Superconductor borides

Numerous ceramics are deposited via chemical vapor deposition. Oxide, carbide, nitride, and boride films can all be produced from gas phase precursors. This section gives details on the production-scale reactions for materials that are widely produced. In addition, a survey of the latest research including novel precursors and chemical reactions is provided. The discussion begins with the mature technologies of silicon dioxide, aluminum oxide, and silicon nitride CVD. Then the focus turns to the deposition of thin films having characteristics that are attractive for future applications in microelectronics, micromachinery, and hard coatings for tools and parts. These materials include aluminum nitride, boron nitride, titanium nitride, titanium dioxide, silicon carbide, and mixed-metal oxides such as those of the perovskite structure and those used as high To superconductors. 

Carbide, Nitride, Boride, and Sulfide (Chevrel) Superconductors. 

Searching for higher transition superconductors was not limited to the A15 alloys. Many carbides, nitrides, borides, sulfides, etc. were also found to be superconducting. 

Some selected superconducting carbides, nitrides, borides, and sulfides are presented in Table 1 with their values. Among these superconducting ceramics, the most influential factor was the crystal structure. Many of the important superconductors were based on the NaCl-type structure (also referred to as the B1 structure by metallurgists) and the... 

Although this summary of metal borides is brief, it illustrates the complexity of structures frequently encountered in the chemistry of boron. Research interest in metal borides has been stimulated since 2001 by the discovery that MgB2 is a superconductor with a critical temperature, T, of 39 K. We explore this property further in Section 27.4. 

Shortly after acceptance of my manuscripts on the Chevrel phases (15) and the lanthanide rhodium borides (16) the initial scientific reports on the high copper oxide superconductors... 

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