A sintered body includes a crystal grain containing silicon nitride, and a grain boundary phase. If dielectric losses of the sintered body are measured while applying an alternating voltage to the sintered body and continuously changing a frequency of the alternating voltage from 50 Hz to 1 MHz, an average value ε.sub.A of dielectric losses of the sintered body in a frequency band from 800 kHz to 1 MHz and an average value ε.sub.B of dielectric losses of the sintered body in a frequency band from 100 Hz to 200 Hz satisfy an expression |ε.sub.A−ε.sub.B|≤0.1.

A sacrificial ceramic CO.sub.2 sequestration architectural product comprising a sintered/heat-treated mixture that comprises: one or more reactive solid phases, wherein each reactive solid phase comprises one or more weathering materials capable of enhanced mineralization, and one or more particle-bridging phases that bridge the one or more reactive solid phases, and an open porosity that is in a range from about 15 vol% to about 30 vol%.

The present invention provides A magnesium oxide whisker in-situ formed MA spinel-reinforced magnesium oxide-based ceramic foam filter and a method for preparing the same. The method comprising: 1) preparing a ceramic slurry having a solid content of 60%-70% by dosing 15%-25% by mass of a nanometer alumina sol, 0.8%-1.5% by mass of a rheological agent, and the balance magnesium oxide ceramic powder comprising magnesium oxide whiskers, and then adding deionized water and ball milling to mix until uniform, and then vacuum degassing the mixture; 2) soaking a polyurethane foam template into the ceramic slurry, squeezing by a roller press the polyurethane foam template to remove redundant slurry therein to make a biscuit, and drying the biscuit by heating it to 80° C.-1200° C.; 3) putting the dried biscuit into a sintering furnace, elevating the temperature to 1400° C.-1600° C. and performing a high temperature sintering, cooling to the room temperature with the furnace to obtain the magnesium oxide-based ceramic foam filter.

To provide a sintered body with improved impact resistance due to impact absorption through plastic deformation before brittle fracture for an impact exceeding the fracture resistance of the sintered body, and/or a method for producing the sintered body.

A sintered body including: zirconia containing a stabilizer; and a region in which an impact mark is formed when an impact force is applied.

A cubic boron nitride sintered material includes: 0 to 85 volume % of cubic boron nitride grains; and a binder phase, wherein the binder phase includes at least one selected from a group consisting of one or more first compounds and a solid solution originated from the first compounds, the cubic boron nitride grains include, on number basis, more than or equal to 50% of cubic boron nitride grains each having an equivalent circle diameter of more than 0.5 μm, and includes, on number basis, less than or equal to 50% of cubic boron nitride grains each having an equivalent circle diameter of more than 2 μm, and when a mass of the cubic boron nitride grains is assumed as 100 mass %, a total content of lithium, magnesium, calcium, strontium, beryllium, and barium in the cubic boron nitride grains is less than 0.001 mass %.

A cubic boron nitride sintered material includes: to 98 volume % of cubic boron nitride grains; and a binder phase, wherein the binder phase includes at least one selected from a group consisting of one or more first compounds and a solid solution originated from the first compounds, the cubic boron nitride grains include, on number basis, more than or equal to 50% of cubic boron nitride grains each having an equivalent circle diameter of more than 0.5 μm, and includes, on number basis, less than or equal to 50% of cubic boron nitride grains each having an equivalent circle diameter of more than 2 μm, and when a mass of the cubic boron nitride grains is assumed as 100 mass %, a total content of lithium, magnesium, calcium, strontium, beryllium, and barium in the cubic boron nitride grains is less than 0.001 mass %.

The present disclosure relates to a porous ceramic media that may include a chemical composition, a phase composition, a total open porosity content of at least about 10 vol. % and not greater than about 70 vol. % as a percentage of the total volume of the ceramic media, and a nitric acid resistance parameter of not greater than about 500 ppm. The chemical composition for the porous ceramic media may include SiO.sub.2, Al.sub.2O.sub.3, an alkali component and a secondary metal oxide component selected from the group consisting of an Fe oxide, a Ti oxide, a Ca oxide, a Mg oxide and combinations thereof. The phase composition may include an amorphous silicate, quartz and mullite.

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.

A ceramic product and a method of producing the ceramic product produced by pretreating the feedstock from at least of iron/steel recovery, recovery of at least one non-ferrous material, sieving, crushing, milling, aging, and thermal treatment, receiving as a first powder a first recovered material from the pretreating, receiving as a second powder a second recovered material from the pretreating, combining the first and second powders with water to form at least one of an extrudable paste and a granulated mixture, forming a green body from the at least one of the extrudable paste after extrusion and the granulated mixture; drying the green body, firing the green body to form the ceramic product, and cooling the ceramic product.

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.