Ceramic And Glass Patents (Class 361/320)
  • Patent number: 4169280
    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
  • Patent number: 4114120
    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.
    Type: Grant
    Filed: November 23, 1976
    Date of Patent: September 12, 1978
    Assignee: Dielectric Laboratories, Inc.
    Inventor: David A. Lupfer
  • Patent number: 4106075
    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.
    Type: Grant
    Filed: March 17, 1976
    Date of Patent: August 8, 1978
    Assignee: Draloric Electronic GmbH
    Inventors: Georg Baumann, Helmut Hoffmann
  • Patent number: 4101952
    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.
    Type: Grant
    Filed: August 17, 1976
    Date of Patent: July 18, 1978
    Assignee: Sprague Electric Company
    Inventor: Ian Burn
  • Patent number: 4089038
    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.
    Type: Grant
    Filed: March 30, 1976
    Date of Patent: May 9, 1978
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventor: Rudolph J. Bacher
  • Patent number: 4071881
    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.
    Type: Grant
    Filed: March 30, 1976
    Date of Patent: January 31, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Rudolph John Bacher
  • Patent number: 4061584
    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.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: December 6, 1977
    Assignee: General Electric Company
    Inventors: Roland T. Girard, George A. Rice
  • Patent number: 4054532
    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