Abstract: A dielectric ceramic composition and a monolithic ceramic capacitor using the composition are provided. The dielectric ceramic composition includes: barium titanate; at least one rare earth oxide selected from terbium oxide, dysprosium oxide, holmium oxide, erbium oxide and ytterbium oxide; manganese oxide and nickel oxide; and magnesium oxide in an amount of from 0.5 to 3.0 mols in terms of MgO, and silicon oxide in an amount of from 0.2 to 5.0 mols in terms of SiO.sub.2, relative to 100 mols of the essential component having the following compositional formula:(1--.alpha.--.beta.){BaO}.sub.m TiO.sub.2 +.alpha.Re.sub.2 O.sub.3 +.beta.(Mn.sub.1-x Ni.sub.x)Owhere Re.sub.2 O.sub.3 is at least one selected from Tb.sub.2 O.sub.3, Dy.sub.2 O.sub.3, Ho.sub.2 O.sub.3, Er.sub.2 O.sub.3 and Yb.sub.2 O.sub.3 ; and.alpha., .beta., m and x are as follows:0.0025.ltoreq..alpha..ltoreq.0.0200.0025.ltoreq..beta..ltoreq.0.04.beta./.alpha..ltoreq.40.ltoreq.x<1.01.000<m.ltoreq.1.035.

Abstract: Disclosed is a monolithic ceramic capacitor comprising dielectric ceramic layers made from a ceramic composition, which comprises an essential component of (1-.alpha.-.beta.){BaO}.sub.m.TiO.sub.2 +.alpha.{(1-x)M.sub.2 O.sub.3 +xRe.sub.2 O.sub.3 }+.beta.(Mn.sub.1-y-z Ni.sub.y Co.sub.z)O (0.0025.ltoreq..alpha..ltoreq.0.025; 0.0025.ltoreq..beta..ltoreq.0.05; .beta./.alpha..ltoreq.4; 0<x.ltoreq.0.50; 0.ltoreq.y<1.0; 0.ltoreq.z<1.0; 0.ltoreq.y+z<1.0; 1.000<m.ltoreq.1.035) and from 0.5 to mols, relative to 100 mols of the essential component, of a side component MgO, and contains from 0.2 to 3.0 parts by weight, relative to 100 parts by weight of said components, of an oxide of the type of Li.sub.2 O--(Si,Ti)O.sub.2 --Al.sub.2 O.sub.3 --ZrO.sub.2. The capacitor can be small-sized while having large capacity. It can be produced even through baking in atmospheres having a low oxygen partial pressure without producing semiconductors.

Abstract: Disclosed herein is a dielectric ceramics composition which comprises 100 moles of a primary component being a barium titanate (containing less than about 0.02 wt % of alkali metal oxide as an impurity) as expressed by the compositional formula:(1-.alpha.-.beta.-.gamma.){BaO}.sub.m.TiO.sub.2 +.alpha.M.sub.2 O.sub.3 +.beta.Re.sub.2 O.sub.3 +.gamma.(Mn.sub.1-x-y Ni.sub.x Co.sub.y)O(where M.sub.2 O.sub.3 denotes Sc.sub.2 O.sub.3 or Y.sub.2 O.sub.3 or both, Re.sub.2 O.sub.3 denotes Sm.sub.2 O.sub.3 or Eu.sub.2 O.sub.3 or both, 0.0025.ltoreq..alpha.+.beta..ltoreq.0.025, 0<.beta..ltoreq.0.0075, 0.0025.ltoreq..gamma..ltoreq.0.05, .gamma./(.alpha.+.beta.).ltoreq.4, 0.ltoreq.x<1.0, 0.ltoreq.y<1.0, 0.ltoreq.x+y<1.0, and 1.0000<m.ltoreq.1.035; from about 0.5-5 moles of MgO; and, about 0.2-3 pbw per 100 pbw of primary component and MgO, said auxiliary component being an oxide represented by Li.sub.2 O--(Si,Ti)O.sub.2 --Al.sub.2 O.sub.3 --ZrO.sub.2.

Abstract: The present invention provides a nonreducing dielectric ceramic including a sintered compact composed of a plurality of particles expressed by a maximum diameter of about 0.5 .mu.m and an average diameter of about 0.1 to 0.3 .mu.m, each of the plurality of particles having a uniform composition and a uniform crystal system, and individual particles having the same composition and crystal system. A compact monolithic electronic part with high-reliability can be realized by using such ceramic.

