Effect of SiO2 on densification and microstructure development in Nd:YAG transparent ceramics

Adam J. Stevenson; Xin Li; Miguel A. Martinez; Julie M. Anderson; Daniel L. Suchy; Elizabeth R. Kupp; Elizabeth C. Dickey; Karl T. Mueller; Gary L. Messing

doi:10.1111/j.1551-2916.2010.04260.x

Effect of SiO₂ on densification and microstructure development in Nd:YAG transparent ceramics

Adam J. Stevenson, Xin Li, Miguel A. Martinez, Julie M. Anderson, Daniel L. Suchy, Elizabeth R. Kupp, Elizabeth C. Dickey, Karl T. Mueller, Gary L. Messing

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Abstract

This paper examines the influence of SiO₂ doping on densification and microstructure evolution in Nd_3xY _3-3xAl₅O₁₂ (Nd:YAG) ceramics. Nd:YAG powders were doped with 0.035-0.28 wt% SiO₂ and vacuum sintered between 1484° and 1750°C. ²⁹Si magic-angle spinning nuclear magnetic resonance showed that Si⁴⁺ substitutes onto tetrahedrally coordinated Al³⁺ sites. High-resolution transmission electron microscopy showed no grain boundary second phases for all silica levels in samples sintered at 1600°-1750°C. Coarsening was limited by a solute drag mechanism as suggested by cubic grain growth kinetics and transmission electron microscopy energy-dispersive X-ray spectroscopy observations of increased Nd³⁺ concentration near grain boundaries. Increasing SiO₂ content increased both densification and grain growth rate and led to increasingly coarsening-dominated sintering trajectories. Fine-grained (<3 μm), highly transparent (>82% real in-line transmission) ceramics were produced by sintering 0.035 wt% SiO₂-doped ceramics at 1750°C for 8 h. Coarse-grained (18 μm), transparent samples were obtained with 0.28 wt% SiO₂-doped Nd:YAG when sintered at 1600°C for 8 h.

Original language	English (US)
Pages (from-to)	1380-1387
Number of pages	8
Journal	Journal of the American Ceramic Society
Volume	94
Issue number	5
DOIs	https://doi.org/10.1111/j.1551-2916.2010.04260.x
State	Published - May 2011

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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title = "Effect of SiO2 on densification and microstructure development in Nd:YAG transparent ceramics",

abstract = "This paper examines the influence of SiO2 doping on densification and microstructure evolution in Nd3xY 3-3xAl5O12 (Nd:YAG) ceramics. Nd:YAG powders were doped with 0.035-0.28 wt% SiO2 and vacuum sintered between 1484° and 1750°C. 29Si magic-angle spinning nuclear magnetic resonance showed that Si4+ substitutes onto tetrahedrally coordinated Al3+ sites. High-resolution transmission electron microscopy showed no grain boundary second phases for all silica levels in samples sintered at 1600°-1750°C. Coarsening was limited by a solute drag mechanism as suggested by cubic grain growth kinetics and transmission electron microscopy energy-dispersive X-ray spectroscopy observations of increased Nd3+ concentration near grain boundaries. Increasing SiO2 content increased both densification and grain growth rate and led to increasingly coarsening-dominated sintering trajectories. Fine-grained (<3 μm), highly transparent (>82% real in-line transmission) ceramics were produced by sintering 0.035 wt% SiO2-doped ceramics at 1750°C for 8 h. Coarse-grained (18 μm), transparent samples were obtained with 0.28 wt% SiO2-doped Nd:YAG when sintered at 1600°C for 8 h.",

author = "Stevenson, {Adam J.} and Xin Li and Martinez, {Miguel A.} and Anderson, {Julie M.} and Suchy, {Daniel L.} and Kupp, {Elizabeth R.} and Dickey, {Elizabeth C.} and Mueller, {Karl T.} and Messing, {Gary L.}",

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AU - Stevenson, Adam J.

AU - Li, Xin

AU - Martinez, Miguel A.

AU - Anderson, Julie M.

AU - Suchy, Daniel L.

AU - Kupp, Elizabeth R.

AU - Dickey, Elizabeth C.

AU - Mueller, Karl T.

AU - Messing, Gary L.

PY - 2011/5

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N2 - This paper examines the influence of SiO2 doping on densification and microstructure evolution in Nd3xY 3-3xAl5O12 (Nd:YAG) ceramics. Nd:YAG powders were doped with 0.035-0.28 wt% SiO2 and vacuum sintered between 1484° and 1750°C. 29Si magic-angle spinning nuclear magnetic resonance showed that Si4+ substitutes onto tetrahedrally coordinated Al3+ sites. High-resolution transmission electron microscopy showed no grain boundary second phases for all silica levels in samples sintered at 1600°-1750°C. Coarsening was limited by a solute drag mechanism as suggested by cubic grain growth kinetics and transmission electron microscopy energy-dispersive X-ray spectroscopy observations of increased Nd3+ concentration near grain boundaries. Increasing SiO2 content increased both densification and grain growth rate and led to increasingly coarsening-dominated sintering trajectories. Fine-grained (<3 μm), highly transparent (>82% real in-line transmission) ceramics were produced by sintering 0.035 wt% SiO2-doped ceramics at 1750°C for 8 h. Coarse-grained (18 μm), transparent samples were obtained with 0.28 wt% SiO2-doped Nd:YAG when sintered at 1600°C for 8 h.

AB - This paper examines the influence of SiO2 doping on densification and microstructure evolution in Nd3xY 3-3xAl5O12 (Nd:YAG) ceramics. Nd:YAG powders were doped with 0.035-0.28 wt% SiO2 and vacuum sintered between 1484° and 1750°C. 29Si magic-angle spinning nuclear magnetic resonance showed that Si4+ substitutes onto tetrahedrally coordinated Al3+ sites. High-resolution transmission electron microscopy showed no grain boundary second phases for all silica levels in samples sintered at 1600°-1750°C. Coarsening was limited by a solute drag mechanism as suggested by cubic grain growth kinetics and transmission electron microscopy energy-dispersive X-ray spectroscopy observations of increased Nd3+ concentration near grain boundaries. Increasing SiO2 content increased both densification and grain growth rate and led to increasingly coarsening-dominated sintering trajectories. Fine-grained (<3 μm), highly transparent (>82% real in-line transmission) ceramics were produced by sintering 0.035 wt% SiO2-doped ceramics at 1750°C for 8 h. Coarse-grained (18 μm), transparent samples were obtained with 0.28 wt% SiO2-doped Nd:YAG when sintered at 1600°C for 8 h.

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Effect of SiO₂ on densification and microstructure development in Nd:YAG transparent ceramics

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