Interfacial precipitation in titania-doped diphasic mullite gels

Seong Hyeon Hong; Naesung Lee; Altaf H. Carim; Gary L. Messing

doi:10.1557/JMR.1998.0136

Interfacial precipitation in titania-doped diphasic mullite gels

Seong Hyeon Hong, Naesung Lee, Altaf H. Carim, Gary L. Messing

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Abstract

Interfacial precipitation in sol-gel derived, titania-doped diphasic mullite gels was investigated using conventional and high resolution transmission electron microscopy. Rutile, anatase, and brookite precipitated on the interface between {110} planes of mullite and glass pockets in the sintered body. The formation of brookite may be attributable to the Si- and Al-rich environment during precipitation. Each polymorph of titania has a unique morphology and orientation relationship with mullite. Brookite exhibits a truncated pill box shape, and anatase displays a vermicular morphology. Quenching experiments suggest that the precipitates grow and undergo phase transformations during cooling.

Original language	English (US)
Pages (from-to)	974-978
Number of pages	5
Journal	Journal of Materials Research
Volume	13
Issue number	4
DOIs	https://doi.org/10.1557/JMR.1998.0136
State	Published - Apr 1998

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Interfacial precipitation in titania-doped diphasic mullite gels",

abstract = "Interfacial precipitation in sol-gel derived, titania-doped diphasic mullite gels was investigated using conventional and high resolution transmission electron microscopy. Rutile, anatase, and brookite precipitated on the interface between {110} planes of mullite and glass pockets in the sintered body. The formation of brookite may be attributable to the Si- and Al-rich environment during precipitation. Each polymorph of titania has a unique morphology and orientation relationship with mullite. Brookite exhibits a truncated pill box shape, and anatase displays a vermicular morphology. Quenching experiments suggest that the precipitates grow and undergo phase transformations during cooling.",

author = "Hong, {Seong Hyeon} and Naesung Lee and Carim, {Altaf H.} and Messing, {Gary L.}",

note = "Funding Information: This work was supported by the Office of Naval Research under Grant No. N00014-94-0007. Acquisition of the Hitachi HF-2000 TEM was supported in part by the National Science Foundation. Financial support from the Korean Government for SHH is also acknowledged.",

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T1 - Interfacial precipitation in titania-doped diphasic mullite gels

AU - Hong, Seong Hyeon

AU - Lee, Naesung

AU - Carim, Altaf H.

AU - Messing, Gary L.

N1 - Funding Information: This work was supported by the Office of Naval Research under Grant No. N00014-94-0007. Acquisition of the Hitachi HF-2000 TEM was supported in part by the National Science Foundation. Financial support from the Korean Government for SHH is also acknowledged.

PY - 1998/4

Y1 - 1998/4

N2 - Interfacial precipitation in sol-gel derived, titania-doped diphasic mullite gels was investigated using conventional and high resolution transmission electron microscopy. Rutile, anatase, and brookite precipitated on the interface between {110} planes of mullite and glass pockets in the sintered body. The formation of brookite may be attributable to the Si- and Al-rich environment during precipitation. Each polymorph of titania has a unique morphology and orientation relationship with mullite. Brookite exhibits a truncated pill box shape, and anatase displays a vermicular morphology. Quenching experiments suggest that the precipitates grow and undergo phase transformations during cooling.

AB - Interfacial precipitation in sol-gel derived, titania-doped diphasic mullite gels was investigated using conventional and high resolution transmission electron microscopy. Rutile, anatase, and brookite precipitated on the interface between {110} planes of mullite and glass pockets in the sintered body. The formation of brookite may be attributable to the Si- and Al-rich environment during precipitation. Each polymorph of titania has a unique morphology and orientation relationship with mullite. Brookite exhibits a truncated pill box shape, and anatase displays a vermicular morphology. Quenching experiments suggest that the precipitates grow and undergo phase transformations during cooling.

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Interfacial precipitation in titania-doped diphasic mullite gels

Abstract

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