Oxide bronze compositions and textured articles manufactured in accordance therewith

A high temperature superconductor article, comprising:

• a substrate or matrix;
• and
• a polycrystalline superconducting layer or filament disposed on top of or embedded in the substrate or matrix, the superconducting layer or filament having a transition temperature of at least 50 K and formed of an oxide bronze material having the formula AxBOy, in which A comprises an alkali, alkaline earth or rare earth metal and in which A has a valence, m, equal to 1, 2 or 3, B comprises a transition metal having a valence, n, less than or equal to 6, 0<x<1 on an atomic ratio basis and y=[(x)(m)+n]/2,
• wherein the superconducting material is extended along a length of the article to allow for conduction of supercurrent along the length of the article.

A power transmission cable, comprising:

• a plurality of helically wound high temperature superconductor articles, the high temperature superconducting articles each comprising:
• a substrate;
• and
• a polycrystalline superconducting layer deposited on the substrate, the superconducting layer having a transition temperature of at least 50 K and formed of a material having the formula AxBOy, in which A comprises an alkali, alkaline earth or rare earth metal and in which A has a valence, m, equal to 1, 2 or 3, B comprises a transition metal having a valence, n, less than or equal to 6, 0<x<1 on an atomic ratio basis and y=[(x)(m)+n]/2,
• wherein the superconducting layer is deposited on the substrate such that grains in the superconducting layer are crystallographically textured.

A textured superconductor article, comprising:

• a substrate;
• and
• a substrate or matrix;
• and
• a textured, polycrystalline superconducting layer or filament disposed on top of or embedded in the substrate or matrix, the superconducting layer or filament having a transition temperature of at least 50 K and formed of an oxide bronze material having the formula AxBOy, in which A comprises an alkali, alkaline earth or rare earth metal and in which A has a valence, m, equal to 1, 2 or 3, B comprises a transition metal having a valence, n, less than or equal to 6, 0<x<1 on an atomic ratio basis and y=[(x)(m)+n]/2,
• wherein the textured superconducting layer is characterized by a full-width-half-maximum (FWHM) of less than or equal to 20 degrees.