Refinement mechanism of CeO2 addition on Y2BaCuO5 particles in PMP YBCO bulks

S. K. Chen; L. Zhou; K. G. Wang; X. Z. Wu; P. X. Zhang; Y. Feng

doi:10.1016/S0921-4534(01)00915-7

Refinement mechanism of CeO₂ addition on Y₂BaCuO₅ particles in PMP YBCO bulks

S. K. Chen, L. Zhou, K. G. Wang, X. Z. Wu, P. X. Zhang, Y. Feng

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

21 Scopus citations

Abstract

YBCO bulk samples with a nominal composition of YBa₂Cu₃O_6+x+15 wt.% Y₂BaCuO₅+0.5 wt.% CeO₂ have been prepared by the powder melting process technique and the microstructure has been investigated by using scanning electron microscopy and transmission electron microscopy. An obvious refinement effect resulting in Y₂BaCuO₅ particles with a mean diameter about 500 nm in textured YBCO bulks has been achieved by CeO₂ addition. About one-fourth of the Y₂BaCuO₅ particles were observed to contain at least one nanometric core which was proved to be Y₂O₃ by selected area diffraction. In addition, a BaCeO₃ phase with a square shape was found. Our experimental results provide further evidence for the heterogeneous nucleation mechanism of Y₂BaCuO₅ particles on Y₂O₃ previously generated through a reaction between CeO₂ and precursors, which was first proposed by Piñol et al. for the melt texture growth process.

Original language	English
Pages (from-to)	190-194
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	366
Issue number	3
DOIs	https://doi.org/10.1016/S0921-4534(01)00915-7
State	Published - 15 Jan 2002
Externally published	Yes

Keywords

CeO addition
Powder melting process
Refinement mechanism
Submicron YBaCuO
YBCO

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10.1016/S0921-4534(01)00915-7

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title = "Refinement mechanism of CeO2 addition on Y2BaCuO5 particles in PMP YBCO bulks",

abstract = "YBCO bulk samples with a nominal composition of YBa2Cu3O6+x+15 wt.% Y2BaCuO5+0.5 wt.% CeO2 have been prepared by the powder melting process technique and the microstructure has been investigated by using scanning electron microscopy and transmission electron microscopy. An obvious refinement effect resulting in Y2BaCuO5 particles with a mean diameter about 500 nm in textured YBCO bulks has been achieved by CeO2 addition. About one-fourth of the Y2BaCuO5 particles were observed to contain at least one nanometric core which was proved to be Y2O3 by selected area diffraction. In addition, a BaCeO3 phase with a square shape was found. Our experimental results provide further evidence for the heterogeneous nucleation mechanism of Y2BaCuO5 particles on Y2O3 previously generated through a reaction between CeO2 and precursors, which was first proposed by Pi{\~n}ol et al. for the melt texture growth process.",

keywords = "CeO addition, Powder melting process, Refinement mechanism, Submicron YBaCuO, YBCO",

author = "Chen, {S. K.} and L. Zhou and Wang, {K. G.} and Wu, {X. Z.} and Zhang, {P. X.} and Y. Feng",

year = "2002",

month = jan,

day = "15",

doi = "10.1016/S0921-4534(01)00915-7",

language = "英语",

volume = "366",

pages = "190--194",

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

issn = "0921-4534",

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TY - JOUR

T1 - Refinement mechanism of CeO2 addition on Y2BaCuO5 particles in PMP YBCO bulks

AU - Chen, S. K.

AU - Zhou, L.

AU - Wang, K. G.

AU - Wu, X. Z.

AU - Zhang, P. X.

AU - Feng, Y.

PY - 2002/1/15

Y1 - 2002/1/15

N2 - YBCO bulk samples with a nominal composition of YBa2Cu3O6+x+15 wt.% Y2BaCuO5+0.5 wt.% CeO2 have been prepared by the powder melting process technique and the microstructure has been investigated by using scanning electron microscopy and transmission electron microscopy. An obvious refinement effect resulting in Y2BaCuO5 particles with a mean diameter about 500 nm in textured YBCO bulks has been achieved by CeO2 addition. About one-fourth of the Y2BaCuO5 particles were observed to contain at least one nanometric core which was proved to be Y2O3 by selected area diffraction. In addition, a BaCeO3 phase with a square shape was found. Our experimental results provide further evidence for the heterogeneous nucleation mechanism of Y2BaCuO5 particles on Y2O3 previously generated through a reaction between CeO2 and precursors, which was first proposed by Piñol et al. for the melt texture growth process.

AB - YBCO bulk samples with a nominal composition of YBa2Cu3O6+x+15 wt.% Y2BaCuO5+0.5 wt.% CeO2 have been prepared by the powder melting process technique and the microstructure has been investigated by using scanning electron microscopy and transmission electron microscopy. An obvious refinement effect resulting in Y2BaCuO5 particles with a mean diameter about 500 nm in textured YBCO bulks has been achieved by CeO2 addition. About one-fourth of the Y2BaCuO5 particles were observed to contain at least one nanometric core which was proved to be Y2O3 by selected area diffraction. In addition, a BaCeO3 phase with a square shape was found. Our experimental results provide further evidence for the heterogeneous nucleation mechanism of Y2BaCuO5 particles on Y2O3 previously generated through a reaction between CeO2 and precursors, which was first proposed by Piñol et al. for the melt texture growth process.

KW - CeO addition

KW - Powder melting process

KW - Refinement mechanism

KW - Submicron YBaCuO

KW - YBCO

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U2 - 10.1016/S0921-4534(01)00915-7

DO - 10.1016/S0921-4534(01)00915-7

M3 - 文章

AN - SCOPUS:0037079758

SN - 0921-4534

VL - 366

SP - 190

EP - 194

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 3

ER -

Refinement mechanism of CeO₂ addition on Y₂BaCuO₅ particles in PMP YBCO bulks

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Keywords

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