Exploring Multi-Component Superconducting Compounds by a High-Pressure Method and Ceramic Combinatorial Chemistry

In this short review, we provide some new insights into the material synthesis and characterization of modern multi-component superconducting oxides. Two different approaches such as the high-pressure, high-temperature method and ceramic combinatorial chemistry will be reported with application to several typical examples. First, we highlight the key role of the extreme conditions in the growth of Fe-based superconductors, where a careful control of the composition-structure relation is vital for understanding the microscopic physics. The availability of high-quality LnFeAsO (Ln = lanthanide) single crystals with substitution of O by F, Sm by Th, Fe by Co, and As by P allowed us to measure intrinsic and anisotropic superconducting properties such as Hc2, Jc. Furthermore, we demonstrate that combinatorial ceramic chemistry is an efficient way to search for new superconducting compounds. A single-sample synthesis concept based on multi-element ceramic mixtures can produce a variety of local products. Such a system needs local probe analyses and separation techniques to identify compounds of interest. We present the results obtained from random mixtures of Ca, Sr, Ba, La, Zr, Pb, Tl, Y, Bi, and Cu oxides reacted at different conditions. By adding Zr but removing Tl, Y, and Bi, the bulk state superconductivity got enhanced up to about 122 K.

Ceramic formulation and processing design for plutonium disposition

The focus of this research programme is to develop a single phase ceramic wasteform for waste PuO2 that is unsuitable for fuel manufacture. A suite of synthetic mineral systems have been considered including titanate, zirconate, phosphate and silicate based matrices. Although a wealth of information on plutonium disposition in some of the systems exists in the literature, the data is not always directly comparable which hinders comparison between different ceramic hosts. The crux of this research has been to compile a database of information on the proposed hosts to allow impartial comparison of the relative merits of each system. © 2009 Materials Research Society.

Conversaciones y lecturas familiares : sobre historia, biografía, crítica, literatura, ciencias y conocimientos útiles /

Essays.

Notas útiles para el intercambio comercial entre Guatemala y España,

Mode of access: Internet.

A rudimentary treatise on the manufacture of bricks and tiles, containing an outline of the principles of brickmaking.

Preservation photocopy.

Properties and preparation of ceramic insulators for spark plugs /

"Pre-print from fifth annual report."

Ceramic applications in turbine engines.

Energy Department, Office of Vehicle and Engine Research and Development, Washington, D.C.

Ceramic abstracts.

MINPROC

Typical examples of Persian and Oriental ceramic art /

"The issue is limited to two hundred and fifty copies."

The ceramic art of Great Britain from pre-historic times down to the present day : being a history of the ancient and modern pottery and porcelain works of the kingdom and of their productions of every class /

Mode of access: Internet.

A text-book on ceramic calculations, with examples,

Mode of access: Internet.

Ceramic engineering building, University of Illinois.

"November 20, 1916."

Tiles

Tiles, Islamic, Ilkhanid; D: 7 63/64 in. (star tiles); 8 11/32 in. x 8 17/64 in. (cross tiles); fritware with moulded design and lustre decoration

The thermal expansion of uranium pyrophosphate and of ceramic bodies in the system UO-UPO; internal research,

Cover title.

Vocabulario de todas las voces que faltan á los diccionarios de la lengua castellana, pubicados [!] por la Academia, Dominguez, Caballero, Peñalver (Panléxico), Campuzano, Salva, Barcia, etc., etc.; ó sea, Suplemento necesario á los diccionarios de la lengua castellana, publicados hasta el dia, para que puedan ser completamente útiles.

2a ed.