An alumina crystal particle(s), a zirconia crystal particle(s), Ti, Mg, and Si are included, where, when Ti is converted into TiO2, Mg is converted into MgO, and Si is converted into SiO2, a total content of Ti, Mg, and Si is 1.4% by mass or greater, when zirconia that composes the zirconia crystal particle(s) is denoted by ZrO2, a content of a rare-earth element relative to ZrO2 in the zirconia crystal particle(s) is 2 mol % or less in an oxide equivalent thereof, the zirconia crystal particle(s) include(s) at least one of a separate particle(s) with a maximum length of 1 μm or greater and an aggregated particle(s) with a maximum length of 1 μm or greater, and a total of ratios of the separate particle(s) with a maximum length of 1 μm or greater and the aggregated particle(s) with a maximum length of 1 μm or greater is 50% by volume or greater of a whole of the zirconia crystal particle(s).

Disclosed herein are embodiments of modified z-type hexagonal ferrite materials having improved properties that are advantageous for radiofrequency applications, in particular high frequency ranges for antennas and other devices. Atomic substitution of strontium, aluminum, potassium, and trivalent ions can be used to replace certain atoms in the ferrite crystal structure to improve loss factor at high frequencies.

Disclosed are ceramic bodies comprised of composite cordierite-mullite-aluminum magnesium titanate (CMAT) ceramic compositions having high cordierite-to-mullite ratio and methods for the manufacture of same.

A guide member for a fishing line including an alumina ceramic including Ti and Al, a content of Ti being not less than 0.5 mass % in terms of TiO.sub.2, a content of Al being not less than 92 mass % in terms of Al.sub.2O.sub.3, and a main phase of the alumina ceramic being alumina crystals, wherein a content ratio of aluminas crystal with an aspect ratio of not less than 2 within the alumina crystals is not less than 15%.

A novel metal oxide or a novel sputtering target is provided. A sputtering target includes a conductive material and an insulating material. The insulating material includes an oxide, a nitride, or an oxynitride including an element M1. The element M1 is one or more kinds of elements selected from Al, Ga, Si, Mg, Zr, Be, and B. The conductive material includes an oxide, a nitride, or an oxynitride including indium and zinc. A metal oxide film is deposited using the sputtering target in which the conductive material and the insulating material are separated from each other.

A method for manufacturing a zirconia sintered body includes molding a powder composition that has a yttria content of more than 3% by mole and 5.2% by mole or less and that contains a first zirconia powder having a yttria content of 2% by mole or more and 4% by mole or less and a second zirconia powder having a yttria content of more than 4% by mole and 6% by mole or less to obtain a green body, and sintering the green body to obtain a sintered body.

According to the present invention, a dielectric ceramic composition, which can be fired in a reducing atmosphere, has a high dielectric constant, has an electrostatic capacity exhibiting little change, when used as a dielectric layer of a ceramic electronic component such as a laminated ceramic capacitor even under a condition of 150 to 200° C., and has small dielectric losses at 25° C. and 200° C., can be provided.

An oxide sintered body has metal elements of In, Ga, Zn, and Sn and contains Ga.sub.2In.sub.6Sn.sub.2O.sub.16, ZnGa.sub.2O.sub.4, and InGaZnO.sub.4. The contents of In, Ga, Zn, and Sn in the oxide sintered body satisfy the relations [Ga]≥37 atomic %, [Sn]≤15 atomic %, and [Ga]/([In]+[Zn])≥0.7, where [In], [Ga], [Zn], and [Sn] represent ratios (atomic %) of In, Ga, Zn, and Sn with respect to all metal elements contained in the oxide sintered body, respectively.

A composite ceramic with improved mechanical performance and a preparation method therefor. The composite ceramic comprises fluorescent powder, a ceramic matrix, and an optional sintering aid. The weight ratio of the fluorescent powder to the ceramic matrix is from 3:17 to 9:1, and the relative density of the composite ceramic is greater than 95%. The preparation method comprises using core shell-structured coated fluorescent powder as a raw material, and ball-milling and sintering the raw material to obtain the composite ceramic.

A method of manufacturing a chamber component for a processing chamber comprises forming a green body using a Y.sub.2O.sub.3—ZrO.sub.2 powder consisting essentially of 55-65 mol % Y.sub.2O.sub.3 and 35-45 mol % ZrO.sub.2, and sintering the green body to produce a sintered ceramic body consisting essentially of one or more phase of Y.sub.2O.sub.3—ZrO.sub.2, the sintered ceramic body consisting essentially of 55-65 mol % Y.sub.2O.sub.3 and 35-45 mol % ZrO.sub.2.