Precursor effects on HgBa2Ca2Cu3O8 formation under high pressure

Q. M. Lin; Z. H. He; Y. Y. Sun; L. Gao; Y. Y. Xue; C. W. Chu

doi:10.1016/0921-4534(95)00588-9

Precursor effects on HgBa₂Ca₂Cu₃O₈ formation under high pressure

Q. M. Lin, Z. H. He, Y. Y. Sun, L. Gao, Y. Y. Xue, C. W. Chu

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Abstract

The effects of the precursor on the synthesis of HgBa₂Ca₂Cu₃O_8+δ(Hg-1233) under high pressure are studied. It was observed that HgCaO₂ and Hg-1212 appear in the early stage of the formation of Hg-1223. Through intercalation of BaCuO and CaCuO, HgCaO₂ and Hg-1212 can be converted to Hg-1223. We found that the mixing level of Ca- and Cu-ions strongly affects the formation of Hg-1223. The existence of large CaO grains in the precursor will increase the needed synthesis temperature or synthesis time, and impurities may appear. A precursor in which Ca-ions are well reacted with other ions facilities the formation of Hg-1223. We also found that this well-reacted precursor is insensitive to moist air.

Original language	English
Pages (from-to)	207-212
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	254
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(95)00588-9
Publication status	Published - 1995 Nov 20

All Science Journal Classification (ASJC) codes

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

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10.1016/0921-4534(95)00588-9

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title = "Precursor effects on HgBa2Ca2Cu3O8 formation under high pressure",

abstract = "The effects of the precursor on the synthesis of HgBa2Ca2Cu3O8+δ(Hg-1233) under high pressure are studied. It was observed that HgCaO2 and Hg-1212 appear in the early stage of the formation of Hg-1223. Through intercalation of BaCuO and CaCuO, HgCaO2 and Hg-1212 can be converted to Hg-1223. We found that the mixing level of Ca- and Cu-ions strongly affects the formation of Hg-1223. The existence of large CaO grains in the precursor will increase the needed synthesis temperature or synthesis time, and impurities may appear. A precursor in which Ca-ions are well reacted with other ions facilities the formation of Hg-1223. We also found that this well-reacted precursor is insensitive to moist air.",

author = "Lin, {Q. M.} and He, {Z. H.} and Sun, {Y. Y.} and L. Gao and Xue, {Y. Y.} and Chu, {C. W.}",

note = "Funding Information: The authorst hankY.K. Tao for help with DTA dataa ndR.L. Meng for usefuld iscussionT. his work is supportedin part by the NSF Grant No. DMR 91-22043U, SAFOSR Grant No: F49620-93-1-0310 by BMDO, EPRI, Texas Centerf or Superconductivity at the University of Houston, and the T.L.L. Temple Foundation.",

year = "1995",

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doi = "10.1016/0921-4534(95)00588-9",

language = "English",

volume = "254",

pages = "207--212",

journal = "Physica C: Superconductivity and its applications",

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TY - JOUR

T1 - Precursor effects on HgBa2Ca2Cu3O8 formation under high pressure

AU - Lin, Q. M.

AU - He, Z. H.

AU - Sun, Y. Y.

AU - Gao, L.

AU - Xue, Y. Y.

AU - Chu, C. W.

N1 - Funding Information: The authorst hankY.K. Tao for help with DTA dataa ndR.L. Meng for usefuld iscussionT. his work is supportedin part by the NSF Grant No. DMR 91-22043U, SAFOSR Grant No: F49620-93-1-0310 by BMDO, EPRI, Texas Centerf or Superconductivity at the University of Houston, and the T.L.L. Temple Foundation.

PY - 1995/11/20

Y1 - 1995/11/20

N2 - The effects of the precursor on the synthesis of HgBa2Ca2Cu3O8+δ(Hg-1233) under high pressure are studied. It was observed that HgCaO2 and Hg-1212 appear in the early stage of the formation of Hg-1223. Through intercalation of BaCuO and CaCuO, HgCaO2 and Hg-1212 can be converted to Hg-1223. We found that the mixing level of Ca- and Cu-ions strongly affects the formation of Hg-1223. The existence of large CaO grains in the precursor will increase the needed synthesis temperature or synthesis time, and impurities may appear. A precursor in which Ca-ions are well reacted with other ions facilities the formation of Hg-1223. We also found that this well-reacted precursor is insensitive to moist air.

AB - The effects of the precursor on the synthesis of HgBa2Ca2Cu3O8+δ(Hg-1233) under high pressure are studied. It was observed that HgCaO2 and Hg-1212 appear in the early stage of the formation of Hg-1223. Through intercalation of BaCuO and CaCuO, HgCaO2 and Hg-1212 can be converted to Hg-1223. We found that the mixing level of Ca- and Cu-ions strongly affects the formation of Hg-1223. The existence of large CaO grains in the precursor will increase the needed synthesis temperature or synthesis time, and impurities may appear. A precursor in which Ca-ions are well reacted with other ions facilities the formation of Hg-1223. We also found that this well-reacted precursor is insensitive to moist air.

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JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

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ER -

Precursor effects on HgBa₂Ca₂Cu₃O₈ formation under high pressure

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