Enhanced Densification by Seeding of Sol‐Gel‐Derived Aluminum Titanate

A. V. Prasadarao; Ulagaraj Selvaraj; Sridhar Komarneni; Amar S. Bhalla; Rustum Roy

doi:10.1111/j.1151-2916.1992.tb04220.x

Enhanced Densification by Seeding of Sol‐Gel‐Derived Aluminum Titanate

A. V. Prasadarao, Ulagaraj Selvaraj, Sridhar Komarneni, Amar S. Bhalla, Rustum Roy

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Abstract

Aluminum titanate was prepared by two different methods. A monophasic gel was obtained by cohydrolysis and polycondensation reactions of chelated aluminum sec‐butoxide and titanium isopropoxide. A diphasic gel was obtained from boehmite and anatase. Effects of homogeneous dispersion of magnesium oxide and iron oxide incorporated as alkoxides in the monophasic gel and also the effects of isostructural seed on the crystallization and densification of aluminum titanate obtained from monophasic and diphasic gels were investigated. Seed particles of MgTi₂O₅ facilitated lowering of crystallization temperature and enhanced densification of aluminum titanate. Microstructure studies indicated that almost‐microcrack‐free sintered bodies with smaller grains were formed from the seeded monophasic and diphasic gels.

Original language	English (US)
Pages (from-to)	1529-1533
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	75
Issue number	6
DOIs	https://doi.org/10.1111/j.1151-2916.1992.tb04220.x
State	Published - Jun 1992

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1992.tb04220.x

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title = "Enhanced Densification by Seeding of Sol‐Gel‐Derived Aluminum Titanate",

abstract = "Aluminum titanate was prepared by two different methods. A monophasic gel was obtained by cohydrolysis and polycondensation reactions of chelated aluminum sec‐butoxide and titanium isopropoxide. A diphasic gel was obtained from boehmite and anatase. Effects of homogeneous dispersion of magnesium oxide and iron oxide incorporated as alkoxides in the monophasic gel and also the effects of isostructural seed on the crystallization and densification of aluminum titanate obtained from monophasic and diphasic gels were investigated. Seed particles of MgTi2O5 facilitated lowering of crystallization temperature and enhanced densification of aluminum titanate. Microstructure studies indicated that almost‐microcrack‐free sintered bodies with smaller grains were formed from the seeded monophasic and diphasic gels.",

author = "Prasadarao, {A. V.} and Ulagaraj Selvaraj and Sridhar Komarneni and Bhalla, {Amar S.} and Rustum Roy",

year = "1992",

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T1 - Enhanced Densification by Seeding of Sol‐Gel‐Derived Aluminum Titanate

AU - Prasadarao, A. V.

AU - Selvaraj, Ulagaraj

AU - Komarneni, Sridhar

AU - Bhalla, Amar S.

AU - Roy, Rustum

PY - 1992/6

Y1 - 1992/6

N2 - Aluminum titanate was prepared by two different methods. A monophasic gel was obtained by cohydrolysis and polycondensation reactions of chelated aluminum sec‐butoxide and titanium isopropoxide. A diphasic gel was obtained from boehmite and anatase. Effects of homogeneous dispersion of magnesium oxide and iron oxide incorporated as alkoxides in the monophasic gel and also the effects of isostructural seed on the crystallization and densification of aluminum titanate obtained from monophasic and diphasic gels were investigated. Seed particles of MgTi2O5 facilitated lowering of crystallization temperature and enhanced densification of aluminum titanate. Microstructure studies indicated that almost‐microcrack‐free sintered bodies with smaller grains were formed from the seeded monophasic and diphasic gels.

AB - Aluminum titanate was prepared by two different methods. A monophasic gel was obtained by cohydrolysis and polycondensation reactions of chelated aluminum sec‐butoxide and titanium isopropoxide. A diphasic gel was obtained from boehmite and anatase. Effects of homogeneous dispersion of magnesium oxide and iron oxide incorporated as alkoxides in the monophasic gel and also the effects of isostructural seed on the crystallization and densification of aluminum titanate obtained from monophasic and diphasic gels were investigated. Seed particles of MgTi2O5 facilitated lowering of crystallization temperature and enhanced densification of aluminum titanate. Microstructure studies indicated that almost‐microcrack‐free sintered bodies with smaller grains were formed from the seeded monophasic and diphasic gels.

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Enhanced Densification by Seeding of Sol‐Gel‐Derived Aluminum Titanate

Abstract

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