Superdielectric Materials Composed of NaCl, H2O and Porous Alumina
Abstract
To test a theory of the recently discovered phenomenon of superdielectric behavior the
dielectric constants of several ‘pastes’ composed of porous alumina powders filled to the
point of incipient wetness with water containing dissolved sodium chloride, were
measured. The dielectric constants of some of the pastes were greater than 1010, higher
than that of any material ever reported. These results are consistent with this recently
postulated model of superdielectric behavior in porous, non-conductive materials
saturated with ion-containing liquids: Upon the application of an electric field ions
dissolved in the saturating liquid contained in the pores will travel to the ends of pore
filling liquid droplets creating giant dipoles. The fields of these giant dipoles oppose the
applied field, reducing the net field created per unit of charge on the capacitor plates,
effectively increasing charge/voltage ratio, hence capacitance. Other observations
reported herein include; i) the impact of ion concentration on dielectric values, ii) a
maximum voltage similar to that associated with the electrical breakdown of water, iii)
the loss of capacitance upon drying, and iv) the recovery of capacitance upon the addition
of water to a dry super dielectric material. All observations are consistent with the earlier
proposed model of the super dielectric phenomenon.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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