Melts of the target composition Bi2Sr2Ca2Cu3O10 were produced and quen
ched in a specially designed twin-roller device. Quenching rates were
estimated to be between about 0.2 . 10(6) and 2 . 10(6) K . s-1. In al
l quenching experiments mainly three sample shapes resulted, thin sliv
ers, fibers, and clusters ot sticking droplets. Slivers and fibers pro
ved to be glassy, whereas the bulk of the clusters was crystalline. Th
e slivers showed surface features due to nonuniform solidification pro
cesses. Thus wavy regions could be found or the surfaces were layered
because of a rupturing during quenching. It could further be shown tha
t an Al2O3 content of the melts does have some influence on the glass
formation.