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Displaying records 121 to 130 of 157 records.
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121. Phase Relations of the SrO-Ho^d2^O^d3^-CuO^dx^ System
Published: 2/1/2000
Authors: Winnie K Wong-Ng, J Dillingham, Lawrence P. Cook
Abstract: The phase diagram of the SrO-R^d2^O^d3^-CuOx system, where R=Ho, was investigated in air. The tie-line relationships of this system were determined. Two ternary phases were found, namely, the green phase SrHo^d2^CuO^d5^ and the A14-24 solid solutio ...

122. Structure and Microwave Dielectric Properties in the x Ca^d2^AlNbO^d6^: (1-x) Ca^d3^Nb^d2^O^d8^ System
Published: 2/1/2000
Authors: Julia Y. Chan, Terrell A Vanderah, Robert S. Roth, Winnie K Wong-Ng, B A Reisner, Richard G. Geyer
Abstract: The structure and dielectric properties of bulk ceramics in the xCa2AlNbO6: (1-x)Ca3Nb2O8 system were studied. Ca2AlNbO6 (P21/n, a = 5.3785(1) , b = 5.4158(1) , c = 7.6259(1) , b = 89.93(1)o) is a double perovskite with structure similar to CaTiO3 ...

123. 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 ...

124. 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 ...

125. 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 ...

126. 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 ...

127. 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 ...

128. 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

129. 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^. ...

130. 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 ...

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