摘要:
A method of making dense dielectrics layers via chemical solution deposition by adding inorganic glass fluxed material to high dielectric constant compositions, depositing the resultant mixture onto a substrate and annealing the substrate at temperatures between the softening point of the inorganic glass flux and the melting point of the substrate. A method of making a capacitor comprising a dense dielectric layer.
摘要:
A dielectric ceramic composition in a multilayer ceramic capacitor with a composition of formula: {[(CaO)t(SrO)1-t]m[(ZrO2)v(TiO2)1-v]}1-s-xAsEx wherein: A is a transition metal oxide; E is an oxide of an element selected from the group consisting of Ge, Si, Ga and combinations thereof; m is 0.98 to 1.02; t is 0.50 to 0.90; v is 0.8 to 1.0; s and x are selected from the group consisting of: a) 0≦x≦0.08, 0.0001≦s≦0.043 and x≧1.86s; and b) 0≦x≦0.0533, 0.0001≦s≦0.08 and x≦0.667s.
摘要翻译:一种具有下列组成的多层陶瓷电容器中的介电陶瓷组合物:<?in-line-formula description =“In-line Formulas”end =“lead”?> {[(CaO)t(SrO)1-t] m [(ZrO 2)v(TiO 2)1-v]} 1-s-x AsEx <?in-line-formula description =“In-line Formulas”end =“tail”?>其中:A是过渡金属氧化物; E是选自Ge,Si,Ga及其组合的元素的氧化物; m为0.98〜1.02; t为0.50〜0.90; v为0.8〜1.0; s和x选自:a)0 <= x <= 0.08,0 0.0001 <= s <= 0.043和x> = 1.86s; 和b)0 <= x <= 0.0533,0.0001 <= s <= 0.08和x <= 0.667s。
摘要:
The present invention is directed to an article comprising a dielectric layer formed from any solution composition that can form barium titanate during firing and containing manganese in an amount between 0.002 and 0.05 atom percent of the solution composition, wherein the dielectric layer has been formed on metal foil and fired in a reducing atmosphere.
摘要:
A ceramic capacitor is disclosed. The capacitor comprises a plurality of base metal inner electrode layers, a plurality of ceramic dielectric layers between the inner electrode layers, and external electrodes in electrical conductivity with the inner electrode layers. At least one secondary component having an intentionally added chemistry is dispersed in the inner electrode layers and/or the dielectric layers. The chemistry evolves an oxidizing species in a controlled manner, such that it offsets localized highly reducing atmospheres that are present when the capacitor is fired in a reducing atmosphere, thereby promoting enhanced electrode connectivity in thin layer base metal multilayer capacitors.
摘要:
A composition consisting essentially of 60.0-70.0 mol % TiO.sub.2, 14.3-20.0 mol % Nd.sub.2 O.sub.3, 11.0-16.7 mol % BaO, 1.0-8.0 mol % ZrO.sub.2 and 0.05-0.30 mol % CeO.sub.2. This composition is useful for forming densified ceramic dielectric bodies having a dielectric constant of at least 65 and which meet COG specifications, and multilayer capacitors that contain such dielectric bodies.
摘要翻译:基本上由60.0-70.0mol%TiO 2,14.3-20.0mol%Nd 2 O 3,11.0-16.7mol%BaO,1.0-8.0mol%ZrO 2和0.05-0.30mol%CeO 2组成的组合物。 该组合物可用于形成具有至少65的介电常数且满足COG规格的致密陶瓷介电体,以及含有这种介电体的多层电容器。
摘要:
A low firing dielectric composition containing an admixture of finely divided particles of manganese doped-lead iron-tungsten niobate, barium titanate and optionally an inorganic sintering aid, dispersed in an organic medium. This composition is useful for forming capacitors.
摘要:
An improved ceramic dielectric composition comprising a chemically homogeneous distribution of a mixture of additives on the surface of particles of ceramic powder, and to a method for enhancing the dielectric properties and sinterability of such compositions at low firing temperatures.
摘要:
A dielectric composition is claimed consisting essentially of a donor- and acceptor-doped BaTiO.sub.3 having an intergranular phase of flux containing both glass-forming and glass-modifying ions. that can be co-fired in a low oxygen-containing atmosphere for the manufacture of multilayer capacitors having copper internal electrodes.
摘要:
The ceramic body of a monolithic ceramic capacitor consists of a granular barium titanate phase and a relatively low temperature melting intergranular phase. The body is capable of exhibiting a very high dielectric constant, e.g., over 5000, a Curie temperature of near 25.degree. C., and may be fired to maturity at 1150.degree. C. or lower and contain low cost buried electrodes. These properties obtain from a narrow range of compositions for which charge balance and large/small cation stoichiometry in the total formulation are found to be very critical. Cd, Zn, Cu, Li and Na are found to enter the grains as large acceptor cations on Ba sites and may be charge compensated by the small donor cations of charge +5, Bi, Sb, Nb and Ta or by the small donor cations of charge +6, W and Mo, on the Ti sites. At least 0.3 mole percent of glass-former cations are desirable for establishing a low melting flux during sintering but more than 2.2 mole percent glass-formers tends to reduce the dielectric constant.
摘要:
A monolithic ceramic capacitor having base metal electrodes is described that meets the standard TCC limits of .+-. 15% from -55.degree. C to 125.degree. C. The ceramic includes small quantities of acceptor dopants, particularly manganese added to barium titanate and an alkali-earth-metal-zirconate. When fired from 1250.degree. C to 1400.degree. C in a partial oxygen atmosphere of 10.sup..sup.-7 to 10.sup..sup.-9 atmospheres of oxygen, a liquid phase sintering occurs during which the titanate-zirconate grains do not grow and there is formed a concentration gradient of the zirconate near the grain surfaces while a liquid manganese titanate forms a second and immiscible phase in the grain boundary regions.