Phase transition and crystal growth of YSZ nanoparticles with various Y 2 O 3 contents prepared by sol-gel process

Chih Wei Kuo, Yueh Hsun Lee, Kuan-Zong Fung, Moo Chin Wang

Research output: Contribution to conferencePaper

Abstract

The phase transition and growth of yttria-stabilized zirconia (YSZ) nanocrystallites prepared by a sol-gel process with various amounts of ZrOCl 2 ·8H 2 O and Y(NO 3 ) 3 ·6H 2 O in ethanol-water solutions at low temperatures were studied. DTA/TGA, XRD, and TEM were used to characterize the YSZ nanocrystallites. The crystallization temperature of 3YSZ, in which Y 2 O 3 /(Y 2 O 3 +ZrO 2 ) = 0.03 gel powders, estimated by DTA/TG is about 427°C. When 3YSZ and 5YSZ gels were calcined at 500°C, their crystal structures were composed of coexisting tetragonal and monoclinic ZrO 2 . Cubic ZrO 2 was obtained when added Y 2 O 3 was greater than 8 mol%. A nanocrystallite size distribution between 10 and 20 nm was obtained from TEM observations.

Original languageEnglish
Pages986-991
Number of pages6
Publication statusPublished - 2005 Dec 1
Event9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada
Duration: 2005 May 152005 May 20

Other

Other9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
CountryCanada
CityQuebec
Period05-05-1505-05-20

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Nanocrystallites
Yttria stabilized zirconia
Crystal growth
Differential thermal analysis
Sol-gel process
Gels
Phase transitions
Nanoparticles
Transmission electron microscopy
Ethanol
Crystal structure
Crystallization
Powders
Temperature
Water

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kuo, C. W., Lee, Y. H., Fung, K-Z., & Wang, M. C. (2005). Phase transition and crystal growth of YSZ nanoparticles with various Y 2 O 3 contents prepared by sol-gel process . 986-991. Paper presented at 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX, Quebec, Canada.
Kuo, Chih Wei ; Lee, Yueh Hsun ; Fung, Kuan-Zong ; Wang, Moo Chin. / Phase transition and crystal growth of YSZ nanoparticles with various Y 2 O 3 contents prepared by sol-gel process Paper presented at 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX, Quebec, Canada.6 p.
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Kuo, CW, Lee, YH, Fung, K-Z & Wang, MC 2005, ' Phase transition and crystal growth of YSZ nanoparticles with various Y 2 O 3 contents prepared by sol-gel process ', Paper presented at 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX, Quebec, Canada, 05-05-15 - 05-05-20 pp. 986-991.

Phase transition and crystal growth of YSZ nanoparticles with various Y 2 O 3 contents prepared by sol-gel process . / Kuo, Chih Wei; Lee, Yueh Hsun; Fung, Kuan-Zong; Wang, Moo Chin.

2005. 986-991 Paper presented at 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX, Quebec, Canada.

Research output: Contribution to conferencePaper

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N2 - The phase transition and growth of yttria-stabilized zirconia (YSZ) nanocrystallites prepared by a sol-gel process with various amounts of ZrOCl 2 ·8H 2 O and Y(NO 3 ) 3 ·6H 2 O in ethanol-water solutions at low temperatures were studied. DTA/TGA, XRD, and TEM were used to characterize the YSZ nanocrystallites. The crystallization temperature of 3YSZ, in which Y 2 O 3 /(Y 2 O 3 +ZrO 2 ) = 0.03 gel powders, estimated by DTA/TG is about 427°C. When 3YSZ and 5YSZ gels were calcined at 500°C, their crystal structures were composed of coexisting tetragonal and monoclinic ZrO 2 . Cubic ZrO 2 was obtained when added Y 2 O 3 was greater than 8 mol%. A nanocrystallite size distribution between 10 and 20 nm was obtained from TEM observations.

AB - The phase transition and growth of yttria-stabilized zirconia (YSZ) nanocrystallites prepared by a sol-gel process with various amounts of ZrOCl 2 ·8H 2 O and Y(NO 3 ) 3 ·6H 2 O in ethanol-water solutions at low temperatures were studied. DTA/TGA, XRD, and TEM were used to characterize the YSZ nanocrystallites. The crystallization temperature of 3YSZ, in which Y 2 O 3 /(Y 2 O 3 +ZrO 2 ) = 0.03 gel powders, estimated by DTA/TG is about 427°C. When 3YSZ and 5YSZ gels were calcined at 500°C, their crystal structures were composed of coexisting tetragonal and monoclinic ZrO 2 . Cubic ZrO 2 was obtained when added Y 2 O 3 was greater than 8 mol%. A nanocrystallite size distribution between 10 and 20 nm was obtained from TEM observations.

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Kuo CW, Lee YH, Fung K-Z, Wang MC. Phase transition and crystal growth of YSZ nanoparticles with various Y 2 O 3 contents prepared by sol-gel process . 2005. Paper presented at 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX, Quebec, Canada.