Indexed on: 01 Nov '94Published on: 01 Nov '94Published in: Journal of Electronic Materials
Three phase assemblages were used to produce Bi2Sr2CaCu2Ox (2212) during sintering: a mixture of 20% Ca-rich 2212+80%2212, partially synthesized 2212, and Bi2Sr2CuOx (2201)+(1/2 Ca2 CuO3+1/2 CuO) (denoted 0011). The mixture of 2201+0011 produced highly pure 2212 within 50 h of heating in air at ≈850°C. Ag tubes were filled with a mixture of 2201+0011 and worked into tapes by a powder-in-tube process. Heat treatments produced microstructures consisting of small, highly textured 2212 grains. Tc values were ≈70K. Transport Jc values at 4.2K were ≈104 A/cm2.