Phase transformation kinetics of 3 mol% yttria partially stabilized zirconia (3Y-PSZ) nanopowders prepared by a non-isothermal process

Chih Wei Kuo, Yun-Hwei Shen, Shaw Bing Wen, Huey Er Lee, I. Ming Hung, Hong Hsin Huang, Moo Chin Wang

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A crystalline nanopowder of 3 mol% yttria-partially stabilized zirconia (3Y-PSZ) has been synthesized using ZrOCl2 and Y(NO3) 3 as raw materials throughout a co-precipitation process in an alcohol-water solution. The phase transformation kinetics of the 3Y-PSZ freeze dried precursor powders have been investigated by nonisothermal methods. Differential thermal and thermogravimetric analyses (DTA/TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution TEM (HRTEM) have been utilized to characterize the 3Y-PSZ nanocrystallites. When the 3Y-PSZ freeze dried powders are calcined in the range of 703-1073 K for 2 h, the crystal structure is composed of tetragonal and monoclinic ZrO2. The BET specific surface area of the 3Y-PSZ freeze dried precursor powders calcined at 703 K for 2 h is 118.42 m 2/g, which is equivalent to a crystallite size of 8.14 nm. The activation energy from tetragonal ZrO2 converted to monoclinic ZrO2 in the 3Y-PSZ freeze dried precursor powders was determined as 401.89 kJ/mol. The tetragonal (T) and monoclinic (M) ZrO2 phases coexist with a spherical morphology, and based on TEM examination have a size distribution between 10 and 20 nm. When sintering green compacts of the 3Y-PSZ, a significant linear shrinkage of 8% is observed at about 1283 K. On sintering the densification cycle is complete at approximately 1623 K when a total shrinkage of 32% is observed and a final density above 99% of theoretical was achieved.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalCeramics International
Volume37
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

Fingerprint

Yttria stabilized zirconia
Phase transitions
Kinetics
Powders
Sintering
Transmission electron microscopy
Nanocrystallites
Crystallite size
Coprecipitation
High resolution transmission electron microscopy
Densification
Specific surface area
Raw materials
Alcohols
Activation energy
Crystal structure
Crystalline materials
X ray diffraction
Scanning electron microscopy
Water

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Kuo, Chih Wei ; Shen, Yun-Hwei ; Wen, Shaw Bing ; Lee, Huey Er ; Hung, I. Ming ; Huang, Hong Hsin ; Wang, Moo Chin. / Phase transformation kinetics of 3 mol% yttria partially stabilized zirconia (3Y-PSZ) nanopowders prepared by a non-isothermal process. In: Ceramics International. 2011 ; Vol. 37, No. 1. pp. 341-347.
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abstract = "A crystalline nanopowder of 3 mol{\%} yttria-partially stabilized zirconia (3Y-PSZ) has been synthesized using ZrOCl2 and Y(NO3) 3 as raw materials throughout a co-precipitation process in an alcohol-water solution. The phase transformation kinetics of the 3Y-PSZ freeze dried precursor powders have been investigated by nonisothermal methods. Differential thermal and thermogravimetric analyses (DTA/TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution TEM (HRTEM) have been utilized to characterize the 3Y-PSZ nanocrystallites. When the 3Y-PSZ freeze dried powders are calcined in the range of 703-1073 K for 2 h, the crystal structure is composed of tetragonal and monoclinic ZrO2. The BET specific surface area of the 3Y-PSZ freeze dried precursor powders calcined at 703 K for 2 h is 118.42 m 2/g, which is equivalent to a crystallite size of 8.14 nm. The activation energy from tetragonal ZrO2 converted to monoclinic ZrO2 in the 3Y-PSZ freeze dried precursor powders was determined as 401.89 kJ/mol. The tetragonal (T) and monoclinic (M) ZrO2 phases coexist with a spherical morphology, and based on TEM examination have a size distribution between 10 and 20 nm. When sintering green compacts of the 3Y-PSZ, a significant linear shrinkage of 8{\%} is observed at about 1283 K. On sintering the densification cycle is complete at approximately 1623 K when a total shrinkage of 32{\%} is observed and a final density above 99{\%} of theoretical was achieved.",
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Phase transformation kinetics of 3 mol% yttria partially stabilized zirconia (3Y-PSZ) nanopowders prepared by a non-isothermal process. / Kuo, Chih Wei; Shen, Yun-Hwei; Wen, Shaw Bing; Lee, Huey Er; Hung, I. Ming; Huang, Hong Hsin; Wang, Moo Chin.

In: Ceramics International, Vol. 37, No. 1, 01.01.2011, p. 341-347.

Research output: Contribution to journalArticle

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AU - Kuo, Chih Wei

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AB - A crystalline nanopowder of 3 mol% yttria-partially stabilized zirconia (3Y-PSZ) has been synthesized using ZrOCl2 and Y(NO3) 3 as raw materials throughout a co-precipitation process in an alcohol-water solution. The phase transformation kinetics of the 3Y-PSZ freeze dried precursor powders have been investigated by nonisothermal methods. Differential thermal and thermogravimetric analyses (DTA/TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution TEM (HRTEM) have been utilized to characterize the 3Y-PSZ nanocrystallites. When the 3Y-PSZ freeze dried powders are calcined in the range of 703-1073 K for 2 h, the crystal structure is composed of tetragonal and monoclinic ZrO2. The BET specific surface area of the 3Y-PSZ freeze dried precursor powders calcined at 703 K for 2 h is 118.42 m 2/g, which is equivalent to a crystallite size of 8.14 nm. The activation energy from tetragonal ZrO2 converted to monoclinic ZrO2 in the 3Y-PSZ freeze dried precursor powders was determined as 401.89 kJ/mol. The tetragonal (T) and monoclinic (M) ZrO2 phases coexist with a spherical morphology, and based on TEM examination have a size distribution between 10 and 20 nm. When sintering green compacts of the 3Y-PSZ, a significant linear shrinkage of 8% is observed at about 1283 K. On sintering the densification cycle is complete at approximately 1623 K when a total shrinkage of 32% is observed and a final density above 99% of theoretical was achieved.

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