Sintering behavior of Y-doped ZrO2 ceramics: The effect of Al2O3 and Nb2O5 addition

Su Yong Yang; Joon Hyung Lee; Jeong Joo Kim; Jai Sung Lee

doi:10.1016/j.ssi.2004.03.026

Sintering behavior of Y-doped ZrO₂ ceramics: The effect of Al₂O₃ and Nb₂O₅ addition

Su Yong Yang, Joon Hyung Lee, Jeong Joo Kim, Jai Sung Lee

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

The effect of Al₂O₃ and Nb₂O₅ addition as the source of +3 and +5 cation dopants in yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) was examined. At around 0.2 wt.%, over the solubility limit of Al₂O₃, a second phase of Al ₂O₃ was precipitated which inhibited densification. While within the solubility limit, densification increased as the amount of Al ₂O₃ increased. It is caused by accelerated diffusion due to oxygen vacancies, which were generated during the solid solution of Al ⁺³ in Y-TZP. When Nb₂O₅ was added to Y-TZP with Al₂O₃ precipitates, the amount of the Al ₂O₃ precipitates decreased and densification increased as the amount of Nb⁺⁵ increased. The experimental results are discussed with defect chemistry by aliovalent cation substitutions.

Original language	English
Pages (from-to)	413-416
Number of pages	4
Journal	Solid State Ionics
Volume	172
Issue number	1-4 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.ssi.2004.03.026
State	Published - 31 Aug 2004

Keywords

3Y-TZP
Co-doping
Densification
Substitution

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title = "Sintering behavior of Y-doped ZrO2 ceramics: The effect of Al2O3 and Nb2O5 addition",

abstract = "The effect of Al2O3 and Nb2O5 addition as the source of +3 and +5 cation dopants in yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) was examined. At around 0.2 wt.%, over the solubility limit of Al2O3, a second phase of Al 2O3 was precipitated which inhibited densification. While within the solubility limit, densification increased as the amount of Al 2O3 increased. It is caused by accelerated diffusion due to oxygen vacancies, which were generated during the solid solution of Al +3 in Y-TZP. When Nb2O5 was added to Y-TZP with Al2O3 precipitates, the amount of the Al 2O3 precipitates decreased and densification increased as the amount of Nb+5 increased. The experimental results are discussed with defect chemistry by aliovalent cation substitutions.",

keywords = "3Y-TZP, Co-doping, Densification, Substitution",

author = "Yang, {Su Yong} and Lee, {Joon Hyung} and Kim, {Jeong Joo} and Lee, {Jai Sung}",

year = "2004",

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doi = "10.1016/j.ssi.2004.03.026",

language = "English",

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journal = "Solid State Ionics",

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T1 - Sintering behavior of Y-doped ZrO2 ceramics

T2 - The effect of Al2O3 and Nb2O5 addition

AU - Yang, Su Yong

AU - Lee, Joon Hyung

AU - Kim, Jeong Joo

AU - Lee, Jai Sung

PY - 2004/8/31

Y1 - 2004/8/31

N2 - The effect of Al2O3 and Nb2O5 addition as the source of +3 and +5 cation dopants in yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) was examined. At around 0.2 wt.%, over the solubility limit of Al2O3, a second phase of Al 2O3 was precipitated which inhibited densification. While within the solubility limit, densification increased as the amount of Al 2O3 increased. It is caused by accelerated diffusion due to oxygen vacancies, which were generated during the solid solution of Al +3 in Y-TZP. When Nb2O5 was added to Y-TZP with Al2O3 precipitates, the amount of the Al 2O3 precipitates decreased and densification increased as the amount of Nb+5 increased. The experimental results are discussed with defect chemistry by aliovalent cation substitutions.

AB - The effect of Al2O3 and Nb2O5 addition as the source of +3 and +5 cation dopants in yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) was examined. At around 0.2 wt.%, over the solubility limit of Al2O3, a second phase of Al 2O3 was precipitated which inhibited densification. While within the solubility limit, densification increased as the amount of Al 2O3 increased. It is caused by accelerated diffusion due to oxygen vacancies, which were generated during the solid solution of Al +3 in Y-TZP. When Nb2O5 was added to Y-TZP with Al2O3 precipitates, the amount of the Al 2O3 precipitates decreased and densification increased as the amount of Nb+5 increased. The experimental results are discussed with defect chemistry by aliovalent cation substitutions.

KW - 3Y-TZP

KW - Co-doping

KW - Densification

KW - Substitution

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DO - 10.1016/j.ssi.2004.03.026

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AN - SCOPUS:7544228514

SN - 0167-2738

VL - 172

SP - 413

EP - 416

JO - Solid State Ionics

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IS - 1-4 SPEC. ISS.

ER -

Sintering behavior of Y-doped ZrO₂ ceramics: The effect of Al₂O₃ and Nb₂O₅ addition

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Keywords

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