Highly transparent lutetium titanium oxide produced by spark plasma sintering

An, Liqiong; Ito, Akihiko; Goto, Takashi

doi:10.1016/j.jeurceramsoc.2010.09.010

Cited by 39 publications

(18 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in contrast to the normal grain growth of grains with almost faceted grain boundaries at the final-stage sintering (Fig. 1b) [132,133], where growth is curvature driven, and its rate, dL/dt is proportional to the inverse of the grain radius, according to:…”

Section: Grain Growth Under External Pressurementioning

confidence: 88%

Grain growth during spark plasma and flash sintering of ceramic nanoparticles: a review

et al. 2017

View full text Add to dashboard Cite

Spark plasma and flash sintering process characteristics together with their corresponding sintering and densification mechanisms and field effects were briefly reviewed. The enhanced and inhibited grain growth obtained using these field-assisted densification techniques were reported for different ceramic nanoparticle systems and related to their respective densification mechanisms. When the densification is aided by plastic deformation, the kinetics of grain growth depends on the particles' rotation/sliding rate and is controlled by lattice and pipe diffusion. When the densification is aided by spark, plasma, and the particles' surface softening, grain growth kinetics is controlled by viscous diffusion and interface reactions. Grain growth in both cases is hierarchical by grain rotation, grain cluster formation and sliding, as long as the plastic deformation proceeds or as long as plasma exists. Densification by diffusion in a solid state via defects leads to normal grain growth, which takes over at the final stage of sintering. Various field effects, as well as the effect of external pressure on the grain growth behaviour were also addressed.

show abstract

Section: Grain Growth Under External Pressurementioning

confidence: 88%

Grain growth during spark plasma and flash sintering of ceramic nanoparticles: a review

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Their mainly potential applications are scintillator hosts as most of them have high density and effective atomic number, which would gain higher X-ray or γ-ray stopping power. Then, many transparent ceramics with the composition of A 2 B 2 O 7 were fabricated in recent years, such as La 2 Hf 2 O 7 [41,42], La 2-x Gd x Hf 2 O 7 [43,44], La 2 Zr 2 O 7 [45], Nd 2 Zr 2 O 7 [46], La 2-x Gd x Zr 2 O 7 [47,48], La 2-x Lu x Zr 2 O 7 [49], and Lu 2 Ti 2 O 7 [50]. Also, rare earth ion doped A 2 B 2 O 7 system transparent ceramics [42,[51][52][53][54] were fabricated to study their luminescent properties.…”

Section: Introduction mentioning

confidence: 99%

Recent development of A2B2O7 system transparent ceramics

et al. 2018

View full text Add to dashboard Cite

A 2 B 2 O 7 system compounds, which usually present three phase structures mainly based on the ionic radius ratios of r A and r B (r A /r B), have been studied for potential applications in many fields, such as thermal barrier coatings, luminescence powders, fast-ion conductors, photocatalysts, and matrices for immobilization of highly active radionuclides. Since 2005, La 2 Hf 2 O 7 was fabricated into transparent ceramics and much more attentions were paid on A 2 B 2 O 7 transparent ceramics for new applications. In this review, the development of A 2 B 2 O 7 system transparent ceramics was described. The structure characteristics, powder synthesis method, and sintering techniques of the final A 2 B 2 O 7 transparent ceramics were summarized. After that, the mostly reported A 2 Hf 2 O 7 , A 2 Zr 2 O 7 , and A 2 Ti 2 O 7 system transparent ceramics were systematically introduced. The potential application fields and future development trends were also discussed, focusing on scintillators, optical elements, and other luminescent materials.

show abstract

“…Lu 2 Ti 2 O 7 may be applicable in optical imaging systems due to its high refractive index 13 . Recently, we have reported the fabrication of transparent Lu 2 Ti 2 O 7 by reactive method using spark plasma sintering (SPS) with commercially available powders 14 . In this study, the effects of sintering and annealing temperature on the microstructure, optical, and mechanical properties of Lu 2 Ti 2 O 7 bodies were investigated in detail.…”

Section: Introductionmentioning

confidence: 99%

Effects of Sintering and Annealing Temperature on Fabrication of Transparent Lu₂Ti₂O₇ by Spark Plasma Sintering

Ito

Goto

2011

J. Am. Ceram. Soc.

Self Cite

View full text Add to dashboard Cite

Transparent lutetium titanate (Lu2Ti2O7) was fabricated by reactive spark plasma sintering. Effects of sintering and annealing temperature on the microstructure, optical and mechanical properties of Lu2Ti2O7 bodies were investigated. Pyrochlore Lu2Ti2O7 was obtained at above 1273 K and a full dense specimen was obtained above 1373 K. The average grain size increased from 0.22 to 10.85 μm up to 1773 K and abnormal grain growth occurred at 1823 K. The Lu2Ti2O7 body obtained at 1723 K for 2.7 ks for sintering and 1023 K for 21.6 ks for annealing shows the maximum transmittance with a thickness of 1 mm of 74% at a wavelength of 2000 nm. The hardness was dependent on the relative density and the grain size, while the fracture toughness slightly decreased with increasing annealing and sintering temperatures.

show abstract

Highly transparent lutetium titanium oxide produced by spark plasma sintering

Cited by 39 publications

References 17 publications

Grain growth during spark plasma and flash sintering of ceramic nanoparticles: a review

Grain growth during spark plasma and flash sintering of ceramic nanoparticles: a review

Recent development of A2B2O7 system transparent ceramics

Effects of Sintering and Annealing Temperature on Fabrication of Transparent Lu₂Ti₂O₇ by Spark Plasma Sintering

Contact Info

Product

Resources

About

Highly transparent lutetium titanium oxide produced by spark plasma sintering

Cited by 39 publications

References 17 publications

Grain growth during spark plasma and flash sintering of ceramic nanoparticles: a review

Grain growth during spark plasma and flash sintering of ceramic nanoparticles: a review

Recent development of A2B2O7 system transparent ceramics

Effects of Sintering and Annealing Temperature on Fabrication of Transparent Lu2Ti2O7 by Spark Plasma Sintering

Contact Info

Product

Resources

About

Effects of Sintering and Annealing Temperature on Fabrication of Transparent Lu₂Ti₂O₇ by Spark Plasma Sintering