Methods for Obtaining Transparent Polycrystalline Ceramics from Aluminum Oxide (Review Article)

The article analyzes the main methods for obtaining transparent polycrystalline ceramics from Al 2 O 3 by hot pressing, hot isostatic pressing and spark plasma sintering (SPS). To obtain transparent polycrystalline Al 2 O 3 , a high-purity α-Al 2 O 3 powder with a nano- or submicron particle size an...

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Bibliographic Details
Published in:Refractories and industrial ceramics 2021-07, Vol.62 (2), p.196-201
Main Authors: Oparina, I. B., Kolmakov, A. G.
Format: Article
Language:English
Subjects:
Additives
Aluminum oxide
Ceramic materials
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Electric waves
Electromagnetic radiation
Electromagnetic waves
Glass
Heat treating
Hot isostatic pressing
Hot pressing
Lanthanum oxides
Materials Science
Natural Materials
Particle size distribution
Plasma sintering
Polycrystals
Powders
Sintering
Sintering (powder metallurgy)
Spark plasma sintering
Yttrium oxide
Zirconium dioxide
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Summary:The article analyzes the main methods for obtaining transparent polycrystalline ceramics from Al 2 O 3 by hot pressing, hot isostatic pressing and spark plasma sintering (SPS). To obtain transparent polycrystalline Al 2 O 3 , a high-purity α-Al 2 O 3 powder with a nano- or submicron particle size and a narrow size distribution is used as a starting material. The best optical and mechanical results can be obtained by multistage sintering with the final stage of hot isostatic pressing. In addition, the quality of Al 2 O 3 ceramics is improved by sintering additives MgO, Y 2 O 3 , La 2 O 3 , ZrO 2 .
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-021-00582-9