The present invention aims to provide a method for producing granules for ceramic production, the method having high productivity and making it possible to obtain a ceramic which, when produced by press molding the granules and firing the resulting press molded product, has physical properties kept from lowering. The present invention is characterized by including: a slurry preparation step of preparing a slurry including a mixture containing a powder of an inorganic compound, a binder, and a solvent; a granulation step of introducing the slurry into a spray drying device to form a granulated substance containing the inorganic compound; an exhaust step of exhausting an atmospheric gas within the spray drying device via a cyclone having a surface made of ceramic; and a step of mixing a fine powder, which has been recovered by the cyclone during the exhaust step, with the granulated substance obtained in the granulation step.

A ceramic electronic component includes a multilayer chip including a multilayer structure, which includes ceramic dielectric layers and internal electrode layers that are alternately stacked, and cover layers respectively disposed on top and bottom faces of the multilayer structure in a first direction in which the dielectric layers and the internal electrode layers are alternately stacked, wherein each of the cover layers includes a relatively high porous section and a first relatively less porous section having a pore ratio less than a pore ratio of the relatively high porous section, the relatively high porous section laterally spreading and spanning an entire length of the cover layer in a second direction orthogonal to the first direction, the pore ratio of the relatively high porous section being 1% or greater, the first relatively less porous section being interposed between the relatively high porous section and the multilayer structure.

A synthesis method for producing a refractory oxide-ceramic material of CaZrO.sub.3, in particular in the form of a refractory granular material that is preferably mechanically comminuted, in particular crushed and/or ground, as well as to a batch and a coarse ceramic, shaped or unshaped, refractory product containing at least one pre-synthesized refractory calcium zirconate-containing granular material.

A method for repairing a target member including a ceramic matrix composite reinforced by ceramic fiber includes: a removal step of removing at least a part of a surface of the target member; an arrangement step of arranging a green body for repair which includes the ceramic fiber on a portion where the surface is removed in the removal step; an impregnation step of impregnating at least the portion of the target member where the green body for repair is disposed with slurry; and a sintering step of sintering the target member on which the green body for repair is disposed, after the impregnation step.

Radiofrequency and other electronic devices can be formed from textured hexaferrite materials, such as Z-phase barium cobalt ferrite Ba.sub.3Co.sub.2Fe.sub.24O.sub.41 (Co.sub.2Z) having enhanced resonant frequency. The textured hexaferrite material can be formed by sintering fine grain hexaferrite powder at a lower temperature than conventional firing temperatures to inhibit reduction of iron. The textured hexaferrite material can be used in radiofrequency devices such as circulators or telecommunications systems.

The invention relates to a method for obtaining ceramic spheres from aluminosilicates, comprising: dry-milling a percentage of the aluminosilicates and wet-milling the remaining percentage; mixing the aluminosilicates obtained from the dry- and wet-milling processes with a binding additive; granulating same; drying the resulting granules; sieving the resulting granules in order to separate same into sub-groups; and sintering the granules obtained at a temperature between 800° and 1500° C.

A method of making a ceramic composite comprises forming a wet ceramic composition comprising a plurality of discrete ceramic components and a fluxing agent dissolved in a solvent. At least a portion of the solvent is removed from the wet ceramic composition to form a dried ceramic composition comprising the plurality of discrete ceramic components coated with the fluxing agent. The dried ceramic composition is sintered to form the ceramic composite, the sintering being carried out at a sinter temperature sufficient to fuse the discrete ceramic components at bridging sites formed where two or more of the discrete ceramic components coated with fluxing agent are in physical contact.

The invention discloses a biologically active zirconia denture has a gradient structure, the gradient structure consisting of a biomimetic nano-gradient biologically active outer surface layer, the nano-gradient outer surface layer is composed of zirconia nanocrystals and a plurality of nanopores penetrating gradiently through the layer, a micron-gradient biocompatible inner layer, the micron-gradient inner surface layer is composed of zirconia microncrystals and a plurality of micronpores penetrating gradiently through the layer, a dense micron-gradient biocompatible matrix structure, a uniform gradient transition is formed at the interface between the nano-gradient outer layer and the micron-gradient inner layer, and the micron-gradient inner layer and the matrix. The invention has the advantages of high strength, high toughness, low friction coefficient, low abrasion to the teeth, good biocompatibility and biological activity.

A positive electrode active material for a non-aqueous electrolyte secondary battery includes secondary particles of a lithium transition metal complex oxide as a main component. The main component is represented by a formula: Li.sub.t(Ni.sub.1-xCo.sub.x).sub.1-yMn.sub.yB.sub.αP.sub.βS.sub.γO.sub.2, where t, x, y, α, β, and γ satisfy inequalities of 0≤x≤1, 0.00≤y≤0.50, (1−x).Math.(1−y)≥y, 0.000≤α≤0.020, 0.000≤β=0.030, 0.000≤γ≤0.030, and 1+3α+3β+2γ≤t≤1.30, and satisfy at least one of inequalities of 0.002≤α, 0.006≤β, and 0.004≤γ. The secondary particles exhibit a pore distribution, where a pore volume Vp(1) having a pore diameter of not less than 0.01 μm and not more than 0.15 μm satisfies an inequality of 0.035 cm.sup.3/g≤Vp(1) and where a pore volume Vp(2) having a pore diameter of not less than 0.01 μm and not more than 10 μm satisfies an inequality of Vp(2)≤0.450 cm.sup.3/g.

The present invention provides a method for producing a powder containing zirconia particles and a fluorescent agent that enables easy production of a zirconia sintered body having both high translucency and high strength despite containing a fluorescent agent. The present invention relates to a method for producing a zirconia particle- and fluorescent agent-containing powder, comprising: a mixing step of mixing a zirconia particle-containing slurry and a liquid-state fluorescent agent; and a drying step of drying the slurry containing the zirconia particles and the fluorescent agent. Preferably, the fluorescent agent comprises a metallic element, and the powder comprises the fluorescent agent in an amount of 0.001 to 1 mass % in terms of an oxide of the metallic element relative to a mass of zirconia. Preferably, the zirconia particles have an average primary particle diameter of 30 nm or less. Preferably, the zirconia particles comprises 2.0 to 9.0 mol % yttria.