Synthesis of Hg-based superconductors by hot-isostatic pressing

G. C. Celotti; A. Tampieri; C. Micheletti; D. Dalle Fabbriche

Synthesis of Hg-based superconductors by hot-isostatic pressing

G. C. Celotti, A. Tampieri, C. Micheletti, D. Dalle Fabbriche

Houston Methodist

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

Abstract

The preparation of H(Pb)BCCO (1201) and (1223) phases was performed by hot-isostatic-pressing (HIP) using simple oxides as precursors canned in silver tube. In the case of Hg_0.8Pb_0.2Ba₂CuO_4+δ the preparation, carried out at 800°C and 0.15 GPa for 5 hrs, yielded a single phase bulk sample. On the other hand the preparation of Hg_0.8Pb_0.2Ba₂Ca₂Cu₃O _8+δ at 820°C and 0.15 GPa for 5 hrs allowed the attainment of a high volume fraction of 1223 phase. Megnetic susceptibility of 1201 phases showed a granular transition around 90 K; in the case of 1223 the value was around ≈ 128 K followed by a broadened intergranular transition. These results show the feasibility of 1201 preparation with high purity and in form of bulk samples and of 1223 synthesis in large quantities, almost impossible to obtain with conventional techniques.

Original language	English (US)
Pages (from-to)	1243-1246
Number of pages	4
Journal	Key Engineering Materials
Issue number	136 PART 2
State	Published - 1997

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Synthesis of Hg-based superconductors by hot-isostatic pressing",

abstract = "The preparation of H(Pb)BCCO (1201) and (1223) phases was performed by hot-isostatic-pressing (HIP) using simple oxides as precursors canned in silver tube. In the case of Hg0.8Pb0.2Ba2CuO4+δ the preparation, carried out at 800°C and 0.15 GPa for 5 hrs, yielded a single phase bulk sample. On the other hand the preparation of Hg0.8Pb0.2Ba2Ca2Cu3O 8+δ at 820°C and 0.15 GPa for 5 hrs allowed the attainment of a high volume fraction of 1223 phase. Megnetic susceptibility of 1201 phases showed a granular transition around 90 K; in the case of 1223 the value was around ≈ 128 K followed by a broadened intergranular transition. These results show the feasibility of 1201 preparation with high purity and in form of bulk samples and of 1223 synthesis in large quantities, almost impossible to obtain with conventional techniques.",

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T1 - Synthesis of Hg-based superconductors by hot-isostatic pressing

AU - Celotti, G. C.

AU - Tampieri, A.

AU - Micheletti, C.

AU - Dalle Fabbriche, D.

PY - 1997

Y1 - 1997

N2 - The preparation of H(Pb)BCCO (1201) and (1223) phases was performed by hot-isostatic-pressing (HIP) using simple oxides as precursors canned in silver tube. In the case of Hg0.8Pb0.2Ba2CuO4+δ the preparation, carried out at 800°C and 0.15 GPa for 5 hrs, yielded a single phase bulk sample. On the other hand the preparation of Hg0.8Pb0.2Ba2Ca2Cu3O 8+δ at 820°C and 0.15 GPa for 5 hrs allowed the attainment of a high volume fraction of 1223 phase. Megnetic susceptibility of 1201 phases showed a granular transition around 90 K; in the case of 1223 the value was around ≈ 128 K followed by a broadened intergranular transition. These results show the feasibility of 1201 preparation with high purity and in form of bulk samples and of 1223 synthesis in large quantities, almost impossible to obtain with conventional techniques.

AB - The preparation of H(Pb)BCCO (1201) and (1223) phases was performed by hot-isostatic-pressing (HIP) using simple oxides as precursors canned in silver tube. In the case of Hg0.8Pb0.2Ba2CuO4+δ the preparation, carried out at 800°C and 0.15 GPa for 5 hrs, yielded a single phase bulk sample. On the other hand the preparation of Hg0.8Pb0.2Ba2Ca2Cu3O 8+δ at 820°C and 0.15 GPa for 5 hrs allowed the attainment of a high volume fraction of 1223 phase. Megnetic susceptibility of 1201 phases showed a granular transition around 90 K; in the case of 1223 the value was around ≈ 128 K followed by a broadened intergranular transition. These results show the feasibility of 1201 preparation with high purity and in form of bulk samples and of 1223 synthesis in large quantities, almost impossible to obtain with conventional techniques.

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Synthesis of Hg-based superconductors by hot-isostatic pressing

Abstract

ASJC Scopus subject areas

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