Encapsulation method for the synthesis of nearly single-phase superconducting HgBa2Ca2Cu3O8+δ with Tc≥ 135 K

Kazuyuki Isawa; Ayako Tokiwa-Yamamoto; Makoto Itoh; Seiji Adachi; H. Yamauchi

doi:10.1016/0921-4534(94)90111-2

Encapsulation method for the synthesis of nearly single-phase superconducting HgBa₂Ca₂Cu₃O_8+δ with T_c≥ 135 K

Kazuyuki Isawa, Ayako Tokiwa-Yamamoto, Makoto Itoh, Seiji Adachi, H. Yamauchi

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

71 Citations (Scopus)

Abstract

Nearly single-phase polycrystalline samples of HgBa₂Ca₂Cu₃O_8+δ were successfully synthesized under relatively simple and unprecedented synthesis conditions, i.e. at a "low" temperature (<700°C) and for a "long" period of time (5-168h), using mono-oxide powders of Hg, Ba, Ca, and Cu as starting materials. A pressed powder mixture was heated at 665°C for ≈75 h in an evacuated fused quartz tube, and then post-annealed in flowing O₂ gas to exhibit a Meissner signal below 135.4 K. Zero resistance of this sample was observed at 133.9 K.

Original language	English
Pages (from-to)	33-37
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	222
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90111-2
Publication status	Published - 1994 Mar 10
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Encapsulation method for the synthesis of nearly single-phase superconducting HgBa2Ca2Cu3O8+δ with Tc≥ 135 K",

abstract = "Nearly single-phase polycrystalline samples of HgBa2Ca2Cu3O8+δ were successfully synthesized under relatively simple and unprecedented synthesis conditions, i.e. at a {"}low{"} temperature (<700°C) and for a {"}long{"} period of time (5-168h), using mono-oxide powders of Hg, Ba, Ca, and Cu as starting materials. A pressed powder mixture was heated at 665°C for ≈75 h in an evacuated fused quartz tube, and then post-annealed in flowing O2 gas to exhibit a Meissner signal below 135.4 K. Zero resistance of this sample was observed at 133.9 K.",

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T1 - Encapsulation method for the synthesis of nearly single-phase superconducting HgBa2Ca2Cu3O8+δ with Tc≥ 135 K

AU - Isawa, Kazuyuki

AU - Tokiwa-Yamamoto, Ayako

AU - Itoh, Makoto

AU - Adachi, Seiji

AU - Yamauchi, H.

PY - 1994/3/10

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AB - Nearly single-phase polycrystalline samples of HgBa2Ca2Cu3O8+δ were successfully synthesized under relatively simple and unprecedented synthesis conditions, i.e. at a "low" temperature (<700°C) and for a "long" period of time (5-168h), using mono-oxide powders of Hg, Ba, Ca, and Cu as starting materials. A pressed powder mixture was heated at 665°C for ≈75 h in an evacuated fused quartz tube, and then post-annealed in flowing O2 gas to exhibit a Meissner signal below 135.4 K. Zero resistance of this sample was observed at 133.9 K.

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