Abstract
We have developed a low-cost, short time manufacturing process using a novel method, starting from a mixture of Er2BaO4, BaCuO2, and CuO, with an excess of Er at expense of Ba. Several micrometers thick films were prepared by the screen-printing technique, spreading the mixture paste on silver substrates, processed then in Ar-1% O2 atmosphere. Using a double-step annealing process, we obtained good quality Er-123 thick films on silver substrates, with Tc (onset) 92 K. Formation of large flat grains was observed by scanning electron microscope. According to XRD analysis, the films were preferentially c-axis oriented. The magnetic (induced), self-field Jc measured at 77 K was above 32 kA/cm2. We observed a strong dependence of the transport current, Ic, on the grain size. The maximum Ic at 77 K as high as 10 A was observed in the sample with the average grain size around 40 μm. The present results indicate that our technology, enabling preparation of large-area superconducting thick films on Ag-based substrates in short processing times, is relatively cheap and appropriate for utilization in long-length RE-123 silver sheath wire production for commercial applications.
| Original language | English |
|---|---|
| Pages (from-to) | 1345-1349 |
| Number of pages | 5 |
| Journal | Physica C: Superconductivity and its Applications |
| Volume | 468 |
| Issue number | 15-20 |
| DOIs | |
| Publication status | Published - 2008 Sep 15 |
| Externally published | Yes |
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Keywords
- Critical current density (J) and I
- ErBaO
- LRE-BaCuO
- SEM
- Thick films
- XRD
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
New method of synthesis and physical properties of thick superconducting Er-123 films. / Miryala, Muralidhar; Sakai, Naomichi; Machi, T.; Miyajiri, T.; Hirabayashi, I.; Tanaka, S.
In: Physica C: Superconductivity and its Applications, Vol. 468, No. 15-20, 15.09.2008, p. 1345-1349.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - New method of synthesis and physical properties of thick superconducting Er-123 films
AU - Miryala, Muralidhar
AU - Sakai, Naomichi
AU - Machi, T.
AU - Miyajiri, T.
AU - Hirabayashi, I.
AU - Tanaka, S.
PY - 2008/9/15
Y1 - 2008/9/15
N2 - We have developed a low-cost, short time manufacturing process using a novel method, starting from a mixture of Er2BaO4, BaCuO2, and CuO, with an excess of Er at expense of Ba. Several micrometers thick films were prepared by the screen-printing technique, spreading the mixture paste on silver substrates, processed then in Ar-1% O2 atmosphere. Using a double-step annealing process, we obtained good quality Er-123 thick films on silver substrates, with Tc (onset) 92 K. Formation of large flat grains was observed by scanning electron microscope. According to XRD analysis, the films were preferentially c-axis oriented. The magnetic (induced), self-field Jc measured at 77 K was above 32 kA/cm2. We observed a strong dependence of the transport current, Ic, on the grain size. The maximum Ic at 77 K as high as 10 A was observed in the sample with the average grain size around 40 μm. The present results indicate that our technology, enabling preparation of large-area superconducting thick films on Ag-based substrates in short processing times, is relatively cheap and appropriate for utilization in long-length RE-123 silver sheath wire production for commercial applications.
AB - We have developed a low-cost, short time manufacturing process using a novel method, starting from a mixture of Er2BaO4, BaCuO2, and CuO, with an excess of Er at expense of Ba. Several micrometers thick films were prepared by the screen-printing technique, spreading the mixture paste on silver substrates, processed then in Ar-1% O2 atmosphere. Using a double-step annealing process, we obtained good quality Er-123 thick films on silver substrates, with Tc (onset) 92 K. Formation of large flat grains was observed by scanning electron microscope. According to XRD analysis, the films were preferentially c-axis oriented. The magnetic (induced), self-field Jc measured at 77 K was above 32 kA/cm2. We observed a strong dependence of the transport current, Ic, on the grain size. The maximum Ic at 77 K as high as 10 A was observed in the sample with the average grain size around 40 μm. The present results indicate that our technology, enabling preparation of large-area superconducting thick films on Ag-based substrates in short processing times, is relatively cheap and appropriate for utilization in long-length RE-123 silver sheath wire production for commercial applications.
KW - Critical current density (J) and I
KW - ErBaO
KW - LRE-BaCuO
KW - SEM
KW - Thick films
KW - XRD
UR - http://www.scopus.com/inward/record.url?scp=50349083115&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50349083115&partnerID=8YFLogxK
U2 - 10.1016/j.physc.2008.05.055
DO - 10.1016/j.physc.2008.05.055
M3 - Article
VL - 468
SP - 1345
EP - 1349
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 15-20
ER -