Abstract: A method for rendering glass nonfogging (to condensation fog) by sandwiching the glass between two electrodes such that the glass functions as the dielectric of a capacitor, a large alternating current (AC) voltage is applied across the electrodes for a selected time period causing the glass to absorb a charge, and the electrodes are removed. The glass absorbs a charge from the electrodes rendering it nonfogging. The glass surface is undamaged by application of the AC voltage, and normal optical properties are unaffected. This method can be applied to optical surfaces such as lenses, auto windshields, mirrors, etc., wherever condensation fog on glass is a problem.
Type:
Grant
Filed:
July 13, 1978
Date of Patent:
September 25, 1979
Assignee:
The United States of America as represented by the United States Department of Energy
Inventors:
David E. Lord, Gary W. Carter, Richard R. Petrini
Abstract: An improved capacitor for use in stripline applications which consists of a dielectric material which is plane parallel and has on its two surfaces electrodes forming plates thereof with the width of the dielectric material and the electrodes selected to match the width of the stripline to which the capacitor is to be attached thereby minimizing disturbances and discontinuities in the stripline circuit.
Abstract: The invention concerns a densely sintered ceramic dielectric with a loss factor less than or equal to 1.times.10.sup.-3 and a substantially linear temperature dependence of the capacitance based on TiO.sub.2 and/or ZrO.sub.2, and/or the compounds of TiO.sub.2, ZrO, Nb.sub.2 O.sub.5 and/or Ta.sub.2 O.sub.5 with oxides of the alkali metals, alkaline earth metals or rare earth metals in the form generally used for the production of ceramic dielectrics.
Abstract: A monolithic ceramic capacitor has base-metal electrodes buried in a high dielectric constant reduction resistant glass-ceramic body. The glass component is an alkaline earth aluminoborate glass. The ceramic component is a barium titanate. The capacitor body is sintered at from 950.degree. C to 1080.degree. C in a low partial oxygen atmosphere. The buried electrode may be elementary copper.
Abstract: Dielectric powder compositions of certain alkaline earth metal zirconates and/or aluminates plus a glass, useful for forming dielectric layers in multilayer electrode/dielectric structures on an alumina substrate. Also, dispersions of such compositions in a vehicle and the resultant multilayer structures.
Abstract: Dielectricpowder compositions of magnesium titanate plus a glass, useful for forming dielectric layers in multilayer electrode/dielectric structures on an alumina substrate. Also, dispersions of such compositions in a vehicle and the resultant multilayer structures.
Abstract: An improved high dielectric constant ink useful in making thick film capacitors is disclosed in which a dielectric material is combined with a glass bonding agent having at least one electropositive element therein which is common with the powdered, high dielectric material which is one selected from the group consisting of chemically pure barium titanate and chemically pure barium titanate modified with from about 0.125% to about 5.0% by weight of a metal oxide additive. The glass bonding agent is an alkali-free binder comprising from 3 percent to 7 percent by total weight of the dielectric and binder materials.
Abstract: A ceramic compound having the formula (La.sub.x A.sup.+2.sub.1-x).sub.2 (Ti.sub.x B.sup.+5.sub.1-x).sub.2 O.sub.7 wherein A.sup.+2 is a positive divalent element selected from the group consisting of Ba, Ca, Cd, Mg, Sr and mixtures thereof and B.sup.+5 is a positive pentavalent element selected from the group consisting of Sb, Mo, Nb, Ta, W and mixtures thereof and x is a numeral ranging from 0.70 to 0.99. This compound is characterized by a relatively small temperature coefficient of permittivity, a relatively high insulation resistance, a relatively low loss factor and is compatible with relatively low cost noble metals, making it useful for forming dielectric elements in monolithic multi-layer capacitor elements.
Type:
Grant
Filed:
January 23, 1976
Date of Patent:
October 18, 1977
Assignee:
Siemens Aktiengesellschaft
Inventors:
Leopold Hanke, Guenther Hoffmann, Helmut Schmelz