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Harris and Eliza Kempner
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Activated transport in AMTEC electrodes
Transport of alkali metal atoms through porous cathodes of alkali metal thermal-to-electric converter (AMTEC) cells is responsible for significant, reducible losses in the electrical performance of these cells. Experimental evidence for activated transport of metal atoms at grain surfaces and boundaries within some AMTEC electrodes has been derived from temperature dependent studies as well as from analysis of the detailed frequency dependence of ac impedance results for other electrodes, including thin, mature molybdenum electrodes which exhibit transport dominated by free molecular flow of sodium gas at low frequencies or dc conditions. Activated surface transport will almost always exist in parallel with free molecular flow transport, and the process of alkali atom adsorption/desorption from the electrode surface will invariably be part of the transport process, and possibly a dominant part in some cases. Little can be learned about the detailed mass transport process from the ac impedance or current voltage curves of an electrode at one set of operating parameters, because the transport process includes a number of important physical parameters that are not all uniquely determined by one experiment. The temperature dependence of diffusion coefficient of the alkali metal through the electrode in several cases provides an activation energy and …
Date:
January 1, 1992
Creator:
Williams, R.M.; Jeffries-Nakamura, B.; Ryan, M.A.; Underwood, M.L.; O'Connor, D. & Kikkert, S.
Object Type:
Article
System:
The UNT Digital Library
Advances in high temperature components for AMTEC (alkali metal thermal-to-electric converter)
Long lifetimes are required for AMTEC (or sodium heat engine) components for aerospace and terrestrial applications, and the high heat input temperature as well as the alkali metal liquid and vapor environment places unusual demands on the materials used to construct AMTEC devices. In addition, it is important to maximize device efficiency and power density, while maintaining a long life capability. In addition to the electrode, which must provide both efficient electrode kinetics, transport of the alkali metal, and low electrical resistance, other high temperature components of the cell face equally demanding requirements. The beta{double prime} alumina solid electrolyte (BASE), the seal between the BASE ceramic and its metallic transition to the hot alkali metal (liquid or vapor) source, and metallic components of the device are exposed to hot liquid alkali metal. Modification of AMTEC components may also be useful in optimizing the device for particular operating conditions. In particular, a potassium AMTEC may be expected to operate more efficiently at lower temperatures.
Date:
January 1, 1991
Creator:
Williams, R.M.; Jeffries-Nakamura, B.; Underwood, M.L.; Ryan, M.A.; O'Connor, D. & Kikkert, S.
Object Type:
Article
System:
The UNT Digital Library
Aeronautics Star, January 2003, Special Edition
Special issue of a bimonthly newsletter published for employees of the Lockheed Martin Aeronautics Division providing a summary update, month-by-month, of work conducted during calendar year 2002.
Date:
January 2003
Creator:
Lockheed Martin Astronautics Corporation
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Aeronautics Star, Volume 4 , Number 1, January/February 2003
Monthly newsletter published for employees of Lockheed Martin Aeronautics Co. containing work-related information, updates about employees, and other news.
Date:
January 2003
Creator:
Lockheed Martin Astronautics Corporation
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Aeronautics Star, Volume 5, Number 1, January/February 2004
Bimonthly newsletter published for employees of Lockheed Martin Co. containing work-related information, updates about employees, and other news.
Date:
January 2004
Creator:
Lockheed Martin Astronautics (Firm)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Aeronautics Star, Volume 6, Number 1, January/February 2005
Bimonthly newsletter published for employees of Lockheed Martin Aeronautics Co. containing work-related information, updates about employees, and other news.
Date:
January 2005
Creator:
Lockheed Martin Astronautics Corporation
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
AF28 - Base Input
Contains base input from Beale Air Force Base, CA
Date:
January 4, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Aircraft Delivery Order #6]
Orders for several Air Force Pilots and WASP to ferry aircraft from Wichita Kansas to air bases in various U.S. cities.
