Melting and vaporization of the 1223 phase in the system (Tl-Pb-Ba-Sr-Ca-Cu-O)

Cook, Lawrence P.; Wong‐Ng, W.; Paranthaman, P

doi:10.6028/jres.101.066

Cited by 3 publications

(2 citation statements)

References 29 publications

(36 reference statements)

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“…The melting and vaporization of the 1223 phase have been investigated using a combination of dynamic methods (differential thermal analysis, thermogravimetry, and effusion) and post-quenching characterization techniques (scanning electron microscopy, energy dispersive x-ray spectrometry, and powder x-ray diffaction) [126]. The melting and vaporization equilibria of the 1223 phase are complex, with as many as seven phases participating simultaneously.…”

Section: Phase Equilibria and Crystallographic Studies Of High-temmentioning

confidence: 99%

Phase equilibria and crystallography of ceramic oxides

Wong‐Ng

Roth

Vanderah

et al. 2001

J. Res. Natl. Inst. Stand. Technol.

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Research in phase equilibria and crystallography has been a tradition in the Ceramics Division at National Bureau of Standards/National Institute of Standatrds and Technology (NBS/NIST) since the early thirties. In the early years, effort was concentrated in areas of Portland cement, ceramic glazes and glasses, instrument bearings, and battery materials. In the past 40 years, a large portion of the work was related to electronic materials, including ferroelectrics, piezoelectrics, ionic conductors, dielectrics, microwave dielectrics, and high-temperature superconductors. As a result of the phase equilibria studies, many new compounds have been discovered. Some of these discoveries have had a significant impact on US industry. Structure determinations of these new phases have often been carried out as a joint effort among NBS/NIST colleagues and also with outside collaborators using both single crystal and neutron and x-ray powder diffraction techniques. All phase equilibria diagrams were included in Phase Diagrams for Ceramists, which are collaborative publications between The American Ceramic Society (ACerS) and NBS/NIST. All x-ray powder diffraction patterns have been included in the Powder Diffraction File (PDF). This article gives a brief account of the history of the development of the phase equilibria and crystallographic research on ceramic oxides in the Ceramics Division. Represented systems, particularly electronic materials, are highlighted.

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Section: Phase Equilibria and Crystallographic Studies Of High-temmentioning

confidence: 99%

Phase equilibria and crystallography of ceramic oxides

Wong‐Ng

Roth

Vanderah

et al. 2001

J. Res. Natl. Inst. Stand. Technol.

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“…Among the Tl 1 Ba 2 Ca n-1 Cu n O 2n+2 superconductors family the n=3 member is important due to its higher critical temperature, excellent fluxpinning properties, higher critical current and irreversibility field H irr [65][66][67][68][69][70]. The Tl-1223 was the first superconducting composition reported among the other members of this family [71]. The single-phase samples of Tl-1223 are difficult to prepare.…”

Section: Tl 1 Ba 2 Ca N-1 Cu N O 2n+2 Superconductorsmentioning

confidence: 99%