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 language | English |
|---|---|
| Pages (from-to) | 175-184 |
| Number of pages | 10 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 308 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 1998 Nov 20 |
| Externally published | Yes |
Fingerprint
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 journal › Article
}
TY - JOUR
T1 - 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
AU - Veneva, A.
AU - Iordanov, I.
AU - Toshev, L.
AU - Stoyanova-Ivanova, A.
AU - Gogova, D.
PY - 1998/11/20
Y1 - 1998/11/20
N2 - 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.
AB - 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.
KW - AC susceptibility YBCO
KW - KCO-doped YBCO
KW - KClO-doped YBCO
KW - Microstructure
KW - YBCO ceramic preparation
UR - http://www.scopus.com/inward/record.url?scp=0032205647&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032205647&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(98)00344-X
DO - 10.1016/S0921-4534(98)00344-X
M3 - Article
AN - SCOPUS:0032205647
VL - 308
SP - 175
EP - 184
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3-4
ER -