Enhanced sinterability of alumina particles by pretreating in liquid ammonia

Michael D. Kass; David M. Cecala

doi:10.1016/S0167-577X(97)00010-4

Enhanced sinterability of alumina particles by pretreating in liquid ammonia

Michael D. Kass, David M. Cecala

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Abstract

The sinterability of high purity alumina powders was enhanced by ultrasonication in liquid ammonia. The surfaces of the resulting powders contained agglomerated regions of submicron-sized particles that were metallic in appearance. When heated to 1400 °C, these particles densified into a solid with observable grain bonding and necking.

Original language	English
Pages (from-to)	55-58
Number of pages	4
Journal	Materials Letters
Volume	32
Issue number	2-3
DOIs	https://doi.org/10.1016/S0167-577X(97)00010-4
State	Published - Aug 1997

Funding

The authors would like to acknowledge S.J. Bo-browski for specimen preparationa nd scanning elec- tron microscopy characterization and S.W. Brown for assistance with the particle size analysis. This work was sponsoredb y Oak Ridge National Laboratory, managedb y Lockheed Martin Energy Research Corp. for the U.S. Department of Energy under contract number DE-AC05-960R22464.

Keywords

AlO
Alumina
Ammonia
Powder
Sintering

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10.1016/S0167-577X(97)00010-4

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title = "Enhanced sinterability of alumina particles by pretreating in liquid ammonia",

abstract = "The sinterability of high purity alumina powders was enhanced by ultrasonication in liquid ammonia. The surfaces of the resulting powders contained agglomerated regions of submicron-sized particles that were metallic in appearance. When heated to 1400 °C, these particles densified into a solid with observable grain bonding and necking.",

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AB - The sinterability of high purity alumina powders was enhanced by ultrasonication in liquid ammonia. The surfaces of the resulting powders contained agglomerated regions of submicron-sized particles that were metallic in appearance. When heated to 1400 °C, these particles densified into a solid with observable grain bonding and necking.

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KW - Alumina

KW - Ammonia

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KW - Sintering

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JO - Materials Letters

JF - Materials Letters

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ER -

Enhanced sinterability of alumina particles by pretreating in liquid ammonia

Abstract

Funding

Keywords

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