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7341639 Electroceramic component comprising a plurality of contact surfaces  
A method produces a component having a ceramic base body and contact surfaces on opposite sides of the ceramic base body. The method includes forming first protective layers on the opposite sides...
7300620 Method for manufacturing varistor  
The raw material for a ZnO—Pr-based varistor is mixed with cobalt and potassium to prepare a ceramic raw material powder. Potassium, which is an alkali metal, is added in the form of KClO 4 , KHC...
7189297 Method of manufacturing ESD protection component  
A method of manufacturing an Electro Static Discharge (ESD) protection componentin which slurry including varistor particles and a resin binder is produced, and a varistor green sheet is formed...
6878304 Reduction resistant thermistor, method of production thereof, and temperature sensor  
A highly accurate reduction resistant thermistor exhibiting stable resistance characteristics even under conditions where the inside of a metal case of a temperature sensor becomes a reducing...
6743381 Process for forming varistor ink composition  
A process for forming a thixotropic ink for use in manufacturing the ceramic of a zinc oxide varistor where the ceramic includes zinc, oxygen and a plurality of additive elements. The process...
6620346 Varistors based on nanocrystalline powders produced by mechanical grinding  
The invention concerns novel varistors based on zinc oxide and a method for making same, which consists in using as base products nanocrystalline powders obtained by high-intensity mechanical...
6346496 Composite material for positive temperature coefficient thermistor, ceramic for positive temperature coefficient thermistor and method for manufacturing ceramics for positive temperature coefficient thermistor  
A ceramic for the PTC thermistor having a resistivity at room temperature of 5 Ω·cm or less, static withstanding voltage of 60 V/mm or more and temperature resistance coefficient of 9.0 %/° C.,...
6183685 Varistor manufacturing method  
Apparatus for producing multilayer varistors using ceramic ink and electrode ink consists of a succession of stations, in which alternating layers of ceramic ink and electrode ink are laid down on...
6146581 Method of manufacturing a ceramic component with a cermet body  
A method of manufacturing a ceramic component including at least one cermet body, especially a cermet electrode, in which the costs are reduced and the ceramic component can be produced in...
6143207 Wide-range thermistor material and method for producing it  
Provided are wide-range thermistor materials with high responsibility, which have linear resistance temperature characteristics and a large rate of temperature-dependent resistance change in wide...
5854586 Rare earth doped zinc oxide varistors  
A varistor includes a Bi-free, essentially homogeneous sintered body of a ceramic composition including, expressed as nominal weight %, 0.2-4.0% oxide of at least one rare earth element, 0.5-4.0%...
5807510 Electric resistance element exhibiting voltage nonlinearity characteristic and method of manufacturing the same  
A composition for electric material containing as a primary component zinc oxide. The composition further contains at least one of rare-earth elements in a range of 0.01 mol % to 3.0 mol % in terms...
5759480 Method of firing and sintering a ceramic electronic component  
Components whose palladium metal-containing constituent is not subject to delamination and which exhibit very good dielectric properties are obtained by means of a method of manufacturing a ceramic...
5753176 Process for producing a voltage-dependent nonlinear resistor  
A process for producing a voltage-dependent nonlinear resistor that contains zinc oxide as a major component and that also contains a minor oxide component, is improved by the steps of adding an...
5707583 Method for preparing the zinc oxide base varistor  
In preparing a zinc oxide base varistor in the form of a sintered body which itself has a voltage-dependent nonlinear resistance, firing is done in an atmosphere containing at least 60% of oxygen...
5640136 Voltage-dependent nonlinear resistor  
The invention provides a voltage-dependent nonlinear resistor porcelain in the form of a ZnO system sintered body comprising zinc oxide as a major component and at least one of rare earth element...
5500996 Method for manufacturing a thermistor having a negative temperature coefficient in multi-layer technology  
In a method for manufacturing a thermistor having a negative temperature coefficient in multi-layer technology, a plurality of layers are produced of ceramic material by producing a suspension and...