Date:
January 28, 1944
Creator:
555th Army Air Forces Base Unit - 5th Ferrying Group
Object Type:
Text
System:
The Portal to Texas History
Analysis of the Mount Laguna Photovoltaic Cell Failure
From summary: The purpose of this analysis is to provide photovoltaic (P/V) system design and field engineers with an understanding of the primary factors which can cause individual P/V cells in a module or an array to be forced into reverse bias and eventual failure and to provide guidelines for the adequate protection of the cells.
Date:
January 1981
Creator:
Anderson, E.; Lambarski, T.; Kadlec, D.; Nakos, J. & Turfler, R. M.
Object Type:
Report
System:
The UNT Digital Library
Application of a Windshield-Display System to the Low-Altitude Bombing Problem
From Introduction: "The design and flight evaluation of an airborne target simulator for use in tracking studies of fighter-type airplanes equipped with optical gunsights have recently been reported (ref. 1). In this equipment the target airplane was represented by a movable dot of light projected on the windshield of the test airplane."
Date:
January 4, 1957
Creator:
Barnett, Robert M.; Kauffman, William M. & Fulcher, Elmer C.
Object Type:
Report
System:
The UNT Digital Library
Base Input - Coronado-CA
Base Input - Coronado-CA Naval Air Depot North Island
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input Naval base Coronado-CA
Base Input Naval Base Coronado-CA Navy/MC
Date:
January 11, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input - Naval Base Ventura City, CA
Base Input - Naval Base Ventura City, CA.
Date:
January 5, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Base Input - Naval Base Ventura City, CA
Base Input - Naval Base Ventura City, CA
Date:
January 5, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
BRAC Analysis - Facilities Review
Contains a facilities review of Naval Air Weapons Station China Lake, CA
Date:
January 12, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
BRAC Analysis - Notes and Research
Contains notes and research from Les Farrington regarding California
Date:
January 5, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
BRAC Analysis - Notes and Research
Contains notes and research from Navy Team Analysts Joe Barrett and Brian McDaniel regarding Marine Corps Recruit Depot, San Diego, CA
Date:
January 4, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
BRAC Commission Executive Correspondence
Contains Executive Correspondence regarding MCRD San Diego, CA
Date:
January 11, 2006
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
[Card from Charles L. Sasportas to D. W. Kempner, January 4, 1944]
Letter from Charles L. Sasportas to D. W. Kempner discussing stopping in Galveston to visit as he travels to California.
Date:
January 4, 1944
Creator:
Sasportas, Charlies L.
Object Type:
Letter
System:
The Portal to Texas History
Clearinghouse Material
Clearinghouse request concerning Sierra Army Depot.
Date:
January 4, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
[Client Card: Mr. Benimino Bufano]
Client card describing work completed at the Roman Bronze Works Foundry for Mr. Benimino Bufano, including a job number, brief description, monetary amount, and dates associated with each entry. Pieces included: "Group of Mother and Children" (47" x 20.5" x 8"), and "Portrait Head" (2 copies, 10.5" x 9" x 9").
Date:
1958-01/1961-04
Creator:
Roman Bronze Works Foundry
Object Type:
Text
System:
The Portal to Texas History
[Clipping: Flying right, thanks to one special Air Force major]
Newspaper clipping describing the experiences of Marjorie Wakeham as a member of the Women Airforce Service Pilots and her great leadership as a major in the U.S. Air Force.
Date:
January 9, 1997
Creator:
Haplin, Bill
Object Type:
Clipping
System:
The Portal to Texas History
[Clipping: Fort Worth subway a success]
Newspaper clipping from San Jose Mercury, titled, "Mini-Subway Pulls Them In," published January 26, 1976.
Date:
January 26, 1972
Creator:
San Jose Mercury
Object Type:
Clipping
System:
The UNT Digital Library
[Clipping: 'Sky Girls']
Newspaper clipping discussing Joyce Secciani, a Women Airforce Service Pilot, and her story. It also discusses gender discrimination within the WASP program.
Date:
January 9, 2004
Creator:
unknown
Object Type:
Clipping
System:
The Portal to Texas History