The Malaysian Journal of Analytical Sciences Vol 17
No 1 (2013): 1 – 10
INFLUENCE OF HEAT TREATMENTS ON ELECTRICAL
PROPERTIES AND MICROSTRUCTURE OF 10% MASS FRACTION OF SUCROSE YBCO SUPERCONDUCTOR
(Kesan Rawatan Haba Ke Atas Sifat-Sifat Elektrik dan
Mikrostruktur 10% Pecahan Jisim Sukrosa YBCO Superkonduktur)
S.Khalida1*,
F.Fariesha2, H.Azhan3 and S.Y.Yusainee4
1International Education College (INTEC),
UiTM Seksyen 17, 40200 Shah Alam, Selangor, Malaysia
2Faculty of Applied Sciences,
Universiti Teknologi MARA Perak,, Kampus Tapah,
35400Tapah Road, Perak, Malaysia
3Universiti Teknologi MARA Pahang, 26400 Bandar
Jengka, Pahang, Malaysia
4Faculty of Applied Sciences,
Universiti Teknologi MARA,40450 Shah Alam, Selangor,
Malaysia
*Corresponding author: khalidasalleh@salam.uitm.edu.my
Abstract
The influence of different heat
treatments on the superconducting properties of 10% mass fraction of sucrose
structure YBCO superconductor was investigated. X-Ray Diffraction (XRD) and
Scanning Electron Microscopy (SEM) equipments were used to determine the phase
of superconductor and structural studies respectively at10% mass fraction of
sucrose. The samples were prepared via solid state (SSM) and co-precipitation
(CPM) reaction methods and underwent sintering and heat treatment process at
900°C, 930°C and 960°C respectively with mixing of C12H22O11
sucrose during pelletization. The TC,on decreases with respect to
higher heat treatment temperature. The suppression of both TC,on and
TC,off indicates the destruction of superconductivity trends. The
best TC,off were achieved in pure SSM and CPM samples sintered at
950°C for 5 hours with TC,off 86K and 91K respectively. Comparing
with pure YBCO, the 10% mass fraction of sucrose YBCO exhibited higher critical
current, IC by two times. It indicates the effect of high surface
area in porous structure. The XRD results confirmed that all the samples remain
in single phase, which indicates no effect of sucrose in the porous structures
sample and maintaining in orthorhombic structure. Higher heat treatment at
960°C resulted in destruction on its superconductivity behavior due to the
partial melt phase on its microstructure, especially in CPM. This is due to the
smaller grain size of samples which trapped more heat and causing partial
melting to occur rapidly. It can be deduced that, annealing temperatures at
900°C and 930°C are the best optimum heat treatments for CPM and SSM porous
superconductor, respectively.
Keywords: YBCO superconductor, porous superconductor, sucrose
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