Malaysian
Journal of Analytical Sciences Vol 22 No 3 (2018): 441 - 445
DOI:
10.17576/mjas-2018-2203-09
SUPERCONDUCTING PROPERTIES OF Y2Ba5Cu8Oδ
(Y258) POROUS AND NON-POROUS STRUCTURE
(Sifat Superkonduktor Y2Ba5Cu8Oδ
(Y258) Struktur Berliang dan Tidak Berliang)
Suazlina Mat Ali1, Syamsyir Akmal Senawi2, Azhan
Hashim2*, Azman Kasim2, Wan Aizuddin Wan Razali2,
Hartini Ahmad Rafaie2, Norihan Yahya2
1Faculty of Applied Sciences,
Universiti Teknologi MARA Shah Alam, 40450 Shah Alam,
Selangor, Malaysia
2Faculty of Applied Sciences,
Universiti Teknologi MARA Pahang, 26400 Bandar Jengka,
Pahang, Malaysia
*Corresponding author: dazhan@pahang.uitm.edu.my
Received: 4
December 2016; Accepted: 1 December 2017
Abstract
Solid state reaction method was applied to produce porous and non-porous
ceramic materials through a series of heating and grinding. This study revealed
the distinguish properties of Y258 in terms of their porous and non-porous
structure. The bulk material usually loses its high temperature features due to
increase in critical current density. Therefore, it is essential to investigate
the porous structure that influences the superconducting properties. The
electrical properties of superconductor due to critical temperature, Tc and critical current
density, Jc were
determined using Resistivity Measurement System (RMS). The morphological
structure of superconductor material was analysed by using Scanning Electron
Microscopy (SEM). The grain boundary of porous structure is significant to
induce higher conductivity without detriment the critical temperature of the
superconductor. The higher Jc
recorded for porous Y258 was 1.59 A/cm2 at 50 K. The Jc value was higher compared
to non-porous optimal structure which is 1.42 A/cm2. The Tc zero for porous and
non-porous sample gives the same value which is 78 K for both samples. Results
of Y247 doped with Ca were determined for comparison.
Keywords: porous, non-porous, critical temperature,
current density, morphology
Abstrak
Kaedah
tindak balas keadaan pepejal telah diaplikasikan bagi menghasilkan seramik
berliang dan tidak berliang melalui siri-siri pembakaran dan kisaran. Kajian
yang telah dilakukan adalah berkisar kepada perbandingan sifat superkonduktor Y258 berliang dan tidak
berliang. Bahan pukal kebiasaannya hilang bersifat suhu tinggi disebabkan
peningkatan dalam ketumpatan arus. Oleh yang demikian, adalah satu keperluan
bagi mengkaji sifat struktur berliang dalam mempengaruhi sesuatu sifat
superkonduktor. Sifat elektrik superkonduktor melalui suhu genting dan
ketumpatan arus genting adalah ditentukan menggunakan Sistem Pengukuran
Rintangan (RMS). Struktur permukaan superkonduktor dianalisis melalui Mikroskop
Imbasan Elektron (SEM). Sempadan butiran bagi struktur berliang adalah penting
bagi mempengaruhi kekonduksian yang lebih tinggi tanpa menjejaskan nilai suhu genting
superkonduktor. Dapatan tertinggi Jc
melibatkan Y258 berliang adalah 1.59 A/cm2 pada suhu 50 K. Nilai Jc adalah tinggi dibandingkan
dengan struktur optimum tidak berliang sekitar 1.42 A/cm2. Tc sifar bagi sampel berliang
dan tidak berliang memberikan nilai suhu yang setara pada 78 K melibatkan
kedua-dua sampel. Dapatan Y247 yang di dopkan Ca turut dijadikan sebagai rujukan
serta perbandingan bagi teras kajian yang dilakukan.
