SYNTHESIS AND PROPERTIES OF TL0.6V0.5SR2CA2CU3OX

Powder of approximate composition Tl0.6V0.5Sr2Ca2Cu3O(x) was synthesiz ed in O2 at 970-degrees-C from a mixture of oxides of nominal composit ion Tl2V0.5Sr2Ca2Cu3O(x). The onset T(c) was 110 K. Magnetic hysteresi s measurements indicated that above almost-equal-to 60 K the irreversi bility behavior was superior to that of TlBa2Ca2Cu3O(x), which has a T (c) of almost-equal-to 118 K. The individual grains were up to almost- equal-to 50 mum in length, with aspect ratios < 10, which may during f abrication promote texturing by mechanical means.