A cutting tool (1) formed of a silicon nitride-based sintered body (2) including a matrix phase (3), a hard phase (4), and a grain boundary phase (10) in which a glass phase (11) and a crystal phase (12) exist. The sintered body (2) contains yttrium in an amount of 5.0 wt % to 15.0 wt % in terms of an oxide, and contains titanium nitride as the hard phase (4) in an amount of 5.0 wt % to 25.0 wt %. In an X-ray diffraction peak, a halo pattern appears at 2θ ranging from 25° to 35° in an internal region of the sintered body (2). A ratio B/A of a maximum peak intensity B to a maximum peak intensity A satisfies 0.11≤B/A≤0.40 . . . Expression (1) in a surface region of the sintered body (2), and satisfies 0.00≤B/A≤0.10 . . . Expression (2) in the internal region of the sintered body (2).

A capacitor body includes a plurality of dielectric layers and a plurality of internal electrode layers stacked alternately. The plurality of dielectric layers include crystal grains of barium titanate, a rare earth element, and silicon. The crystal grains include a first crystal grain and a second crystal grain. The crystal grains each include a surface layer as a shell and an interior portion surrounded by the shell as a core. The first crystal grain has a higher concentration distribution of the rare earth element in the shell than in the core. The second crystal grain has distribution in which a ratio of a concentration of the silicon in the core and the shell is lower than a ratio of a concentration of the rare earth element in the core and the shell in the first crystal grain.

The present invention aims to provide a lithium-ion-conducting oxide sintered body capable of providing a solid electrolyte with an excellent ion conductivity, and a solid electrolyte, an electrode and an all-solid-state battery using the same. The lithium-ion-conducting oxide sintered body including at least lithium, tantalum, phosphorus, silicon, and oxygen as constituent elements, and having a polycrystalline structure consisting of crystal grains and grain interfaces formed between the crystal grains.

A silicon carbide flow reactor fluidic module comprises a monolithic closed-porosity silicon carbide body, a tortuous fluid passage extending through the silicon carbide body, the tortuous fluid passage having an interior surface, and one or more thermal control fluid passages also extending through the silicon carbide body, the interior surface having a surface roughness of less than 10 μm Ra. A process for forming such modules is also disclosed.

A substrate support structure includes a substrate support structure body formed from a ceramic composite and having a first surface, a second surface spaced apart from the first surface, and a periphery spanning the first surface and the second surface of the substrate support structure body. The first surface, the second surface, and the periphery of the substrate support structure body are defined by the ceramic composite. The ceramic composite includes two or more of a (a) an aluminum nitride (AlN) constituent, (b) an aluminum oxynitride (Al.sub.2.81O.sub.3.56N.sub.0.44, AlON) constituent, (c) an alpha-alumina (α-Al.sub.2O.sub.3) constituent, (d) a yttrium alumina garnet (Y.sub.3Al.sub.5O.sub.12, YAG) constituent, (e) a yttrium alumina monoclinic (Y.sub.4Al.sub.2O.sub.9, YAM) constituent, (f) a yttrium alumina perovskite (YAlO.sub.3, YAP) constituent, and (g) a yttrium oxide (Y.sub.2O.sub.3) constituent. Semiconductor processing systems and methods of making substrate support structures are also described.

The bonded ceramic assembly of the present disclosure includes a first substrate made of ceramic, a second substrate made of ceramic, and a bonding layer positioned between the first substrate and the second substrate. The bonding layer contains aluminum, at least one of calcium and magnesium, a rare earth element, silicon, and oxygen. Out of a total 100 mass % of all of the components making up the bonding layer, the bonding layer contains from 33 mass % to 65 mass % aluminum in terms of oxide, a total of from 27 mass % to 60 mass % calcium and magnesium in terms of oxide, and from 2 mass % to 12 mass % rare earth element in terms of oxide. The silicon content, in terms of oxide, of the surface of the bonding layer is greater than the silicon content, in terms of oxide, of the interior of the bonding layer.

The invention provides filamentous organism-derived carbonaceous materials doped with organic and/or inorganic compounds, and methods of making the same. In certain embodiments, these carbonaceous materials are used as electrodes in solid state batteries and/or lithium-ion batteries. In another aspect, these carbonaceous materials are used as a catalyst, catalyst support, adsorbent, filter and/or other carbon-based material or adsorbent. In yet another aspect, the invention provides battery devices incorporating the carbonaceous electrode materials.

The present invention relates to the field of new materials technology, in particular to carbon nitride composite ceramic tool materials, preparation method and cutting tools thereof. The raw materials comprise carbon nitride, titanium carbonitride, molybdenum, nickel and cobalt, carbon nitride as the matrix phase, titanium carbonitride as the reinforcing phase are added to the carbon nitride based composite ceramic materials, with molybdenum, nickel and cobalt as a suitable sintering aid, dense composite tool material is obtained with vacuum hot press sintering method. The prepared carbon nitride based composite ceramic tool materials boast the advantages of low cost, high hardness, high bending strength and high fracture toughness, which is an important way to promote the innovation, development and popularization of carbon nitride materials.

A method of preparation of a ceramic slurry for use in 3D printing includes steps of: (A) providing a plasticizer and a disperser and mixing the plasticizer and the disperser evenly; (B) mixing the mixture obtained in step (A) with an adhesive, wherein the adhesive is polyvinyl alcohol; and (C) adding a Yttria-stabilized zirconia powder to the mixture obtained in step (B) to produce, by sufficient blending and deaerating, the ceramic slurry for use in 3D printing. A method of preparation of a ceramic product includes steps of: (A) preparing a ceramic slurry with the method; (B) performing 3D printing with the ceramic slurry to form a primary green body; (C) placing the primary green body in a freezer to undergo a refrigeration process, thereby causing crystallization of polyvinyl alcohol; and (D) thawing the frozen primary green body to form a plastic green body with gel structure.

A pore-free ceramic is provided that has a high modulus of elasticity and a low coefficient of thermal expansion. A process for producing a corresponding ceramic is also provided. The pore free ceramic is a dimensionally stable substrate material in applications subjected to temperature gradients including semiconductor manufacture.