A ceramic circuit board includes: a ceramic board; and an internal conductor disposed in the ceramic board, in which the ceramic board contains glass, a willemite filler, and an alumina filler, and an average particle diameter of the willemite filler is larger than an average particle diameter of the alumina filler.

A method for producing a ceramic matrix composite is provided with: weaving a fabric from fibers of SiC; infiltrating SiC into pores in the fabric by vapor phase infiltration; executing solid phase infiltration by immersing the fabric after the vapor phase infiltration in an immersion liquid including a solvent, a SiC powder and a glass powder to infiltrate SiC and glass into the fabric; and executing liquid phase infiltration by immersing the fabric after the solid phase infiltration in an immersion liquid including a solvent and an organic silicon polymer and calcine the immersed fabric to infiltrate SiC into the fabric.

A piezoelectric ceramic plate which is slightly deformed by firing, includes a plate-shaped substrate, and an electronic component. The piezoelectric ceramic plate has a pair of main surfaces, a pair of opposing first side surfaces, and a pair of opposing second side surfaces. The pair of first side surfaces are baked surfaces, and the distance between the pair of first side surfaces measured at the center in the longitudinal direction is denoted by Lc and the distance between the pair of first side surfaces measured at ends in the longitudinal direction is denoted by Le. The ratio of the difference L between Le and Lc to Lc (L/Lc) is 1.0% or less. The piezoelectric ceramic plate is suitably used as a piezoelectric ceramic plate having an area of each of the main surfaces of 360 mm.sup.2 or more and a thickness of 150 m or less.

A ceramic liner can include a monolithic body having a surface portion and a bulk portion. The surface portion can have a thickness less than the total thickness of the monolithic body. The monolithic body can include an amorphous phase. The amorphous phase can be discontinuous. At least one member of the discontinuous phase can be embedded in the surface portion. The bulk portion can be substantially free of the amorphous phase. A method of forming a ceramic liner can include providing a furnace with a coating and a bulk material of the ceramic liner and heating the bulk material and the coating. In an embodiment, a coated lining form can be used to provide the coating. In a particular embodiment, the coating can be transferred to the bulk material from the coated lining form.

A low K value, high Q value, low firing dielectric material and method of forming a fired dielectric material. The dielectric material can be fired below 950 C. or below 1100 C., has a K value of less than about 8 at 10-30 GHz and a Q value of greater than 500 or greater than 1000 at 10-30 GHz. The dielectric material includes, before firing a solids portion including 10-95 wt % or 10-99 wt % silica powder and 5-90 wt % or 1-90 wt % glass component. The glass component includes 50-90 mole % SiO.sub.2, 5-35 mole % or 0.1-35 mole % B.sub.2O.sub.3, 0.1-10 mole % or 0.1-25 mole % Al.sub.2O.sub.3, 0.1-10 mole % K.sub.2O, 0.1-10 mole % Na.sub.2O, 0.1-20 mole % Li.sub.2O, 0.1-30 mole % F. The total amount of Li.sub.2O+Na.sub.2O+K.sub.2O is 0.1-30 mole % of the glass component. The silica powder can be amorphous or crystalline.

A pre-ceramic support structure for additive manufacturing, that upon thermal processing, is soluble in various solvents.

The present specification relates to an electrolyte of a solid oxide fuel cell, a solid oxide fuel cell including the same, a composition for the electrolyte, and a method for preparing the electrolyte.

A composite powder of the present invention includes a glass powder and a ceramic powder, wherein a content of the glass powder is from 30 vol % to 60 vol %, wherein a content of the ceramic powder is from 40 vol % to 70 vol %, wherein the glass powder includes as a glass composition, in terms of mass %, 10% to 30% of SiO.sub.2, more than 20% to 40% of B.sub.2O.sub.3, 20% to 40% of SrO+BaO, 0% to 10% of Al.sub.2O.sub.3, and 0% to 15% of ZnO, and wherein the composite powder is used for a light reflective substrate.

A multilayer ceramic electronic device includes internal electrodes, dielectric layers each of which includes a main component, a first subcomponent, a second subcomponent, and a third sub component. The main component includes titanium and includes at least one of barium or calcium. A molar ratio of a sum of barium and calcium to titanium is 1.045 or more and 1.100 or less. The first sub component includes 3 mol or more and 6 mol or less of a rare earth element, with respect to 100 mol of titanium in the dielectric layers. The second sub component includes 3 mol or more and 7 mol or less of manganese, with respect to 100 mol of titanium in the dielectric layers. The third sub component includes 0.6 weight % or more and 2.4 weight % or less of borosilicate glass with respect to each of the plurality of dielectric layers.

A low-temperature co-fired microwave dielectric ceramic material includes: (a) 85 wt % to 99 wt % ceramic material comprising Mg.sub.2SiO.sub.4, Ca.sub.2SiO.sub.4, CaTiO.sub.3, and CaZrO.sub.3, wherein a weight ratio of Mg.sub.2SiO.sub.4 relative to Ca.sub.2SiO.sub.4 is of (1-x): x, a weight ratio of CaTiO.sub.3 relative to CaZrO.sub.3 is of y:z, and a weight ratio of entities of Mg.sub.2SiO.sub.4 and Ca.sub.2SiO.sub.4 relative to CaTiO.sub.3 is of (1-y-z):y, 0.2x0.7, 0.05y0.2, 0.05z0.4; and (b) 1 wt % to 15 wt % glass material composed of Li.sub.2O, BaO, SrO, CaO, B.sub.2O.sub.3, and SiO.sub.2.