Tape processing of HBCCO, BSCCO, and YBCO thick films on metallic substrates with high J(c) by the spray/compress technique

A simple spray/compress technique has been developed for the fabrication of thick film tapes of HBCCO, BSCCO, and YBCO on metallic substrates with hig h J(C). The technique has successfully incorporated crucial processing fact ors to achieve composition uniformity, phase purity, preferred microstructu re, grain alignment, and high density for high temperature superconducting tapes of high performance. We have obtained a J(C) of 8.8x10(4) A/cm(2) in YBa2Cu3O6+delta thick films on Ag/Pd substrates at 77K and self-field; 7x10 (4) A/cm(2) in HgBa2Ca2Cu3O8+delta thick films on Ni substrates with a buff er layer at 77K and self-field; and 5x10(5) A/cm(2) and 3x10(5) A/cm(2) in Bi2Sr2CaCu2Ox thick films on Ni substrates with a buffer layer at 4.2K in s elf-field and 8T, respectively.