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Author: winnie wong-ng

Displaying records 11 to 20 of 154 records.
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11. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903156

12. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903921

13. RECENT INVESTIGATIONS OF Sr-Ca-Co-O THERMOELECTRIC MATERIALS
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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901376

14. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902371

15. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900235

16. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854458

17. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851090

18. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854167

19. Thermopower of Co-doped FeSe0.82
Published: 4/1/2009
Authors: Evan L. Thomas, Winnie K Wong-Ng, Daniel P. Phelan
Abstract: The effect of cobalt doping (0.05 ≤ x ≤ 0.50) on the thermopower of the newly discovered superconductor FeSe0.82 is investigated through electrical and thermal transport measurements. Our results point to the destruction of superconducti ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854463

20. Statistical analysis of a round-robin measurement survey of two candidate materials for a Seebeck coefficient Standard Reference Material
Published: 2/2/2009
Authors: John Lu, Nathan Lowhorn, Winnie K Wong-Ng, Weiping Zhang, Evan L. Thomas, Makoto Otani, Martin L Green, Thanh N. Tran, Chris Caylor, Neil Dilley, Adams Downey, B Edwards, Norbert Elsner, S Ghamaty, Timothy Hogan, Qing Jie, Qiang Li, Joshua Brooks Martin, George S. Nolas, H Obara, Jeffrey Sharp, Rama Venkatasubramanian, Rhonda Willigan, Jihui Yang, Terry Tritt
Abstract: In an effort to develop a Standard Reference Material (SRM ) for Seebeck coefficient, we have conducted a round-robin measurement survey of two candidate materials undoped Bi2Te3 and constantan (55% Cu and 45% Ni alloy). Measurements were performe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854434



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