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You searched on: Author: winnie wong-ng

Displaying records 11 to 20 of 156 records.
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11. High Resolution Reference X-ray Diffraction Pattern for Bis(2-methylimidazolyl)-Zinc, C8H10N4Zn (ZIF-8)
Published: 4/24/2011
Authors: Winnie K Wong-Ng, James A Kaduk, Laura Espinal, Matthew Suchomel, Andrew John Allen
Abstract: The family of zeolitic imidazolate framework (ZIF) compounds are efficient sorbent materials that can be used for catalytic, ion exchange, gas storage and gas separation applications. A high resolution reference x-ray powder diffraction pattern for o ...

12. On the Design of High Efficiency Thermoelectric Type I Clathrates through Transition Metal Doping
Published: 4/14/2010
Authors: Winnie K Wong-Ng, X Shi, Joing Yang, S Bai, Jihui Yang, Hsin Wang, James Salvador, W Zhang, L Chen
Abstract: We have developed a scheme for improving the thermoelectric properties of type I Ba8Ga16Ge30 clathrates by doping transition metals, TM, on the Ga sites. TM doping introduces charge distortion and lattice defects into the materials which increases t ...

13. Phase Compatibility of the Thermoelectric Compounds in the Sr-Ca-Co-O System
Published: 4/14/2010
Authors: Winnie K Wong-Ng, Guangyao Liu, Joshua Brooks Martin, Evan L. Thomas, Nathan Lowhorn, James A. Kaduk
Abstract: Two low-dimensional cobaltite series in the Sr-Ca-Co-O system have been investigated for their solid solution limit, structure, and compatibility phase relationships (850 deg C in air). Thermoelectric properties have been measured for selected member ...

14. The 2009 Material Research Society (MRS) Spring Meeting Report
Published: 12/31/2009
Author: Winnie K Wong-Ng
Abstract: The 2009 Materials Research Society (MRS) Spring Meeting took place in San Francisco Moscone Center from April 13 through 17. This large-scale meeting included forty-one technical symposia, nine symposium tutorials, three poster sessions, a popular S ...

Published: 12/21/2009
Authors: Winnie K Wong-Ng, Guangyao Liu, Makoto Otani, Evan L. Thomas, Nathan Lowhorn, Martin L Green, James A. Kaduk
Abstract: Three low-dimension cobaltites in the Sr-Ca-Co-O system have been studied for their structure and thermoelectric properties. Using x-ray pole figure construction technique, a Ca3Co4O9 thin film showed excellent fiber texture but no ab in-plane textur ...

16. Reference X-ray Powder Diffraction Pattern of a New High-Pressure Phase, CaCo2O4
Published: 12/17/2009
Authors: Winnie K Wong-Ng, James A Kaduk, Masaaki Isobe
Abstract: Research in new cobaltites is important for waste heat recovery applications. A new calcium cobaltite phase, CaCo2O4, prepared under high pressure, has been reported recently to have a large Seebeck coefficient. This paper reports the reference x-ray ...

17. Enhanced Mass Transport in Ultra-Rapidly-Heated Ni/Si Thin-Film Multilayers
Published: 11/15/2009
Authors: Lawrence P. Cook, Richard E Cavicchi, Nabil Bassim, Susie Eustis, Winnie K Wong-Ng, Igor Levin, Ursula R Kattner, Carelyn E Campbell, Christopher B Montgomery, William F. Egelhoff Jr., Mark D Vaudin
Abstract: We have investigated multilayer and bilayer Ni/Si thin films by nano-differential scanning calorimetry (DSC) at ultra rapid scan rates, in a temperature-time regime not accessible with conventional apparatus. DSC experiments were completed at slower ...

18. Development of a Seebeck Coefficient Standard Reference Material
Published: 8/7/2009
Authors: Nathan Lowhorn, Winnie K Wong-Ng, John Lu, Evan L. Thomas, Makoto Otani, Martin L Green, Neil Dilley, Jeffrey Sharp, Thanh N. Tran
Abstract: We have successfully developed a Seebeck coefficient Standard Reference Material (SRM ), Bi2Te3, that is crucial for interlaboratory data comparison and for instrument calibration. Certification measurements were performed using two different techniq ...

19. Thermoelectric and Structural Characterization of Ba2Ho(Cu3-xCox)O6+y
Published: 6/13/2009
Authors: Winnie K Wong-Ng, Z Yang, Y F Hu, Qingzhen Huang, Nathan Lowhorn, Makoto Otani, James A Kaduk, Martin L Green, Q Li
Abstract: The search for thermoelectric materials for power generation and for solid-state cooling have led to the increased interest of layered cobalt-containing oxides because of their thermal stability at high temperature and their desirable thermoelectric ...

20. A High-throughput Screening System for Thermoelectric Material Exploration Based on Combinatorial Film Approach
Published: 5/7/2009
Authors: Makoto Otani, Evan L. Thomas, Winnie K Wong-Ng, Peter K. Schenck, Nathan Lowhorn, Martin L Green, Hiroyuki Ohguchi
Abstract: A high-throughput system that consists of a combinatorial tool (a sputtering deposition tool and a pulsed laser deposition tool) and two property screening devices, developed at NIST, was used for thermoelectric material exploration. The thermoelectr ...

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