Transparent yttria produced by spark plasma sintering at moderate temperature and pressure profiles

An, Liqiong; Ito, Akihiko; Goto, Takashi

doi:10.1016/j.jeurceramsoc.2011.11.023

Cited by 77 publications

(45 citation statements)

References 29 publications

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“…Although recent studies have shown that SPS is effective in fabricating transparent YAG, Y 2 O 3 , and MgAl 2 O 4 ceramics, SPS studies on transparent laser ceramics have been limited to Nd:Lu 2 O 3 and Er:YAG, to the best of our knowledge. In these ceramics, LiF was used as sintering additive and the average grain size reached ~8 μm, which is larger than or equal to conventional laser ceramics.…”

Section: Introductionmentioning

confidence: 99%

Transparent ultrafine Yb³⁺:Y₂O₃ laser ceramics fabricated by spark plasma sintering

et al. 2017

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Conventional ceramic processing techniques do not produce ultrafine‐grained materials. However, since the mechanical and optical properties are highly dependent on the grain size, advanced processing techniques are needed to obtain ceramics with a grain size smaller than the wavelength of visible light for new laser sources. As an empirical study for lasing from an ultrafine‐grained ceramics, transparent Yb3+:Y2O3 ceramics with several doping concentrations were fabricated by spark plasma sintering (SPS) and their microstructures were analyzed, along with optical and spectroscopic properties. Laser oscillation was verified for 10 at.% Yb3+:Y2O3 ceramics. The laser ceramics in our study were sintered without sintering additives, and the SPS produced an ultrafine microstructure with an average grain size of 261 nm, which is about one order of magnitude smaller than that of ceramics sintered by conventional techniques. A load was applied during heating to enhance densification, and an in‐line transmittance near the theoretical value was obtained. An analysis of the crystal structure confirmed that the Yb3+:Y2O3 ceramics were in a solid solution. To the best of our knowledge, this study is the first report verifying the lasing properties of not only ultrafine‐grained but also Yb‐doped ceramics obtained by SPS.

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Section: Introductionmentioning

confidence: 99%

Transparent ultrafine Yb³⁺:Y₂O₃ laser ceramics fabricated by spark plasma sintering

et al. 2017

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“…As-received, undoped [99] As-received, undoped Two-step Pressure [87] Lab-made, Yb 2 O 3 -doped [ YAG undoped [107] undoped &LiF-doped [108] Lab-made, undoped [109] Oxyapatite Lab-made, undoped [110] Lab-made, undoped High-pssure [111] Mullite Lab-made, undoped [112]…”

Section: Dopants Remarksmentioning

confidence: 99%

Pulsed Electric Current Sintering of Transparent Alumina Ceramics

Nanko¹,

Dang²

2015

Sintering Techniques of Materials

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“…Spark plasma sintering is for fabrication of transparent ceramics with submicron grains. The distinctive features of the SPS process are fast densification, short holding time, and low sintering temperature . The rapid sintering and densification in SPS were related to the thermal processes at the free surfaces of the powder particles.…”

Section: Introductionmentioning

confidence: 99%

The effect of SPS parameters on the production of yttria transparent ceramic

Amirzadeh-Fotovat

Hatefi

2019

Int J Applied Ceramic Tech

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In this work, the spark plasma sintering (SPS) of commercial yttria nanopowder is investigated. The SPS parameters such as sintering temperature, applied pressure, and dwell time are varied. Densification without grain growth occurring at occurred up to a sintering temperature of 1400°C and grain growth without further densification taking place at the higher temperature. The optimum sample was obtained at a temperature of 1400°C with a pressure of 70 MPa and dwelling time of 15 minutes. The highest relative density of 99.8% and the average grain size of 1.26 μm were obtained at 1400°C. The yttria ceramic annealed at 1200°C had the in-line transmission of 5%-70% and 70%-82% in the visible and infrared wavelength region, respectively. The measurements of hardness and fracture toughness characteristics of the transparent yttria ceramic showed 9.2 GPa and 2.24 MPa.m 1/2 , respectively. K E Y W O R D S dwell time, sintering pressure, sintering temperature, spark plasma sintering, yttria How to cite this article: Amirzadeh-Fotovat V, Hatefi Y. The effect of SPS parameters on the production of yttria transparent ceramic. Int J Appl

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Transparent yttria produced by spark plasma sintering at moderate temperature and pressure profiles

Cited by 77 publications

References 29 publications

Transparent ultrafine Yb³⁺:Y₂O₃ laser ceramics fabricated by spark plasma sintering

Transparent ultrafine Yb³⁺:Y₂O₃ laser ceramics fabricated by spark plasma sintering

Pulsed Electric Current Sintering of Transparent Alumina Ceramics

The effect of SPS parameters on the production of yttria transparent ceramic

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Transparent yttria produced by spark plasma sintering at moderate temperature and pressure profiles

Cited by 77 publications

References 29 publications

Transparent ultrafine Yb3+:Y2O3 laser ceramics fabricated by spark plasma sintering

Transparent ultrafine Yb3+:Y2O3 laser ceramics fabricated by spark plasma sintering

Pulsed Electric Current Sintering of Transparent Alumina Ceramics

The effect of SPS parameters on the production of yttria transparent ceramic

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Transparent ultrafine Yb³⁺:Y₂O₃ laser ceramics fabricated by spark plasma sintering

Transparent ultrafine Yb³⁺:Y₂O₃ laser ceramics fabricated by spark plasma sintering