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Colloidally Processed Alumina — Ceria Stabilized Zirconia Composites

Srdic, V. V. / Radonjic, L.

Abstract Alumina-zirconia composites, containing 20 wt% ZrO2 stabilized with 0, 3 and 6 mol% CeO2 were derived from two aqueous alumina suspensions (the pure α-alumina and the α-alumina/boehmite suspensions), aqueous, alkoxide derived zirconia sol and aqueous cerium-nitrate solution by mixing, milling, ultrasonically homogenizing, slowly evaporating, drying and sintering in air. The results are summarized as follows: (i) cerium-nitrate has considerable influence on the gelation of the composite suspensions, producing less homogeneous gel microstructures with lower densities. (ii) Sintered ceria stabilized zirconia alumina composites have lower densities, less homogeneous microstructures and broader size distribution of the alumina grains and zirconia particles than unstabilized zirconia alumina composites. (iii) The stability of tetragonal zirconia increases with increasing the ceria content.

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Colloidally Processed Alumina — Ceria Stabilized Zirconia Composites

Srdic, V. V. / Radonjic, L.

Abstract Alumina-zirconia composites, containing 20 wt% ZrO2 stabilized with 0, 3 and 6 mol% CeO2 were derived from two aqueous alumina suspensions (the pure α-alumina and the α-alumina/boehmite suspensions), aqueous, alkoxide derived zirconia sol and aqueous cerium-nitrate solution by mixing, milling, ultrasonically homogenizing, slowly evaporating, drying and sintering in air. The results are summarized as follows: (i) cerium-nitrate has considerable influence on the gelation of the composite suspensions, producing less homogeneous gel microstructures with lower densities. (ii) Sintered ceria stabilized zirconia alumina composites have lower densities, less homogeneous microstructures and broader size distribution of the alumina grains and zirconia particles than unstabilized zirconia alumina composites. (iii) The stability of tetragonal zirconia increases with increasing the ceria content.

Colloidally Processed Alumina — Ceria Stabilized Zirconia Composites

Srdic, V. V. / Radonjic, L.

Abstract Alumina-zirconia composites, containing 20 wt% ZrO2 stabilized with 0, 3 and 6 mol% CeO2 were derived from two aqueous alumina suspensions (the pure α-alumina and the α-alumina/boehmite suspensions), aqueous, alkoxide derived zirconia sol and aqueous cerium-nitrate solution by mixing, milling, ultrasonically homogenizing, slowly evaporating, drying and sintering in air. The results are summarized as follows: (i) cerium-nitrate has considerable influence on the gelation of the composite suspensions, producing less homogeneous gel microstructures with lower densities. (ii) Sintered ceria stabilized zirconia alumina composites have lower densities, less homogeneous microstructures and broader size distribution of the alumina grains and zirconia particles than unstabilized zirconia alumina composites. (iii) The stability of tetragonal zirconia increases with increasing the ceria content.

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Title:

Colloidally Processed Alumina — Ceria Stabilized Zirconia Composites

Contributors:

Srdic, V. V. (author) / Radonjic, L. (author)

Published in:

Engineering Ceramics ’96: Higher Reliability through Processing ; 61-69

NATO ASI Series ; 25

Publication date:

1997-01-01

Size:

9 pages

ISBN:

978-94-011-5798-8 , 978-94-010-6448-4

ISSN:

DOI:

https://doi.org/10.1007/978-94-011-5798-8_5

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Tetragonal Zirconia , Broad Size Distribution , Zirconia Particle , Alumina Suspension , Ceria Content Engineering , Industrial and Production Engineering , Materials Science, general , Ceramics, Glass, Composites, Natural Methods , Characterization and Evaluation of Materials , Inorganic Chemistry

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