5350551 Method of firing ceramic moldings containing a diffusible metallic oxide  
A ceramic firing method particularly suitable for the fabrication of metallic oxide varistor bodies containing a major proportion of zinc oxide and a minor proportion of antimony oxide. Should...
5296169 Method of producing varistor  
A varistor having a non-linear coefficient of at least 40 and improved stability for DC stress is produced by a method including a step of mixing ZnO powder with a solvent solution of Mn and Pb...
5264169 Surge stability improvement of zinc oxide varistor discs  
A method of manufacturing a varistor utilizes preselected amounts of ZnO which are combined with specified amounts of additives including B, Na, Bi 2 O 3 and BaO to form a variety of...
5234641 Method of making varistor or capacitor  
A method of manufacturing an improved visitor or capacitor, and the resultant improved varistor or capacitor is described. In accordance with the method the ceramic layers of the varistor are...
5143711 Process for manufacturing a precursor powder for use in making a varistor and a powder manufactured in this process  
A method for manufacturing a precursor powder for use in making a varistor is disclosed. This precursor powder is produced by preparing a homogeneous aqueous dispersion of metal oxides and/or metal...
5134540 Varistor or capacitor and method of making same  
A method of manufacturing an improved varistor or capacitor, and the resultant improved varistor or capacitor is described. In accordance with the method the ceramic layers of the varistor are...
5116542 Varistor material and method of producing same from zinc oxide and manganese oxide: controlled porosity and high non-linear coefficient  
A varistor material is disclosed which has a composition consisting essentially of 93-97 mole % of ZnO and 3-7 mole % of MnO, a non-linear coefficient α of at least 20 and such a bulk density as...
5076979 Process for production of varistor material  
A process for the production of a varistor material having a nonlinear index (α) of at least 20, which comprises adding a manganese compound to zinc oxide; heating the obtained mixture in the form...
5073302 Varistor material and process for production therefor  
A varistor material comprising two crystalline phases of ZnO and ZnMn 2 O 4 , wherein Zn and Mn are present at such a ratio that 3 to 7% by mol of ZnO is contained per 100% by mol of ZnO+MnO and...
5037594 Method for making varistor discs with increased high temperature stability  
A method for making a varistor disc with increased high temperature stability. The method includes the steps of formulating a mixture for the varistor disc, compacting the mixture to form a disc,...
5004573 Fabrication method for high voltage zinc oxide varistor  
A method of producing a zinc oxide varistor for high voltage which is a voltage-current non-linear type of resistor including zinc oxide as the major ingredient and bismuth oxide or manganese...
4996510 Metal oxide varistors and methods therefor  
A varistor comprises a primary varistor metal oxide, aluminum in an amount of about 1 to about 30 parts per million (ppm), about 0.1 to about 0.5 mole % bismuth, about 0.1 to about 1.5 mole %...
4981624 Method of producing a voltage-nonlinear resistor  
A method of producing a voltage nonlinear ZnO varistor in which seed grains of ZnO are produced by spray drying a slurry of ZnO particles and then sintering the dried slurry to form seed grains...
4811164 Monolithic capacitor-varistor  
A multilayer protective device is made by including a varistor composition (35) between a first plurality of interdigitated electrodes (30, 32) and a capacitor composition (36) between a second...
4692289 Method of manufacturing voltage-dependent resistor  
A voltage-dependent resistor having a low operational field strength with a ceramic sintered body on the basis of a polycrystalline alkaline earth metal titanate doped with a small quantity of a...
4681717 Process for the chemical preparation of high-field ZnO varistors  
Chemical preparation techniques involving co-precipitation of metals are used to provide micro-structural characteristics necessary in order to produce ZnO varistors and their precursors for high...
4594209 Process for the preparation of voltage non-linearity type resistors  
A voltage non-linearity type resistor and a process for the preparation of a voltage non-linearity type resistor wherein pre-sintering is effected at a temperature of no lower than 700° C. with a...