Abstract: Disclosed is a monolithic ceramic capacitor comprising dielectric ceramic layers made from a material which comprises an essential component of (1-.alpha.-.beta.){BaO}.sub.m.TiO.sub.2 +.alpha.Re.sub.2 O.sub.3 +.beta.(Mn.sub.1-x-y Ni.sub.x Co.sub.y)O (0.0025.ltoreq..alpha..ltoreq.0.025; 0.0025.ltoreq..beta..ltoreq.0.05; .beta./.alpha..ltoreq.4; 0.ltoreq.x<1.0; 0.ltoreq.y<1.0; 0.ltoreq.x+y<1.0; 1.000<m.ltoreq.1.035) and from about 0.5 to 5.0 mols, relative to 100 mols of the essential component, of a side component MgO, and containing from about 0.2 to 3.0 parts by weight, relative to 100 parts by weight of said components, of an oxide of the type of SiO.sub.2 --TiO.sub.2 --MO. The capacitor is low-priced and can be small-sized, while having large-capacity. It has a dielectric constant of 3000 or more, and has a high insulation resistance of 6000 M.OMEGA...mu.F or more and 2000 M.OMEGA...mu.F or more at room temperature and 125.degree. C., respectively.

Abstract: Disclosed is a monolithic ceramic capacitor comprising dielectric ceramic layers made from a material which comprises an essential component of (1-.alpha.-.beta.){BaO}.sub.m .cndot.TiO.sub.2 +.alpha.Re.sub.2 O.sub.3 30 .beta.(Mn.sub.1-x-y Ni.sub.x Co.sub.y)O (0.0025.ltoreq..alpha..ltoreq.0.025; 0.0025.ltoreq..beta..ltoreq.0.05; .beta./.alpha..ltoreq.4; 0.ltoreq.x<1.0; 0.ltoreq.y<1.0; 0.ltoreq.x+y<1.0; 1.000<m.ltoreq.1.035) and from about 0.1 to 3.0 mols, relative to 100 mols of the essential component, of a side component MgO, and contains from about 0.2 to 3.0 parts by weight, relative to 100 parts by weight of said components, of an oxide of the type of Li.sub.2 O-B.sub.2 O.sub.3 -(Si,Ti)O.sub.2. The capacitor is low-priced and can be small-sized, while having large-capacity. It has a dielectric constant of 3000 or more, and has a high insulating resistance of 6000 M.OMEGA..cndot..mu.F or more and 2000 M.OMEGA..cndot..mu.F or more at 2 KV/mm and at room temperature and 125.degree. C.

Abstract: A dielectric ceramic composition composed mainly of lead magnesium-niobate ?Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 !, strontium titanate ?SrTiO.sub.3 !, and lead titanate ?PbTiO.sub.3 !, characterized in that the molar ratio of said three major components is defined by?Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 !.sub.x .multidot.?SrTiO.sub.3 !.sub.y .multidot.?PbTiO.sub.3 !.sub.z(where x+y+z=100 parts by mole, and each value of x, y, and z is on lines or within the area enclosed by lines passing through four points A (72, 10, 18), B (76, 5, 19), C (57, 5, 38), and D (48, 20, 32) in a triangular composition diagrams), and said three major components are supplemented by (Pb.sub.1-x Ba.sub.x) (Cu.sub.1/2 W.sub.1/2)O.sub.3 (where 0.ltoreq.x.ltoreq.1) in an amount less than about 5 parts by mole (excluding 0 part by mole) for 100 parts by mole of said major components. This dielectric ceramic composition can be sintered at low temperatures and has a high permittivity and a high mechanical strength.

Abstract: Disclosed is a monolithic ceramic capacitor comprising dielectric ceramic layers made from a ceramic composition, which comprises an essential component of (1-.alpha.-.beta.) {BaO}.sub.m .multidot.TiO.sub.2 +.alpha.{(1-x)M.sub.2 O.sub.3 +xRe.sub.2 O.sub.3 }+.beta.(Mn.sub.1-y-z Ni.sub.y Co.sub.z)O (0.0025.ltoreq..alpha..ltoreq.0.025; 0.0025.ltoreq..beta..ltoreq.0.05; .beta./.alpha..ltoreq.4; 0<x.ltoreq.0.50; 0.ltoreq.y<1.0; 0.ltoreq.z<1.0; 0.ltoreq.y+z<1.0; 1.000<m.ltoreq.1.035) and from 0.5 to mols, relative to 100 mols of the essential component, of a side component MgO, and contains from 0.2 to 3.0 parts by weight, relative to 100 parts by weight of said components, of an oxide of the type of Li.sub.2 O--(Si,Ti)O.sub.2 --Al.sub.2 O.sub.3 --ZrO.sub.2. The capacitor can be small-sized while having large capacity. It can be produced even through baking in atmospheres having a low oxygen partial pressure without producing semiconductors.

Abstract: A plurality of dielectric ceramic sheets having inner electrodes thereon are laminated and sintered. The ceramic sheets are made of a non-reducing dielectric material, and the inner electrodes are made of a base metal or a base metal alloy. After a binder removing step, the laminate is sintered in a mixed gas which contains either one or both of carbon dioxide with a purity of 99.9% or more and carbon monoxide with a purity of 99.9% or more as its main constituent and further contains hydrogen and oxygen with their densities regulated.

