Crystallization and microstructural characterization of ZrO2 (3 mol% Y2O3) nano-sized powders with various Al2O3 contents

Masashi Yoshimura; Sung Tag Oh; Mutsuo Sando; Koichi Niihara

doi:10.1016/S0925-8388(99)00213-3

Crystallization and microstructural characterization of ZrO₂ (3 mol% Y₂O₃) nano-sized powders with various Al₂O₃ contents

Masashi Yoshimura, Sung Tag Oh, Mutsuo Sando, Koichi Niihara

Dept. of Materials Science & Engineering

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

27 Scopus citations

Abstract

3Y-ZrO₂ gels containing 0-40 mol% Al₂O₃ were obtained by a sol-gel process with isopropoxide precursors. Crystallization behavior and microstructural characterization of the dried gels and calcined powders were studied by DSC, in situ XRD and TEM. The peak temperature of the exotherm corresponded to crystallization of gels in DSC and the activation energy for the crystallization increased with an increase of Al₂O₃ content. From the XRD analysis including the estimation of lattice parameter, the crystallized phase was confirmed as a solid solution of the tetragonal ZrO₂ with Al₂O₃. Examination by TEM and EDX showed that the powder mixtures after calcination consisted of the homogeneous and very fine grains with the size less than 10 nm.

Original language	English
Pages (from-to)	284-289
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	290
Issue number	1-2
DOIs	https://doi.org/10.1016/S0925-8388(99)00213-3
State	Published - 1999

Keywords

3Y-ZrO/AlO system
Crystallization behavior
Nanometer-sized powder
Sol-gel process

Access to Document

10.1016/S0925-8388(99)00213-3

Cite this

@article{709be6f72f7447febd978a544b9ee0ef,

title = "Crystallization and microstructural characterization of ZrO2 (3 mol\% Y2O3) nano-sized powders with various Al2O3 contents",

abstract = "3Y-ZrO2 gels containing 0-40 mol\% Al2O3 were obtained by a sol-gel process with isopropoxide precursors. Crystallization behavior and microstructural characterization of the dried gels and calcined powders were studied by DSC, in situ XRD and TEM. The peak temperature of the exotherm corresponded to crystallization of gels in DSC and the activation energy for the crystallization increased with an increase of Al2O3 content. From the XRD analysis including the estimation of lattice parameter, the crystallized phase was confirmed as a solid solution of the tetragonal ZrO2 with Al2O3. Examination by TEM and EDX showed that the powder mixtures after calcination consisted of the homogeneous and very fine grains with the size less than 10 nm.",

keywords = "3Y-ZrO/AlO system, Crystallization behavior, Nanometer-sized powder, Sol-gel process",

author = "Masashi Yoshimura and Oh, \{Sung Tag\} and Mutsuo Sando and Koichi Niihara",

year = "1999",

doi = "10.1016/S0925-8388(99)00213-3",

language = "English",

volume = "290",

pages = "284--289",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

number = "1-2",

}

TY - JOUR

T1 - Crystallization and microstructural characterization of ZrO2 (3 mol% Y2O3) nano-sized powders with various Al2O3 contents

AU - Yoshimura, Masashi

AU - Oh, Sung Tag

AU - Sando, Mutsuo

AU - Niihara, Koichi

PY - 1999

Y1 - 1999

N2 - 3Y-ZrO2 gels containing 0-40 mol% Al2O3 were obtained by a sol-gel process with isopropoxide precursors. Crystallization behavior and microstructural characterization of the dried gels and calcined powders were studied by DSC, in situ XRD and TEM. The peak temperature of the exotherm corresponded to crystallization of gels in DSC and the activation energy for the crystallization increased with an increase of Al2O3 content. From the XRD analysis including the estimation of lattice parameter, the crystallized phase was confirmed as a solid solution of the tetragonal ZrO2 with Al2O3. Examination by TEM and EDX showed that the powder mixtures after calcination consisted of the homogeneous and very fine grains with the size less than 10 nm.

AB - 3Y-ZrO2 gels containing 0-40 mol% Al2O3 were obtained by a sol-gel process with isopropoxide precursors. Crystallization behavior and microstructural characterization of the dried gels and calcined powders were studied by DSC, in situ XRD and TEM. The peak temperature of the exotherm corresponded to crystallization of gels in DSC and the activation energy for the crystallization increased with an increase of Al2O3 content. From the XRD analysis including the estimation of lattice parameter, the crystallized phase was confirmed as a solid solution of the tetragonal ZrO2 with Al2O3. Examination by TEM and EDX showed that the powder mixtures after calcination consisted of the homogeneous and very fine grains with the size less than 10 nm.

KW - 3Y-ZrO/AlO system

KW - Crystallization behavior

KW - Nanometer-sized powder

KW - Sol-gel process

UR - http://www.scopus.com/inward/record.url?scp=0032636994&partnerID=8YFLogxK

U2 - 10.1016/S0925-8388(99)00213-3

DO - 10.1016/S0925-8388(99)00213-3

M3 - Article

AN - SCOPUS:0032636994

SN - 0925-8388

VL - 290

SP - 284

EP - 289

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Crystallization and microstructural characterization of ZrO₂ (3 mol% Y₂O₃) nano-sized powders with various Al₂O₃ contents

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this