Zy. Chen et al., SYNTHESIS AND CHARACTERIZATION OF 2234-PHASE TL2BA2CA3CU4O12 PREPAREDNEAR AND AT THE MELTING-POINT, Superconductor science and technology, 6(4), 1993, pp. 261-264
Bulk samples of nearly-pure 2234-phase Tl2Ba2Ca3Cu4O12 were synthesize
d near the melting point from starting compositions of either Tl2Ba2Ca
3.3Cu4Oz or Tl2Ba2Ca4Cu5Oz. Well crystallized 'clusters' of 2234-phase
Tl2Ba2Ca3Cu4O12 were also prepared by melting the starting material T
l2Ba2Ca4Cu5Oz. The 2234-phase samples prepared in the present experime
nt exhibit T(c)(rho = 0) up to 119 K.