Journal ArticleDOI
Sintering Behavior and Optical Properties of Yttria
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In this paper, the relative density/grain size trajectory has been drawn and hypotheses concerning the mechanisms controlling grain growth and densification were formulated, and the optical properties were measured in the UV, visible, and infrared ranges.Abstract:
Sintering in air of a pure yttria powder was investigated on green samples shaped by slip casting. The “relative density/grain size” trajectory has been drawn and hypotheses concerning the mechanisms controlling grain growth and densification were formulated. Samples were fully densified by an additional hot isostatic pressing step on pre-sintered samples. After optimal polishing, optical properties were measured in the UV, visible, and infrared ranges.read more
Citations
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Journal ArticleDOI
Fifty Years of Research and Development Coming to Fruition; Unraveling the Complex Interactions during Processing of Transparent Magnesium Aluminate (MgAl2O4) Spinel
TL;DR: In this paper, the state-of-the-art in transparent polycrystalline spinel fabrication is presented, and the interaction between these key variables during processing is discussed.
Journal ArticleDOI
Densification behaviour and microstructural development in undoped yttria prepared by flash-sintering
TL;DR: In this paper, it was shown that undoped yttria-stabilized zirconia can be sintered nearly instantaneously to nearly full density at furnace temperature of 1133°C under a DC applied field of 500 V/cm.
Journal ArticleDOI
ZrO2-doped Y2O3 transparent ceramics via slip casting and vacuum sintering
TL;DR: In this paper, the effects of ZrO 2 addition on the transparency, grain size and lattice parameter of Y 2 O 3 ceramics were studied and it was shown that with the addition of ZRO 2 the transparency increased markedly and the grain size decreased markedly by cation diffusivity mechanism.
Journal ArticleDOI
Sintering of Yb3+:Y2O3 transparent ceramics in hydrogen atmosphere
TL;DR: In this paper, the optical spectroscopic properties of Yb3+:Y2O3 transparent ceramics have also been investigated, which shows that it is a very good laser material for diode laser pumping and short pulse mode-locked laser.
Journal ArticleDOI
Effect of Europium Concentration on Densification of Transparent Eu:Y2O3 Scintillator Ceramics Using Hot Pressing
TL;DR: In this article, Europium (Eu) was found to act as a solid-state sintering aid in Y2O3 optical ceramics by controlling ionic diffusivity, which in turn leads to enhanced optical transparency.
References
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Journal ArticleDOI
Sintering dense nanocrystalline ceramics without final-stage grain growth
I-Wei Chen,Xiaohui Wang +1 more
TL;DR: It is shown that fully dense cubic Y2O3 with a grain size of 60 nm can be prepared by a simple two-step sintering method, at temperatures of about 1,000 °C without applied pressure, and the suppression of the final-stage grain growth is achieved by exploiting the difference in kinetics between grain- boundary diffusion and grain-boundary migration.
Journal ArticleDOI
Master Sintering Curve: A Practical Approach to Sintering
Hunghai Su,D. Lynn Johnson +1 more
TL;DR: In this article, the concept of a master sintering curve has been developed that characterizes the Sintering behavior for a given powder and green-body process regardless of the heating profiles.
Journal ArticleDOI
Two-Step Sintering of Ceramics with Constant Grain-Size, I. Y2O3
TL;DR: In this paper, isothermal and constant-grain-size sintering was carried out to full density in Y2O3 with and without dopants, at as low as 40% of the homologous temperature.
Journal ArticleDOI
Effect of MgO Solute on Microstructure Development in Al2O3
K. A. Berry,Martin P. Harmer +1 more
TL;DR: In this article, the effect of MgO as a solid-solution additive in the sintering of Al2O3 was studied and the separate effects of the additive on densification and grain growth were assessed.
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