Kata kunci: berliang, tidak berliang, suhu genting,
ketumpatan arus, morfologi
References
1. Petrov, M. I., Tetyeva,
T. N., Kveglis, L. I., Efremov, A. A., Zeer, G. M., Balaev, D. A., Shaikhutdinov,
K. A., Popkov S. I. and Ovchinnikov. S. G. (2005). The synthesis,
microstructure, transport and magnetic properties of Bi-based low density HTSC.
Journal of Materials Processing
Technology, 161: 58–61.
2. Terent’ev, K. Yu., Gokhfel’d,
D. M., Popkov, S. I., Shaikhutdinov K. A. and Petrov, M. I. (2011). Pinning in
a porous high-temperature superconductor Bi-2223. Physics of the Solid State, 53(12): 2409–2414.
3. Studart, A. R.,
Gonzenbach, Urs T., Tervoort, E. and Gauckler, L. J. (2006). Processing routes
to macroporous ceramics: A review. Journal
of the American Ceramic Society, 89(6): 1771–1789.
4. Gokhfeld, D. M., Balaev,
D. A., Popkov, S. I., Shaykhutdinov, K. A. and Petrov, M. I. (2006).
Magnetization loop and critical current of porous Bi-based HTSC. Physica C, 434: 135-137.
5. Schwartz, R. W., Noudem,
J. G. and Reddy, E. S. (2006). Single grain YBa2Cu3Oy,
porous ceramic superconductors. Electroceramic
Materials and Applications: Ceramic Transactions Series, 196: 33–43.
6. Fiertek, P. and
Sadowski, W. (2006). Processing of porous structures of YBa2Cu3O7–δ
high-temperature superconductor. Materials
Science, 24: 1103-1108.
7. Norazidah, A. W., Azhan,
H., Azman, K., Hidayah, H. N. and Hawa, J. S. (2014). Effect of heat treatment
on Ca substitution in a porous Y(Ba1-xCax)2Cu3O7-δ
superconductor. Advanced Materials
Research, 895: 71–74.
8. Shlyk, L., Krabbes, G., Fuchs,
G. and Nenkov, K. (2002). Melt-processed YBCO doped with Ca and Cd: Comparison
of superconducting properties. Physica C,
383: 175-182.
9. Norazidah, A. W., Azhan,
H., Azman, K., Hidayah, H. N. and Hawa, J. S. (2012). Superconducting properties of calcium
substitution in barium site of porous YBa2Cu3O7 ceramics.
Advanced Materials Research, 501:
294–298.
10. Noel A. R., John, H. D.,
Sibe, H. M., Mark, G. B. and Judith, L. M. (2005). Transport properties of Ca-doped
YBCO coated conductors. IEEE Transactions
on Applied Superconductivity, 15: 2570-2573.
11. Roaa F. A. and Emad
K. A. (2015). New high temperature superconductor phase of Y-Ba-Cu-O system. International Journal of Advanced Research
in Physical Science, 2 (7): 33-39.
12. Pimentel Jr, J. L., Martinez Buitrago, D., Supelano, I., Parra Vargas, C. A., Mesquita, F. R. and Pureur,
P. (2015).
Synthesis and characterization of the superconductors Y3Ba5Cu8−x FexO18(0.0597
≤ x ≤ 0.1255). Journal
of Superconductivity and Novel Magnetism, 28: 509–512.
13. Khalida, S.. Fariesha,
F.. Azhan, H. and Yusainee, S. Y. (2013). Influence of heat treatments on
electrical properties and microstructure of 10% mass fraction of sucrose YBCO
superconductor. Malaysian Journal of
Analytical Sciences, 17(1): 1 – 10.
14. Shalaby, M.
S., Hashem, H. M., Hammad, T. R., Wahab, L. A., Marzouk, K.
H. and Soltan, S. (2016). Higher critical
current density achieved in Bi-2223 High-TC superconductors. Journal of Radiation Research and Applied
Sciences, 9: 345–351.