000			03522ntm a2200361 i 4500
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008			220412s2021 my a|||frm||| 000 0 eng d
020			_aTHE0009202(Local) _qhardback
040			_aUMP _beng _cUMP _erda
090			_aFIST .B79 2021 r Thesis
100	1		_aBryan Andrew Balasan, _eauthor.
245	1	0	_aComparative study of bi-2223 synthesised via electrospinning and coprecipitation methods / _cBryan Andrew Balasan
264		1	_aKuantan, Pahang : _bUMP, _c2021
264		4	_c© 2021
300			_axii, 90 pages : _billustrations ; _c30 cm. + _e1 CD-ROM
336			_atext _2rdacontent
336			_atext _2rdacontent
337			_aunmediated _2rdamedia
337			_acomputer _2rdamedia
338			_avolume _2rdacarrier
338			_acomputer disc _2rdacarrier
347			_atext file _bPDF _2rda
500			_aFaculty of Industrial Sciences and Technology
502			_aThesis (Master of Science ) -- Universiti Malaysia Pahang – 2021
504			_aIncludes bibliographical references
520	3		_aCeramic superconducting materials could enhance the efficiency of electronics, however, there are issues such as low current density and the requirements of cooling this material to achieve Meissner effect which hinders superconductivity. This can be rectified either with addition or substitutes of foreign rare earth elements to the material to modify their properties. The objective of the research was to synthesise bismuth-based superconductor Bi2Sr2Ca2Cu3O10 (Bi-2223) via electrospinning, characterisation of thermal, structural and electrical transport properties of samples, and lastly to study the effect of Pb addition unto precursors of samples. For this research, electrospinning has downsized the grains of samples, and samples prepared via coprecipitation was compared with the electrospun samples to investigate their critical temperature, activation energy and current density. The electrospun samples were expected to exhibit grain morphology advantage over coprecipitation prepared samples to enhance the problem of low current density present in superconductors stemming from weak intergrain links of grain boundaries. The samples were characterised via the naked eye, thermal analysis, electron imaging, crystallography analysis, four-point probe method and magnetic susceptibility. The electrospun samples (ES) investigated via electron imaging for pellet form had abundancy of low angled grain boundaries when compared with coprecipitation prepared samples (COP). Critical temperatures of P-COP-2223, P-ESPb-2223 and P-ES-2223 achieved at 98 K, 80 K and 68 K respectively. This was due to volume fraction of Bi-2223 phase in the electrospun samples being lower than of coprecipitated samples. The current density measurement for P-COP-2223 led with 4928 A/cm2, then P-ESPb-2223 with 1852 A/cm 2 whereas P-ES-2223 not obtainable due to low angled grain boundaries and the instrument’s low sensitivity. This research contributes to the effect of grain boundaries by synthesising a denser grain boundary at the expense of weaker pinning centres which proves the capability of synthesising Bi-2223 with electrospinning method.
610	2	0	_aFaculty of Industrial Sciences and Technology _xDissertations
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses
942			_2lcc _cTHESIS