Hot isostatic pressing of transparent nd:Yag ceramics

Sang Ho Lee, Elizabeth Rader Kupp, Adam J. Stevenson, Julie M. Anderson, Gary Lynn Messing, Xin Li, Elizabeth C. Dickey, John Q. Dumm, Vida K. Simonaitis-Castillo, Gregory J. Quarles

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Abstract

This paper demonstrates that fine-grained (2-3 μm), transparent Nd:YAG can be achieved at SiO 2 doping levels as low as 0.02 wt% by the sinter plus hot isostatic pressing (HIP) approach. Fine grain size is assured by sintering to 98% density, in order to limit grain growth, followed by HIP. Unlike dry-pressed samples, tape-cast samples were free of large, agglomerate-related pores after sintering, and thus high transparency (i.e., >80% transmission at 1064 nm) could be achieved by HIP at <1750°C along with lower silica levels, thereby avoiding conditions shown to cause exaggerated grain growth. Grain growth was substantially limited at lower SiO 2 levels because silica is soluble in the YAG lattice up to ∼0.02-0.1 wt% at 1750°C, thus allowing sintering and grain growth to occur by solid-state diffusional processes. In contrast, liquid phase enhanced densification and grain growth occur at ∼0.08-0.14 wt% SiO 2, especially at higher temperatures, because the SiO 2 solubility limit is exceeded.

Original languageEnglish (US)
Pages (from-to)1456-1463
Number of pages8
JournalJournal of the American Ceramic Society
Volume92
Issue number7
DOIs
StatePublished - Jul 1 2009

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Lee, S. H., Kupp, E. R., Stevenson, A. J., Anderson, J. M., Messing, G. L., Li, X., Dickey, E. C., Dumm, J. Q., Simonaitis-Castillo, V. K., & Quarles, G. J. (2009). Hot isostatic pressing of transparent nd:Yag ceramics. Journal of the American Ceramic Society, 92(7), 1456-1463. https://doi.org/10.1111/j.1551-2916.2009.03029.x