Electricity: electrical systems and devices – Electrolytic systems or devices – Current interruption type
Patent
1983-12-21
1986-07-01
Hickey, R. J.
Electricity: electrical systems and devices
Electrolytic systems or devices
Current interruption type
307117, 357 2, 357 4, 357 28, 357 61, H01G 918, H01L 4500
Patent
active
045983380
ABSTRACT:
A reusable fast opening switch for transferring energy, in the form of a high power pulse, from an electromagnetic storage device such as an inductor into a load. The switch is efficient, compact, fast and reusable. The switch comprises a ferromagnetic semiconductor which undergoes a fast transition between conductive and insulating states at a critical temperature and which undergoes the transition without a phase change in its crystal structure. A semiconductor such as europium rich europhous oxide, which undergoes a conductor to insulator transition when it is joule heated from its conductor state, can be used to form the switch.
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M. Shafer et al., "Relationship of Crystal Growth Parameters to the Stoichiometry of EuO as Determined by I.R. Conductivity Measurements," J. Phys. Chem. Solids, 1972, vol. 33, pp. 2251-2266.
J. Torrance et al., "Bound Magnetic Polarons and the Insulator-Metal Transition in EuO," Physical Review Letters, vol. 29, No. 17, 23 Oct. 1972, pp. 1168-1171.
A. Kornblit et al., "Heat Capacity of RbMnF.sub.3 and EuO Near the Magnetic Phase Transitions," Physics Letters, vol. 43A, No. 6, 23 Apr. 1973, pp. 531-532.
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Emin David
Van Devender John P.
Hickey R. J.
Hightower Judson R.
Libman George H.
Sopp Albert
The United States of America as represented by the United States
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