Transparent Er2O3 ceramics fabricated by high-pressure spark plasma sintering

Barak Ratzker; Avital Wagner; Sergey Kalabukhov; Nachum Frage

doi:10.1016/j.jeurceramsoc.2020.05.056

Transparent Er₂O₃ ceramics fabricated by high-pressure spark plasma sintering

Barak Ratzker
, Avital Wagner
, Sergey Kalabukhov
, Nachum Frage

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Fabrication of transparent Er₂O₃ ceramics was carried out by high-pressure spark plasma sintering (HP-SPS). The color and in-line transmittance of these ceramics was highly sensitive to the sintering parameters. Samples exhibited a strong pink or wine color after sintering at 1150 °C under 600 MPa or 1250 °C under 250 MPa, respectively. This was confirmed to be a result of oxygen vacancies created during the sintering process and high sensitivity of Er₂O₃ to the strong reducing atmosphere in the SPS apparatus. Post-sintering annealing in an air furnace led to elimination of oxygen vacancies and increased transparency. Additionally, the photoluminescence intensity and phosphorescence lifetime of annealed (pink) samples was higher and shorter, respectively, compared to that of the reduced (wine-colored) samples.

Original language	English
Pages (from-to)	4700-4703
Number of pages	4
Journal	Journal of the European Ceramic Society
Volume	40
Issue number	13
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2020.05.056
State	Published - 1 Oct 2020

Keywords

ErO (erbium oxide)
High-pressure spark plasma sintering (HP-SPS)
Optical properties
Transparent ceramic

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2020.05.056

Cite this

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title = "Transparent Er2O3 ceramics fabricated by high-pressure spark plasma sintering",

abstract = "Fabrication of transparent Er2O3 ceramics was carried out by high-pressure spark plasma sintering (HP-SPS). The color and in-line transmittance of these ceramics was highly sensitive to the sintering parameters. Samples exhibited a strong pink or wine color after sintering at 1150 °C under 600 MPa or 1250 °C under 250 MPa, respectively. This was confirmed to be a result of oxygen vacancies created during the sintering process and high sensitivity of Er2O3 to the strong reducing atmosphere in the SPS apparatus. Post-sintering annealing in an air furnace led to elimination of oxygen vacancies and increased transparency. Additionally, the photoluminescence intensity and phosphorescence lifetime of annealed (pink) samples was higher and shorter, respectively, compared to that of the reduced (wine-colored) samples.",

keywords = "ErO (erbium oxide), High-pressure spark plasma sintering (HP-SPS), Optical properties, Transparent ceramic",

author = "Barak Ratzker and Avital Wagner and Sergey Kalabukhov and Nachum Frage",

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AU - Ratzker, Barak

AU - Wagner, Avital

AU - Kalabukhov, Sergey

AU - Frage, Nachum

PY - 2020/10/1

Y1 - 2020/10/1

N2 - Fabrication of transparent Er2O3 ceramics was carried out by high-pressure spark plasma sintering (HP-SPS). The color and in-line transmittance of these ceramics was highly sensitive to the sintering parameters. Samples exhibited a strong pink or wine color after sintering at 1150 °C under 600 MPa or 1250 °C under 250 MPa, respectively. This was confirmed to be a result of oxygen vacancies created during the sintering process and high sensitivity of Er2O3 to the strong reducing atmosphere in the SPS apparatus. Post-sintering annealing in an air furnace led to elimination of oxygen vacancies and increased transparency. Additionally, the photoluminescence intensity and phosphorescence lifetime of annealed (pink) samples was higher and shorter, respectively, compared to that of the reduced (wine-colored) samples.

AB - Fabrication of transparent Er2O3 ceramics was carried out by high-pressure spark plasma sintering (HP-SPS). The color and in-line transmittance of these ceramics was highly sensitive to the sintering parameters. Samples exhibited a strong pink or wine color after sintering at 1150 °C under 600 MPa or 1250 °C under 250 MPa, respectively. This was confirmed to be a result of oxygen vacancies created during the sintering process and high sensitivity of Er2O3 to the strong reducing atmosphere in the SPS apparatus. Post-sintering annealing in an air furnace led to elimination of oxygen vacancies and increased transparency. Additionally, the photoluminescence intensity and phosphorescence lifetime of annealed (pink) samples was higher and shorter, respectively, compared to that of the reduced (wine-colored) samples.

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KW - High-pressure spark plasma sintering (HP-SPS)

KW - Optical properties

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