Hot isostatic pressing of transparent nd:Yag ceramics

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

Research output: Contribution to journalArticlepeer-review

129 Scopus citations

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 2009

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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