Fabrication of highly transparent Er3+, Yb3+:Y2O3 ceramics with La2O3/ZrO2 as sintering additives and the near-infrared and upconversion luminescence properties

Wang, Nengli; Zhang, Xiyan; Bai, Zhiyong

doi:10.1016/j.jallcom.2020.155932

Cited by 9 publications

(2 citation statements)

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“…In previous studies, the addition of La 2 O 3 effectively increased the sintering density and improved the transparency of the ceramics. 31,32 In addition, the X-ray excitation emission spectrum of Eu-doped Y 2 O 3 -based ceramics, with an emission at around 610 nm, is close to the peak of the response curve of the Charge-coupled Device (CCD). Therefore, further enhancement of the transmittance of Eu-doped Y 2 O 3 ceramics can improve the resolution and contrast of high-resolution X-ray imaging applications.…”

Section: Introductionmentioning

confidence: 73%

Eu-doped (Y_0.85−xLa_0.15)₂O₃sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

Feng

Lü

et al. 2023

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 73%

Eu-doped (Y_0.85−xLa_0.15)₂O₃sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

Feng

Lü

et al. 2023

J. Mater. Chem. C

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“…The fourth is that besides the effect of grain refinement, La 2 O 3 addition to the 1 wt.% MgO-HA enhances the sintering activity and diffusion during sintering, thus increasing the density of the MgO-HA sample. La 2 O 3 assisted the formation of more dense ceramics due to the inhibition of excessive grain growth [85]. Densification at around 90% is desirable because of the presence of a certain degree of porosity as well as of reabsorbable phases contributing to bone intergrowth and a subse-quent implant-bone interfacial adhesion [86].…”

Section: Resultsmentioning

confidence: 99%

The effect of lanthanum addition on the microstructure and mechanical properties of Mg-modified hydroxyapatite ceramics

Pazarlıoğlu

Algan

Isikogullari

et al. 2021

PAC

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In the present paper, the effect of La2O3 (0.25, 0.5 and 1 wt.%) addition on the phase stability, porosity, density, hardness, fracture toughness, compressive strength and brittleness index of hydroxyapatite modified with 1 wt.% of MgO was investigated. Hydroxyapatite (HA) without additives sintered at 1300?C has mixture of dominant hydroxyapatite phase with beta-tricalcium phosphate (?-TCP), alpha-tricalcium phosphate (?-TCP) and calcium oxide (CaO) phases. The microstructure is characterized with transgranular microcracks and oversized grains. Although the density and hardness of the pure HA increased with increasing temperature, a steady decrease in fracture toughness (from 0.96 to 0.71MPa?m1/2) and compressive strength (from 130.2 to 65.6MPa) was observed. For the HA modified with 1 wt.% of MgO the highest compressive strength (183.2MPa) and fracture toughness (1.47MPa?m1/2) were obtained at 1200?C and at this temperature the brittleness index was 3.24 ?m-1/2. Increase in the sintering temperature led to the increase of the brittleness index of the pure HA,MgO modified HA and La2O3-MgO modified HA samples. The addition of 1 wt.%La2O3 to 1 wt.% MgO-HA contributed to the increase in the compressive strength of about 10%(from 183.2 to 202.0MPa), fracture toughness of about 69% (from 1.37 to 2.32MPa?m1/2) and also decrease of the brittleness index from 3.24 to 2.18 ?m-1/2. The best performance after sintering at 1300?C was obtained for the MgO-HA sample with 0.25wt.% La2O3. As a result of this study, a new candidate material for biomedical application with superior mechanical properties and the phases that do not cause adverse reactions in the human body could be 1 wt.% MgO-HA modified with 1 wt.% La2O3 and sintered at 1200?C.

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Synthesis of nanoparticles of La2O3 and Ln3+: La2O3 phosphors by aloe vera gel-assisted precipitation method and study of their photoluminescence properties

Shah,

Agheda,

Ahire

et al. 2023

Bull Mater Sci

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Fabrication of highly transparent Er3+, Yb3+:Y2O3 ceramics with La2O3/ZrO2 as sintering additives and the near-infrared and upconversion luminescence properties

Cited by 9 publications

References 41 publications

Eu-doped (Y_0.85−xLa_0.15)₂O₃sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

Eu-doped (Y_0.85−xLa_0.15)₂O₃sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

The effect of lanthanum addition on the microstructure and mechanical properties of Mg-modified hydroxyapatite ceramics

Synthesis of nanoparticles of La2O3 and Ln3+: La2O3 phosphors by aloe vera gel-assisted precipitation method and study of their photoluminescence properties

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Fabrication of highly transparent Er3+, Yb3+:Y2O3 ceramics with La2O3/ZrO2 as sintering additives and the near-infrared and upconversion luminescence properties

Cited by 9 publications

References 41 publications

Eu-doped (Y0.85−xLa0.15)2O3sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

Eu-doped (Y0.85−xLa0.15)2O3sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

The effect of lanthanum addition on the microstructure and mechanical properties of Mg-modified hydroxyapatite ceramics

Synthesis of nanoparticles of La2O3 and Ln3+: La2O3 phosphors by aloe vera gel-assisted precipitation method and study of their photoluminescence properties

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Product

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Eu-doped (Y_0.85−xLa_0.15)₂O₃sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging

Eu-doped (Y_0.85−xLa_0.15)₂O₃sesquioxide transparent ceramics for high-spatial-resolution X-ray imaging