Ceramic superconductors

CERAMCS-ELECTRONIC PROPERTIES AND MATERIALSTHUCTURE] (Vol5) -in superconductors [CERAMICS AS ELECTRICAL MATERIALS] (Vol5)... 

In this chapter, we ll look at both metals and solid-state materials. We ll examine the natural sources of the metallic elements, the methods used to obtain metals from their ores, and the models used to describe the bonding in metals. We ll also look at the structure, bonding, properties, and applications of semiconductors, superconductors, ceramics, and composites. 

Today, from an engineering point of view, the name superplasticity is ascribed to a polycrystalline material pulled out to very high tensile elongations prior to failure with necking-free strain. This phenomenon is usually found in many metals, alloys, intermetallics, composites and ceramics (recently in high-temperature superconductor ceramics) when the grain size is small enough, less than 10 pm for metals and less than 1 pm for ceramics. 

Examples of the sol-gel process for ceramic powder preparation include titanate and aluminates , cuprate superconductors , ceramic packaging materials, and BaTiOs. ... 

As with end products themselves there is an endless need worldwide to develop new and improved plastic materials to meet new design performance and processability requirements [3]. These new materials include plastics, composites, superconductors, ceramics, metals, aluminum, concrete, and others. Plastics have been revolutionizing our times. The greater understanding of plastics performance and design capabilities assures their future growth in providing widespread benefits. 

The preparation of high-purity metal oxides. Warm superconductor ceramics. Y(0R)3-Hf(0R)3-H20 Ln(OC3H7-i)3-M(OC3H7-i),-M (OC3H7-i)y Y(P-diketonate)3 [114,115] [116]... 

Sale F.R., Mahloojchi F. Citrate gel processing of oxide superconductors. Ceram. Int. 1988 14 229-237... 

This article reviews the stmcture of representative high-temperature superconductor ceramic crystals. 

The manufacture of rare earth barium copper oxide high-temperature superconductor ceramics is carried out by sintering at 930-1000°C in ozone atmosphere containing oxygen. Y Oj, BaC03 and CuO are mixed, calcinated, pulverized, pressed and sintered at 950°C in the presence of ozone-oxygen mixture after which they are gradually cooled to the critical superconductive temperature 94K [155]. 

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