Sintering and grain growth in SiO2 doped Nd:YAG

Sujarinee Kochawattana, Adam Stevenson, Sang Ho Lee, Mariola Ramirez, Venkatraman Gopalan, John Dumm, Vida K. Castillo, Gregory J. Quarles, Gary Lynn Messing

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Densification and grain growth in pure YAG, SiO2 doped YAG and SiO2 doped Nd:YAG were explored. The activation energy for densification (235 kJ/mol) in pure YAG is lower than that of grain growth (946 kJ/mol) which is unusual in ceramic systems. Consequently, pure YAG sinters to near full density (>99.9%) at 1700 °C with little grain growth (1.2 μm average grain size). The remaining large pores (radius > 2 μm) were determined to be thermodynamically stable because their coordination number with grains was >6. The stability of these pores underscores the importance of powder processing and forming in fabricating transparent YAG. SiO2 doped YAG sinters to near full density 100 °C lower than pure YAG because SiO2 enables liquid phase sintering and the removal of large pores. The addition of Nd2O3 further enhances both densification and grain growth at temperatures below 1700 °C. Above 1700 °C higher concentrations of Nd3+ suppressed grain growth, possibly due to solute drag.

Original languageEnglish (US)
Pages (from-to)1527-1534
Number of pages8
JournalJournal of the European Ceramic Society
Volume28
Issue number7
DOIs
StatePublished - Jan 18 2008

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Grain growth
Sintering
Densification
Liquid phase sintering
Powders
Drag
Activation energy
Processing
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Kochawattana, Sujarinee ; Stevenson, Adam ; Lee, Sang Ho ; Ramirez, Mariola ; Gopalan, Venkatraman ; Dumm, John ; Castillo, Vida K. ; Quarles, Gregory J. ; Messing, Gary Lynn. / Sintering and grain growth in SiO2 doped Nd:YAG. In: Journal of the European Ceramic Society. 2008 ; Vol. 28, No. 7. pp. 1527-1534.
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abstract = "Densification and grain growth in pure YAG, SiO2 doped YAG and SiO2 doped Nd:YAG were explored. The activation energy for densification (235 kJ/mol) in pure YAG is lower than that of grain growth (946 kJ/mol) which is unusual in ceramic systems. Consequently, pure YAG sinters to near full density (>99.9{\%}) at 1700 °C with little grain growth (1.2 μm average grain size). The remaining large pores (radius > 2 μm) were determined to be thermodynamically stable because their coordination number with grains was >6. The stability of these pores underscores the importance of powder processing and forming in fabricating transparent YAG. SiO2 doped YAG sinters to near full density 100 °C lower than pure YAG because SiO2 enables liquid phase sintering and the removal of large pores. The addition of Nd2O3 further enhances both densification and grain growth at temperatures below 1700 °C. Above 1700 °C higher concentrations of Nd3+ suppressed grain growth, possibly due to solute drag.",
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Kochawattana, S, Stevenson, A, Lee, SH, Ramirez, M, Gopalan, V, Dumm, J, Castillo, VK, Quarles, GJ & Messing, GL 2008, 'Sintering and grain growth in SiO2 doped Nd:YAG', Journal of the European Ceramic Society, vol. 28, no. 7, pp. 1527-1534. https://doi.org/10.1016/j.jeurceramsoc.2007.12.006

Sintering and grain growth in SiO2 doped Nd:YAG. / Kochawattana, Sujarinee; Stevenson, Adam; Lee, Sang Ho; Ramirez, Mariola; Gopalan, Venkatraman; Dumm, John; Castillo, Vida K.; Quarles, Gregory J.; Messing, Gary Lynn.

In: Journal of the European Ceramic Society, Vol. 28, No. 7, 18.01.2008, p. 1527-1534.

Research output: Contribution to journalArticle

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AU - Kochawattana, Sujarinee

AU - Stevenson, Adam

AU - Lee, Sang Ho

AU - Ramirez, Mariola

AU - Gopalan, Venkatraman

AU - Dumm, John

AU - Castillo, Vida K.

AU - Quarles, Gregory J.

AU - Messing, Gary Lynn

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N2 - Densification and grain growth in pure YAG, SiO2 doped YAG and SiO2 doped Nd:YAG were explored. The activation energy for densification (235 kJ/mol) in pure YAG is lower than that of grain growth (946 kJ/mol) which is unusual in ceramic systems. Consequently, pure YAG sinters to near full density (>99.9%) at 1700 °C with little grain growth (1.2 μm average grain size). The remaining large pores (radius > 2 μm) were determined to be thermodynamically stable because their coordination number with grains was >6. The stability of these pores underscores the importance of powder processing and forming in fabricating transparent YAG. SiO2 doped YAG sinters to near full density 100 °C lower than pure YAG because SiO2 enables liquid phase sintering and the removal of large pores. The addition of Nd2O3 further enhances both densification and grain growth at temperatures below 1700 °C. Above 1700 °C higher concentrations of Nd3+ suppressed grain growth, possibly due to solute drag.

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