High-resolution transmission electron microscopic observation of highly dense MgB2 superconductors

Gun Yong Sung; Sang Hyeob Kim; Jun Ho Kim; Dong Chul Yoo; Ju Wook Lee; Jeong Yong Lee; C. U. Jung; Min Seok Park; W. N. Kang; Zhonglian Du; Sung Ik Lee

doi:10.1088/0953-2048/14/10/312

High-resolution transmission electron microscopic observation of highly dense MgB₂ superconductors

Gun Yong Sung, Sang Hyeob Kim, Jun Ho Kim, Dong Chul Yoo, Ju Wook Lee, Jeong Yong Lee, C. U. Jung, Min Seok Park, W. N. Kang, Zhonglian Du, Sung Ik Lee

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

11 Scopus citations

Abstract

The microstructure of an MgB₂ superconductor sintered at high temperature under a high pressure of ∼3 GPa was investigated by using high-resolution transmission electron microscopy (HRTEM). The transmission electron micrographs did not show any pores in the specimen. All grains were compactly connected, and no discernible empty spaces or impurities at the boundaries existed over the regions investigated. The HRTEM image showed clearly each constituent atom that formed the basal hexagonal plane. The density measured by Archimedes' method almost corresponded to the theoretical value of the bulk sample. Our transmission electron micrographs support the view that the MgB₂ powder was sintered under high temperature and high pressure into its theoretical density without any porosity or grain growth.

Original language	English
Pages (from-to)	880-883
Number of pages	4
Journal	Superconductor Science and Technology
Volume	14
Issue number	10
DOIs	https://doi.org/10.1088/0953-2048/14/10/312
State	Published - Oct 2001
Externally published	Yes

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title = "High-resolution transmission electron microscopic observation of highly dense MgB2 superconductors",

abstract = "The microstructure of an MgB2 superconductor sintered at high temperature under a high pressure of ∼3 GPa was investigated by using high-resolution transmission electron microscopy (HRTEM). The transmission electron micrographs did not show any pores in the specimen. All grains were compactly connected, and no discernible empty spaces or impurities at the boundaries existed over the regions investigated. The HRTEM image showed clearly each constituent atom that formed the basal hexagonal plane. The density measured by Archimedes' method almost corresponded to the theoretical value of the bulk sample. Our transmission electron micrographs support the view that the MgB2 powder was sintered under high temperature and high pressure into its theoretical density without any porosity or grain growth.",

author = "Sung, \{Gun Yong\} and Kim, \{Sang Hyeob\} and Kim, \{Jun Ho\} and Yoo, \{Dong Chul\} and Lee, \{Ju Wook\} and Lee, \{Jeong Yong\} and Jung, \{C. U.\} and Park, \{Min Seok\} and Kang, \{W. N.\} and Zhonglian Du and Lee, \{Sung Ik\}",

year = "2001",

month = oct,

doi = "10.1088/0953-2048/14/10/312",

language = "English",

volume = "14",

pages = "880--883",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

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T1 - High-resolution transmission electron microscopic observation of highly dense MgB2 superconductors

AU - Sung, Gun Yong

AU - Kim, Sang Hyeob

AU - Kim, Jun Ho

AU - Yoo, Dong Chul

AU - Lee, Ju Wook

AU - Lee, Jeong Yong

AU - Jung, C. U.

AU - Park, Min Seok

AU - Kang, W. N.

AU - Du, Zhonglian

AU - Lee, Sung Ik

PY - 2001/10

Y1 - 2001/10

N2 - The microstructure of an MgB2 superconductor sintered at high temperature under a high pressure of ∼3 GPa was investigated by using high-resolution transmission electron microscopy (HRTEM). The transmission electron micrographs did not show any pores in the specimen. All grains were compactly connected, and no discernible empty spaces or impurities at the boundaries existed over the regions investigated. The HRTEM image showed clearly each constituent atom that formed the basal hexagonal plane. The density measured by Archimedes' method almost corresponded to the theoretical value of the bulk sample. Our transmission electron micrographs support the view that the MgB2 powder was sintered under high temperature and high pressure into its theoretical density without any porosity or grain growth.

AB - The microstructure of an MgB2 superconductor sintered at high temperature under a high pressure of ∼3 GPa was investigated by using high-resolution transmission electron microscopy (HRTEM). The transmission electron micrographs did not show any pores in the specimen. All grains were compactly connected, and no discernible empty spaces or impurities at the boundaries existed over the regions investigated. The HRTEM image showed clearly each constituent atom that formed the basal hexagonal plane. The density measured by Archimedes' method almost corresponded to the theoretical value of the bulk sample. Our transmission electron micrographs support the view that the MgB2 powder was sintered under high temperature and high pressure into its theoretical density without any porosity or grain growth.

UR - https://www.scopus.com/pages/publications/0035472091

U2 - 10.1088/0953-2048/14/10/312

DO - 10.1088/0953-2048/14/10/312

M3 - Article

AN - SCOPUS:0035472091

SN - 0953-2048

VL - 14

SP - 880

EP - 883

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 10

ER -

High-resolution transmission electron microscopic observation of highly dense MgB₂ superconductors

Abstract

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