Abstract: This invention is directed to provide a non-reduced dielectric ceramic composition, which comprises a main component comprising BaTiO.sub.3, at least one rare earth metal oxide (Re.sub.2 O.sub.3) selected from the group consisting of Tb.sub.2 O.sub.3, Dy.sub.2 O.sub.3, Ho.sub.2 O.sub.3, and Er.sub.2 O.sub.3, and Co.sub.2 O.sub.3, where such constituents are contained at a predetermined formulation in the main component, an sub-component comprising BaO, MnO, MgO, and at least one compound selected from the group of NiO and Al.sub.2 O.sub.3, and an oxide glass mainly containing Li.sub.2 O--(Si.sub.x Ti.sub.1-x)O.sub.2 --M wherein M represents at least one member selected from the group consisting of Al.sub.2 O.sub.3 and ZrO.sub.2, wherein the main component, the sub-component, and the oxide glass are contained in described amounts. The composition is used as dielectric materials, such as monolithic ceramic capacitors, using base metals such as nickel as an internal electrode material.

Abstract: A powder of magnetic oxides given by the general formula:MeFe.sub.2 O.sub.4where Me is at least one element of divalent metal element selected from the group consisting of Ni, Zn, Cu, Mn and Co, is produced by a method comprising the steps of preparing a magnetic oxide precursor composed of .alpha.-FeOOH and a complex carbonate compound of at least one divalent metal element deposited on surfaces of particles of .alpha.-FeOOH; and then treating the resultant magnetic oxide precursor with heat.

Abstract: The present invention relates to a dielectric ceramic composition, comprising from 97.5 to 99.95% by weight of{100-(a+b+c+d)}BaTiO.sub.3 +aZnO+b(2Bi.sub.2 O.sub.3.3AO.sub.2)+cTa.sub.2 O.sub.5 +dRe.sub.2 O.sub.3as main component and from 0.05 to 2.5% by weight of glass mainly comprising SiO.sub.2, and possibly also containing from 0.01 to 0.5% by weight of at least one oxides of Cr, Mn, Fe, Co, and/or Ni. A represents Zr or Sn; Re represents at least one of La, Pr, Nd, Sm, Dy and Er; and {100-(a+b+c+d)}, a, b, c, and d represent molar percent which satisfy the following relationships:______________________________________ 0.5 .ltoreq. a .ltoreq. 4.5 0.5 .ltoreq. b .ltoreq. 4.5 0.5 .ltoreq. c .ltoreq. 4.5 0.5 .ltoreq. d .ltoreq. 5.5.

Abstract: Powder of ceramic materials is produced by mixing a powder of a basic ceramic composition, a solvent and a surfactant to prepare a slurry, adding at least one unsaturated fatty acid salt containing an additive metal element to the resultant slurry, polymerizing the at least one unsaturated fatty acid salt with a polymerization initiator to form a polymer of at least one unsaturated fatty acid salt, drying the resultant slurry to form a layer of the resultant polymer on particle surfaces of the basic ceramic composition, and then calcining the resultant coated powder of the basic ceramic composition.

Abstract: A multilayer ceramic capacitor and a process for producing the same, which comprises dielectric ceramic layers, internal electrodes disposed between the dielectric ceramic layers, and an external electrode connected to the internal electrodes, the dielectric ceramic layers comprising barium titanate, a bismuth compound, and an anti-reducing agent, the internal electrodes comprising nickel or a nickel alloy. The anti-reducing agent is represented by the general formula:.alpha.MOx+.beta.RO+B.sub.2 O+(100-.alpha.-.beta.-.gamma.) SiO.sub.2 wherein MOx represents at least one members selected from the group consisting of MnO.sub.2, Li.sub.2 O, and ZnO; R represents at least one member selected from the group consisting of Mg, Sr, Ca, and Ba; and .alpha., .beta., and .gamma., each indicating a respective percentage by mole, represent numbers in the ranges of 5<.alpha.<20, 10<.beta.<60, and 20<.gamma.<35, respectively.

Abstract: A thin film of strontium titanate is formed on a substrate by immersing a substrate in an aqueous solution containing strontium ions and titanium alkoxide. The aqueous solution may contain not more than 20 vol % of one or more alkanolamines expressed by the general formula:HO(C.sub.n H.sub.2n).sub.m NH.sub.3-mwith n=not more than 10, and m=1, 2 or 3.

