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Author: winnie wong-ng

Displaying records 121 to 130 of 154 records.
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121. Structural investigation of (Sr^d4-{delta}^Ca^d{delta}^)PtO^d6^ Using X-Ray Rietveld Refinement
Published: 8/16/1999
Authors: Winnie K Wong-Ng, James A Kaduk, R A Young, F Jiang
Abstract: The structures of the solid solution series (Sr^d4-{delta}^Ca^d{delta}^)PtO^d6^, with {delta} = 0, 0.85(1), 2, and 3, have been investigated using the Rietveld refinement technique with laboratory x-ray powder data. A complete solid solution between ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850208

122. Primary Phase Field of the Pb-Doped 2223 High Tc Superconductor in the (Bi,Pb)-Sr-Ca-Cu-O System
Series: Journal of Research (NIST JRES)
Published: 7/23/1999
Authors: Winnie K Wong-Ng, Lawrence P. Cook, Anthony J Kearsley, W Greenwood
Abstract: Both liquidus and subsolidus phase equilibrium data are of central importance for applications of high temperature superconductors in the (Bi,Pb)-Sr-Ca-Cu-O system. The subsolidus equilibria of the 110K high Tc Pb-doped 2223 ((Bi,Pb),Sr,Ca,Cu) phase ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850253

123. Local Environments of Three Forms of Ba^d2^Ycu^d3^O^d6+x^
Published: 3/12/1999
Authors: Winnie K Wong-Ng, M Melamud, Lawrence Herman Bennett
Abstract: The Wigner-Seitz local atomic cell construction procedure, provides a topological means for comparing series of related structures in terms of the number and type of nearest neighbors. We used this construction to further our understanding of the ch ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850252

124. Crystal Structures and Reference Powder Patterns of BaR^d2^ZnO^d5^ (R=La, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er, and Tm)
Series: Journal of Research (NIST JRES)
Published: 3/1/1999
Authors: James A Kaduk, Winnie K Wong-Ng, W Greenwood, J Dillingham, B H. Toby
Abstract: Reference x-ray patterns and the crystal structure of the lanthanide compounds, BaR^d2^ZnO^d5^, in which R=La, Nd, Sm, Eu, Gd, Dy, Ho, Y, and Er, were studied by x-ray Rietveld refinement technique. A structural trend was confirmed for this series o ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850264

125. Characterization of Ternary Compounds in the BaO:Fe^d2^O^d3^:TiO^d2^ System: Ba^d6^Fe^d45^Ti^d17^O^d106^ and BaFe^d11^Ti^d3^O^d23^
Published: 1/1/1999
Authors: Terrell A Vanderah, Winnie K Wong-Ng, B H. Toby, V. M. Browning, Robert D Shull, Richard G. Geyer, Robert S. Roth
Abstract: Single crystals of Ba^d6^Fe^d45^Ti^d17^O^d106^ and BaFe^d11^Ti^d3^O^d23^ were obtained as major and minor co-products, respectively, by slow-cooling an off-stoichiometric BaO:Fe^d2^O^d3^:TiO^d2^ melt. The former compound exhibits variable stoichiome ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850204

126. Liquidus Diagram of the Ba-Y-Cu-O System in the Vicinity of the Ba^d2^YCu^d3^O^d6+x^ Phase Field
Series: Journal of Research (NIST JRES)
Published: 7/1/1998
Authors: Winnie K Wong-Ng, Lawrence P. Cook
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850244

127. Effect of P^do2^ and Ag on the Phase Formation of the Pb-2223 Superconductor
Published: 6/25/1998
Authors: Winnie K Wong-Ng, Lawrence P. Cook, W Greenwood
Abstract: The chemical reactions and the compositional characteristics of liquids which lead to the phase formation of the Pb-2223 ((Bi,Pb):Sr:Ca:Cu:O) superconductor have been studied for a precursor composition of Bi^d1.8^Pb^do.4^Sr^d2^Ca^d2.2^Cu^d3^O^dx^. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850188

128. Pb-Distribution in a Five-Phase (Bi, Pd)-Sr-Ca-Cu-O Assemblage
Published: 3/12/1998
Authors: Lawrence P. Cook, Winnie K Wong-Ng
Abstract: The partitioning of lead between phases in the nominal five-phase assemblage: (Pb,Bi)^d3^Sr^d2^Ca^d2^CuO^dx^ + (Ca,Sr)^d2^PbO^d4^ + (Bi,Pb)^d2^Sr^d2^CaCu^d2^O^dx^ + (Ca,Sr)O + Liquid has been investigated in an atmosphere of 7.5% O^d2^925% Ar. Sampl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850161

129. Impact of Recent Advances in Synthesis & Processing of Ceramic Superconductors, American Ceramic Society High Temperature Superconductor Symposium Volume
Published: 6/5/1997
Authors: Winnie K Wong-Ng, U Balachandran, A S Bhalla
Abstract: The contents of this volume comprise the proceedings of the 1997 high Temperature Superconductor Symposium titled Impact of Recent Advances in synthesis and Processing of Ceramic Superconductors, sponsored by the American Ceramic Society. This sympo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850162

130. A Report on the 1999 American Crystallographic Association (ACA) Annual Meeting
Published: Date unknown
Author: Winnie K Wong-Ng
Abstract: The 1999 ACA Annual meeting took place at the Buffalo convention center, New York, from May 22 to 27. This meeting was held in conjucntion with the American Association for Crystal Growth. A brief description of the scientific and social program of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850338



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