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Lower air-crystallization temperature and nanostructured yttria-doped tetragonal zirconia polycrystals ceramics by seeding assisted chemical coprecipitation

Published online by Cambridge University Press:  31 January 2011

P. Durán
Affiliation:
Electroceramics Department, Instituto de Cerámica y Vidrio (CSIC), 28500 Arganda del Rey, Madrid, Spain
J. Tartaj
Affiliation:
Electroceramics Department, Instituto de Cerámica y Vidrio (CSIC), 28500 Arganda del Rey, Madrid, Spain
J. F. Fernández
Affiliation:
Electroceramics Department, Instituto de Cerámica y Vidrio (CSIC), 28500 Arganda del Rey, Madrid, Spain
C. Moure
Affiliation:
Electroceramics Department, Instituto de Cerámica y Vidrio (CSIC), 28500 Arganda del Rey, Madrid, Spain
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Abstract

The crystallization temperature of yttria-doped tetragonal zirconia polycrystals (Y-TZP) amorphous precursors can be lowered 150 °C below that currently used (≥500 °C), if “seeding assisted chemical coprecipitation” is used. Completely crystallized Y-TZP nanocrystalline powder was obtained by calcining at 350 °C in air; the Y-TZP precursors seeded with 10 wt% of nanometric (∼8 nm) Y-TZP particles. The seed particles enhanced both the nucleation and the crystallization rates at lower temperatures. From such a powder, 99% dense and nanostructured (grain size, <90 n m) Y-TZP bodies can be prepared by sintering below 1050 °C.

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Articles
Copyright
Copyright © Materials Research Society 1999

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