CAPACITY ENERGY STORAGE AT CRYOGENIC TEMPERATURES

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$342,000.00
Award Year:
1985
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
967
Agency Tracking Number:
967
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
P.o. Box 346, Westerville, OH, 43081
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr. W. N. Lawless
(614) 882-2231
Business Contact:
() -
Research Institution:
n/a
Abstract
A BASIC RESEARCH PROGRAM IS PROPOSED TO STUDY CAPACITIVE ENERGY STORAGE AT 77 K BASED ON CADMIUM-LEAD NIOBATE CERAMICS FOR TWO REASONS: (1) THE DIELECTRIC CONSTANT IS UNUSUALLY LARGE AT THESE TEMPERATURES (\8000); AND (2) THE FERROELECTRIC TRANSITION CAN BE COMPOSITIONALLY ADJUSTED BELOW 77 K. TWO ADVANTAGES ACCRUE: (1) THE STORED ENERGY DENSITY AT 77 K IS MAXIMIZED; AND (2) ON DISCHARGE (I.E., E O) THE DIELECTRIC COOLS BY ADIABATIC DEPOLARIZATION, THUS PARTIALLY COMPENSATING HEATING EFFECTS. ADDITIONALLY, AT CRYOGENIC TEMPERATURES DIELECTRIC BREAKDOWN STRENGTHS INCREASE AND METAL RESISTIVITIES DECREASE. A ROUGH ESTIMATE SUGGESTS THAT ENERGY DENSITIES -25 J/CM3 (-4 J/G) MIGHT BE ACHIEVED. THE RESEARCH PLAN CALLS FOR DIELECTRIC, ELECTROCALORIC, AND DIELECTRIC-BREAKDOWN STUDIES AT LIQUID NITROGEN TEMPERATURES ON PROTOTYPE, MULTILAYER, CERAMIC CAPACITORS. EXPERIMENTAL DATA WILL BE ANALYZED USING GIBBS AND HELMHOLTZ THERMODYNAMIC FUNCTIONS.

* information listed above is at the time of submission.

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