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Title: HIGH ENERGY STORAGE CERAMIC CAPACITOR. Quarterly Report No. 3

Abstract

Development of a BaTiO/sup 3/-- SrTiO/sup 3/ high energy storage ceramic capacitor continued. A large ceramic piece for the final test capacitor was successfully dried and fired and is undergoing contour machining. Materials development work resulted in samples of 98.9% of theoretical density. Samples have been measured up to 300 volts per mil stress and the dielectric constant continued to increase wlth increasing density. (For preceding period see AECU- 3525.) (T.R.H.)

Authors:
Publication Date:
Research Org.:
General Electric Co. Specialty Electronic Components Dept., Auburn, N.Y.
OSTI Identifier:
4354234
Report Number(s):
AECU-3552
NSA Number:
NSA-12-001364
DOE Contract Number:
AT(30-1)-1963
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
United States
Language:
English
Subject:
MINERALOGY, METALLURGY, AND CERAMICS; BARIUM OXIDES; CAPACITORS; CERAMICS; DENSITY; DIELECTRICS; ELECTRIC CONDENSERS; ENERGY; STORAGE; STRONTIUM OXIDES; TITANIUM OXIDES

Citation Formats

Lupfer, D.A.. HIGH ENERGY STORAGE CERAMIC CAPACITOR. Quarterly Report No. 3. United States: N. p., 1958. Web. doi:10.2172/4354234.
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Lupfer, D.A.. HIGH ENERGY STORAGE CERAMIC CAPACITOR. Quarterly Report No. 3. United States. doi:10.2172/4354234.
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Lupfer, D.A.. Fri . "HIGH ENERGY STORAGE CERAMIC CAPACITOR. Quarterly Report No. 3". United States. doi:10.2172/4354234. https://www.osti.gov/servlets/purl/4354234.
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@article{osti_4354234,
title = {HIGH ENERGY STORAGE CERAMIC CAPACITOR. Quarterly Report No. 3},
author = {Lupfer, D.A.},
abstractNote = {Development of a BaTiO/sup 3/-- SrTiO/sup 3/ high energy storage ceramic capacitor continued. A large ceramic piece for the final test capacitor was successfully dried and fired and is undergoing contour machining. Materials development work resulted in samples of 98.9% of theoretical density. Samples have been measured up to 300 volts per mil stress and the dielectric constant continued to increase wlth increasing density. (For preceding period see AECU- 3525.) (T.R.H.)},
doi = {10.2172/4354234},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Oct 31 00:00:00 EST 1958},
month = {Fri Oct 31 00:00:00 EST 1958}
}
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Technical Report:
View Technical Report (3.13 MB)
DOI:  10.2172/4354234
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  • The objective of the program is the development of ceramic materials with high dielectric constant and high dielectric strength values, and suitable for use as dielectrics in capacitors capable of storing large amounts of energy in small volumes. Upon the successful development of materials and processing techniques, twenty encapsulated capacitors will be produced and delivered to the contractor. Developments in materials and sample preparation, ceramic properties and forming, fabrication of large ceramics, electrical measurements, optical studies of titanates, ceramic density measurements, and capacitor measurements and design are given. (For subsequent report in this series see AECU-4165.) (W.D.M.)

  • Improvements in the density of the ceramic capacitor were achieved by the addition of barium. Improvements in the dielectric strength were made by air annealing of five-inch-diameter capacitors. Five-inch-diameter capacitors of relatively high dielectric strength were produced. (For preceding period see AECU-4166.) (W.L.H.)

  • Research and development were directed toward medium (5 in. diameter) disk capacitors and large kiln firing procedures. Disk edge cracking and warping were eliminated. High density, consistently sound disks were produced. One apparently sound 10 in. disk was fired without cracking or warping. Detailed briefringence was found in (Fa, Sr)TiO/sub 3/; further interpretation is in order. Hyperpure materials were made in small lots, and scaling up is underway. Thermal expansion coefficients were determined, and characteristics of materials were measured as a function of temperature. A change in the multiplier relating the uniform field capacitance to the measured capacitance as frictionmore » of the field was found. A discrepancy between the theoretical capacitance and the measured capacitance for a contoured specimen was discovered. Data are included on the effects of atmosphere during firing, density measurements, effects of additions, particle size distribution, and electrical capacitance. (J.R.D.)« less