Hot-Extrusion of Bi-Superconductiong Ceramic Powder

Preparation of Long Specimen

Abstract

Bi₂Sr₂CaCu₂O_x ceramic powder prepared by a solid-state reaction was encapsulated in Cu can with a dimension of 33_φ(O.D.) - 20_φ(I.D.) ?? 65lmm. The bullet (can containing ceramic powder) was preheated at 840°C for about 10 min, and was extruded rapidly to prepare a long specimen with the length of about 500 mm. An outline design of the containner for the hot-extrusion, and some experimental results were reported in this note.