A study of the effect of KClO3 addition on the AC susceptibility and micro structure of high-temperature (Tconset at 105 K) YBCO ceramic superconductors

A. Veneva, I. Iordanov, L. Toshev, A. Stoyanova-Ivanova, D. Gogova

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Bulk Y1Ba2Cu3Oy superconductors with KClO3 or K2CO3 additives were synthesized by a solid state reaction method. The influence of additives on the AC susceptibility, morphology and microstructure of samples with nominal compositions Y1Ba2-xKxCu3Oy, Y1Ba2Cu3.5-xKxOy, Y1-0.2xBa2-0.2xKxCu3Oy, (x=0.2) were investigated. Experimental results showed a promoting effect of the additives on the formation of 123 phase in air atmosphere. Only traces of potassium were observed in all samples after the final backing, but chlorine was remained in the material. The superconducting transition temperature for all KClO3-doped samples was found to be higher than that for K2CO3-doped and undoped Y1Ba2Cu3Oy (YBCO). KClO3-doped Y1Ba1.8K0.2Cu3Oy with Tconset at 105 K was obtained. The comparison of characteristics for samples with various potassium compound in the initial batch demonstrated that each additive had a specific effect on X(T), ΔTC and microstructure of YBCO high-temperature superconductors (HTSC). The results were discussed in terms of different interaction in which KClO3 and K2CO3 participate up to 900°C.

Original languageEnglish
Pages (from-to)175-184
Number of pages10
JournalPhysica C: Superconductivity and its applications
Volume308
Issue number3-4
DOIs
Publication statusPublished - 1998 Nov 20
Externally publishedYes

Fingerprint

Ceramic superconductors
alternating current
ceramics
magnetic permeability
microstructure
Microstructure
Potassium Compounds
Potassium compounds
potassium compounds
Temperature
High temperature superconductors
backups
Chlorine
Solid state reactions
high temperature superconductors
Superconducting materials
Superconducting transition temperature
chlorine
Potassium
potassium

Keywords

  • AC susceptibility YBCO
  • KCO-doped YBCO
  • KClO-doped YBCO
  • Microstructure
  • YBCO ceramic preparation

ASJC Scopus subject areas

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

Cite this

A study of the effect of KClO3 addition on the AC susceptibility and micro structure of high-temperature (Tconset at 105 K) YBCO ceramic superconductors. / Veneva, A.; Iordanov, I.; Toshev, L.; Stoyanova-Ivanova, A.; Gogova, D.

In: Physica C: Superconductivity and its applications, Vol. 308, No. 3-4, 20.11.1998, p. 175-184.

Research output: Contribution to journalArticle

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AU - Gogova, D.

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