Abstract: A non-reducible dielectric ceramic composition consists essentially of a main component and at least one oxide selected from the group consisting of oxides of Mn, Fe, Cr, Co and Ni. The main component has a composition of the general formula: {(Ba.sub.1-o-p-q-r Sr.sub.o Ca.sub.p R1.sub.q R2.sub.r)O.sub.1+q/2+r/2 }.sub.m (Ti.sub.1-x-y Zr.sub.x Hf.sub.y)O.sub.2, where R1 is at least one element selected from the group consisting of La, Ce, Nd, Pr and Sm, R2 is at least one element selected from the group consisting of Dy, Ho, Er, Yb and Y, and o, p, q, r, x, y and m meet the following conditions: 0<o.ltoreq.0.32, 0.ltoreq.p.ltoreq.0.20, 0<q.ltoreq.0.02, 0<r.ltoreq.0.02, 0<x.ltoreq.0.24, 0<y.ltoreq.0.16, 1.00.ltoreq.m.ltoreq.1.03, and 0<q+r.ltoreq.0.03. The content of additive is 0.02 to 2.0 moles per 100 moles of the main component when calculated in terms of respective oxides, MnO, Fe.sub.2 O.sub.3, Cr.sub.2 O.sub.3, CoO and NiO.

Abstract: A dielectric ceramic composition consists essentially of a main component of a four component system, Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 --PbTiO.sub.3 --Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 --Pb(Zn.sub.1/2 W.sub.1/2)O.sub.3, of which a part of Pb is replaced with at least one substituent selected from the group consisting of Ba, Ca and Sr; and a secondary component selected from the group consisting of w, Zn and Mg. The secondary component is incorporated in the main component in an amount of 0.05 to 10.0 parts by weight per 100 parts by weight of the main component in terms of each oxide, WO.sub.3, ZnO or MgO. The main component consists essentially of 4.0 to 93.0 mol % of Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3, 1.5 to 35.0 mol % of PbTiO.sub.3, 1.5 to 51.0 mol % of Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3, and 1.0 to 34.0 mol % of Pb(Zn.sub.1/2 W.sub.1/2)O.sub.3, the amount of at least one substituent for Pb being 0.1 to 10 mol %.

Abstract: The present invention is directed to a dielectric ceramic composition composed of, 97.5 to 99.95 wt. % of main component represented by, {100-(a+b+c+d)} (Ba.sub.100-x Pb.sub.x) TiO.sub.3 +aZnO+bBi.sub.2 O.sub.3 +cNb.sub.2 O.sub.5 +dRe.sub.2 O.sub.3 (0.5.ltoreq.a.ltoreq.4.5, 0.5.ltoreq.b.ltoreq.4.5, 0.5.ltoreq.c.ltoreq.4.5, 0.5.ltoreq.d.ltoreq.5.5 and 0<x.ltoreq.6.0, and 0.05 to 2.5 wt. % of first by-component consisting of glass whose main component is SiO.sub.2. Also, the present invention is directed to a dielectric ceramic composition composed of main component represented by, {100-(a+b+c+d+e)} BaTiO.sub.3 +aZnO+bBi.sub.2 O.sub.3 +cMeO.sub.2 +dNb.sub.2 O.sub.5 +eRe.sub.2 O.sub.3 (0.5.ltoreq.a.ltoreq.4.5, 2.0.ltoreq.b.ltoreq.6.0, 0.5.ltoreq.c.ltoreq.6.5, 0.5.ltoreq.d.ltoreq.4.5 and 0.5.ltoreq.e.ltoreq.5.5), and first by-component. Furthermore, the present invention is directed to a dielectric ceramic composition composed of main component represented by, (100-(a+b+c+d+e+f)} BaTiO.sub.3 +aZnO +bBi.sub.

Abstract: A nonreducible dielectric ceramic composition consists essentially of: a primary component consisting essentially of 92.0 to 99.4 mol % of BaTiO.sub.3, 0.3 to 4.0 mol % of at least one of rare earth element, expressed by the general formula: Re.sub.2 O.sub.3, where Re is at least one rare earth element selected from the group consisting of Tb, Dy, Ho and Er, and 0.3 to 4.0 mol % of Co.sub.2 O.sub.3 ; a secondary component consisting essentially of BaO, MnO, MgO, and BaZrO.sub.3, the content of the secondary component being, per 100 moles of the primary component, 0.2 to 4.0 moles for BaO, 0.2 to 3.0 moles for MnO, 0.5 to 5 moles for MgO, and 0.5 to 4.0 moles for BaZrO.sub.3 ; and a vitreous component of a BaO--SrO--Li.sub.2 O--SiO.sub.2 system, the content of the vitreous component being 0.5 to 2.5 parts by weight per 100 parts by weight of the sum of the primary and secondary components.

Abstract: A thin film of barium titanate is formed on a substrate by immersing the substrate in an aqueous solution containing barium ions and titanium alkoxide. The aqueous solution may contain not more than 20 vol % of one or more alkanolamines expressed by the general formula:HO(C.sub.n H.sub.2n)mNH.sub.3-mwhere n is not more than 10, and m=1, 2 or 3.