Study on the Synthesis of Batches of the System Y-Ba-Cu-O Using Sol-Gel Method
2014 ◽
Vol 91
◽
pp. 19-23
Keyword(s):
Sol Gel
◽
The study presented deal with preparation of batches of the system Y-Ba-Cu-O using sol-gel method and citric acid as precursor. Batches with particle size of 100 nm containing each of the phases Y123 and Y211 were prepared. The stoichiometric amounts of Y, Ba and Cu oxides were dissolved in 65% HNO3 until clear blue solution was observed under heating to 80 ̊С. The nitrate solutions obtained were neutralized to pH = 6 with 25% solution of NH3 (p.a.), then С6Н8О7 was added as the gels obtained were thermally treated. The transformation processes taking place under change of temperature were studied by IR, XRD, DTA and SEM.
Ethylene glycol-citric acid-silica hybrid organic-inorganic materials obtained by the sol-gel method
1997 ◽
Vol 8
(1-3)
◽
pp. 535-539
◽
Keyword(s):
Sol Gel
◽