding species during gel synthesis results in the epitaxial nucleation of spinel at 980°C. When synthesis conditions leading to alumina segregation are avoided, t-mullite crystallizes at 980°C. However, it is shown, for the first time, that these gels are phase-separated prior to crystallization by a hydrothermal reaction known as dealumination. When the molecular gels are synthesized and heated to avoid this mechanism of phase separation, the gels crystallize directly to o-mullite at 700°C. This crystallization temperature for o-mullite in aluminosilicate gels is ∼ 500°C lower than those previously reported.

AB - Sol-gel chemistry profoundly affects the crystallization of molecular aluminosilicate gels. Segregation of transition alumina-yielding species during gel synthesis results in the epitaxial nucleation of spinel at 980°C. When synthesis conditions leading to alumina segregation are avoided, t-mullite crystallizes at 980°C. However, it is shown, for the first time, that these gels are phase-separated prior to crystallization by a hydrothermal reaction known as dealumination. When the molecular gels are synthesized and heated to avoid this mechanism of phase separation, the gels crystallize directly to o-mullite at 700°C. This crystallization temperature for o-mullite in aluminosilicate gels is ∼ 500°C lower than those previously reported.

UR - http://www.scopus.com/inward/record.url?scp=0026931262&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026931262&partnerID=8YFLogxK

U2 - 10.1016/S0022-3093(05)80620-9

DO - 10.1016/S0022-3093(05)80620-9

M3 - Article

AN - SCOPUS:0026931262

VL - 147-148

SP - 213

EP - 221

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

IS - C

ER -