4579702 Zinc oxide voltage nonlinear resistors  
A zinc oxide voltage-nonlinear resistor is described. The resistor is produced by sintering a zinc oxide mixture containing 0.08 to 5.0 atomic % of at least one rare earth element, 0.1 to 10.0...
4575440 Process for the preparation of homogeneous metal oxide varistors  
A process for making a homogeneous metal oxide varistor powder is described. The ingredients desired in a varistor which are water and acid soluble and dissolved in water and acid respectfully to...
4541974 Semiconductive ceramic compositions with a nonlinear volt-ampere characteristic, and process for preparing coherent bodies of such compositions  
Ceramic materials suitable for use in varistors, enabling the same to function both as such and as capacitors. The ceramic compositions comprise a major proportion of SrTiO 3 , the balance being...
4516105 Metal oxide varistor with non-diffusable electrodes  
Disclosed is a metal oxide varistor which comprises; a sintered body containing (a) ZnO as a principal component, and (b), as auxiliary components, Bi, Co and Mn in amounts of 0.05.about.2 mole %,...
4474718 Method of fabricating non-linear voltage limiting device  
A non-linear voltage limiting device displaying a particular stability characteristic and designed to eliminate flashover failure across its circumferential edge is disclosed herein along with a...
4405508 Method of producing ceramic material for zinc oxide varistors  
Zinc oxide ceramic materials having pentavalent antimony therein for use in varistors are produced by adding Bi 6 Zn 4 Sb 2 O 12 , wherein antimony is present in its pentavalent form, to the...
4397773 Varistor with tetragonal antimony zinc oxide additive  
A low varistor voltage, low leakage metal oxide varistor and especially a zinc oxide varistor is provided by adding a few percent of tetragonal antimony zinc oxide to the varistor mixture prior to...
4377541 Process for preparing low voltage varistors  
Low voltage varistors having one or more recesses or dimples which reduces the thickness of the varistor in the recessed areas are provided by an improved process which comprises fitting a pressing...
4349496 Method for fabricating free-standing thick-film varistors  
A free-standing, thick-film varistor is fabricated by screen printing on a smooth aluminum oxide substrate an unfired standard varistor powder mixed with a suitable organic carrier and heating the...
4272411 Metal oxide varistor and method  
A composition is provided for use in forming varistor blocks containing mostly zinc oxide together with other impurities, including significant amounts of silicon carbide to a concentration of less...
4254070 Process for producing sintered body of ceramic composition for voltage non-linear resistor  
A sintered body of a ceramic composition for voltage non-linear resistor is produced by sintering an oxide semiconductor composition comprising a main component of zinc oxide and a minor component...
4243622 Method for manufacturing zinc oxide varistors having reduced voltage drift  
Zinc oxide varistors are thermally treated, after sintering, at temperatures between 400° C. and 800° C. in air for a period of one to ten hours. The thermal treatment apparently removes residual...
4165351 Method of manufacturing a metal oxide varistor  
Disclosed is a method of manufacturing a metal oxide varistor body. Conventional manufacturing techniques through sintering are utilized on any metal oxide varistor formulation which includes...
4142996 Method of making homogenous metal oxide varistor powders  
A method for manufacturing metal oxide varistors with an extremely homogeneous dispersion of metal oxides is disclosed. In accordance with one embodiment of the invention, nitrates of zinc and...
4046847 Process for improving the stability of sintered zinc oxide varistors  
A process for making overvoltage surge protection varistors of the zinc oxide type includes the steps of: A. sintering a varistor body at an elevated temperature of at least about 1100° C; then...
4035819 Method of making a zinc sulphide ceramic body and a zinc sulphide ceramic body made thereby  
A method of making a zinc sulphide ceramic body having a low electrical resistance characterized by sulphurizing a starting oxide material consisting essentially of zinc oxide and from 0.01 atomic...
Matches 1 - 50 out of 54 1 2 >