Improvement of translucency in Al2O3 ceramics by two-step sintering technique

Dong Suk Kim; Jong Heun Lee; Rak Joo Sung; Sang Woo Kim; Hyung Soo Kim; Jeong Shik Park

doi:10.1016/j.jeurceramsoc.2007.02.002

Improvement of translucency in Al₂O₃ ceramics by two-step sintering technique

Dong Suk Kim, Jong Heun Lee, Rak Joo Sung, Sang Woo Kim, Hyung Soo Kim, Jeong Shik Park

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

48 Citations (Scopus)

Abstract

Pure, 140, 500, and 2500 ppm MgO-doped Al₂O₃ specimens were sintered at 1700 °C in a vacuum with and without pre-sintering heat treatment (HT) at 800 °C for 50 h in air. Pre-sintering HT improved the transmittance in the visible (400-700 nm) range significantly. This enhanced transmittance was explained in terms of the removal of residual pores and the homogenization of the microstructure due to the lowering of the boundary mobility as a result of the MgO addition and the suppression of local densification through a pre-coarsening step.

Original language	English
Pages (from-to)	3629-3632
Number of pages	4
Journal	Journal of the European Ceramic Society
Volume	27
Issue number	13-15
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2007.02.002
Publication status	Published - 2007

Bibliographical note

Funding Information:
This work was supported and funded by Korea Energy Management Corporation and partly by the KOSEF-JSPS Core University Program Japan and Korea.

Keywords

AlO
Lamp envelopes
Optical properties
Sintering

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

Access to Document

10.1016/j.jeurceramsoc.2007.02.002

Cite this

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title = "Improvement of translucency in Al2O3 ceramics by two-step sintering technique",

abstract = "Pure, 140, 500, and 2500 ppm MgO-doped Al2O3 specimens were sintered at 1700 °C in a vacuum with and without pre-sintering heat treatment (HT) at 800 °C for 50 h in air. Pre-sintering HT improved the transmittance in the visible (400-700 nm) range significantly. This enhanced transmittance was explained in terms of the removal of residual pores and the homogenization of the microstructure due to the lowering of the boundary mobility as a result of the MgO addition and the suppression of local densification through a pre-coarsening step.",

keywords = "AlO, Lamp envelopes, Optical properties, Sintering",

author = "Kim, {Dong Suk} and Lee, {Jong Heun} and Sung, {Rak Joo} and Kim, {Sang Woo} and Kim, {Hyung Soo} and Park, {Jeong Shik}",

note = "Funding Information: This work was supported and funded by Korea Energy Management Corporation and partly by the KOSEF-JSPS Core University Program Japan and Korea.",

year = "2007",

doi = "10.1016/j.jeurceramsoc.2007.02.002",

language = "English",

volume = "27",

pages = "3629--3632",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier B.V.",

number = "13-15",

}

TY - JOUR

T1 - Improvement of translucency in Al2O3 ceramics by two-step sintering technique

AU - Kim, Dong Suk

AU - Lee, Jong Heun

AU - Sung, Rak Joo

AU - Kim, Sang Woo

AU - Kim, Hyung Soo

AU - Park, Jeong Shik

N1 - Funding Information: This work was supported and funded by Korea Energy Management Corporation and partly by the KOSEF-JSPS Core University Program Japan and Korea.

PY - 2007

Y1 - 2007

N2 - Pure, 140, 500, and 2500 ppm MgO-doped Al2O3 specimens were sintered at 1700 °C in a vacuum with and without pre-sintering heat treatment (HT) at 800 °C for 50 h in air. Pre-sintering HT improved the transmittance in the visible (400-700 nm) range significantly. This enhanced transmittance was explained in terms of the removal of residual pores and the homogenization of the microstructure due to the lowering of the boundary mobility as a result of the MgO addition and the suppression of local densification through a pre-coarsening step.

AB - Pure, 140, 500, and 2500 ppm MgO-doped Al2O3 specimens were sintered at 1700 °C in a vacuum with and without pre-sintering heat treatment (HT) at 800 °C for 50 h in air. Pre-sintering HT improved the transmittance in the visible (400-700 nm) range significantly. This enhanced transmittance was explained in terms of the removal of residual pores and the homogenization of the microstructure due to the lowering of the boundary mobility as a result of the MgO addition and the suppression of local densification through a pre-coarsening step.

KW - AlO

KW - Lamp envelopes

KW - Optical properties

KW - Sintering

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DO - 10.1016/j.jeurceramsoc.2007.02.002

M3 - Article

AN - SCOPUS:34347372287

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VL - 27

SP - 3629

EP - 3632

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 13-15

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