A method for the manufacture of a carbon composite comprises compressing a combination comprising carbon and a binder at a temperature of about 350 C. to about 1200 C. and a pressure of about 500 psi to about 30,000 psi to form the carbon composite; wherein the binder comprises a nonmetal, metal, alloy of the metal, or a combination thereof; wherein the nonmetal is selected from the group consisting of SiO.sub.2, Si, B, B.sub.2O.sub.3, and a combination thereof; and the metal is selected from the group consisting of aluminum, copper, titanium, nickel, tungsten, chromium, iron, manganese, zirconium, hafnium, vanadium, niobium, molybdenum, tin, bismuth, antimony, lead, cadmium, selenium, and a combination thereof.

A composite sintered body according to the present invention contains at least cubic boron nitride and a binder. Cubic boron nitride has a continuous skeleton structure as a result of bonding of a plurality of first cubic boron nitride particles to each other. The binder has a continuous structure as a result of bonding of a plurality of binder particles to each other, that are present in a region except for a bonding interface where the first cubic boron nitride particles are bonded to each other. Second cubic boron nitride particles isolated from the first cubic boron nitride particles forming the skeleton structure are dispersed in the continuous structure of the binder particles.

A refractory object may include a zircon body that may include at least about 0.1 wt. % and not greater than about 5.5 wt. % of an Al.sub.2O.sub.3 containing component for a total weight of the zircon body. The zircon body may further include at least about 25 wt. % and not greater than about 35 wt. % of a SiO.sub.2 component for a total weight of the zircon body.

Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.

An inorganic fiber containing silica, alumina, one or more alkali metal oxides, and one or more of alkaline earth metal oxides, transition metal oxides, or lanthanide series metal oxides. The inorganic fiber exhibits good thermal performance at use temperatures of 1260? C. and greater, retains mechanical integrity after exposure to the use temperatures, is free of crystalline silica upon devitrification, is alkali flux resistant, exhibits low bio-persistence in an acidic medium, and exhibits low dissolution in a neutral medium. Also provided are thermal insulation products incorporating the inorganic fibers, a method for preparing the inorganic fiber and a method of thermally insulating articles using thermal insulation prepared from the inorganic fibers.

A carbon composite comprises: at least two carbon microstructures; and a binding phase disposed between the at least two carbon microstructures; wherein the binding phase includes a binder comprising one or more of the following SiO.sub.2; Si; B; B.sub.2O.sub.3; a metal; or an alloy of the metal, and the metal is at least one of aluminum; copper; titanium; nickel; tungsten; chromium; iron; manganese; zirconium; hafnium; vanadium; niobium; molybdenum; tin; bismuth; antimony; lead; cadmium; or selenium.

Provided are a corrosion-resistant member and an electrostatic chuck device using the same, in which corrosion resistance to halogen corrosive gas such as fluorine corrosive gas or chlorine corrosive gas and plasma thereof is high, dielectric constant and volume resistivity are high, and dielectric loss is low. The corrosion-resistant member is formed of a composite oxide sintered compact containing aluminum, samarium, and a rare earth metal element other than samarium, in which the rare earth metal element other than samarium has an ionic radius of 0.8810.sup.10 m or more.

A sintered refractory product having the form of a block and consisting of a granulate formed by all the grains having a size larger than 100 m, referred to as coarse grains, and a matrix binding the coarse grains and consisting of the grains having a size smaller than or equal to 100 m, the granulate representing between 45% and 90% by mass of the product, the product having a composition such that, in a mass percentage based on the oxides: Al.sub.2O.sub.3>80%, SiO.sub.2<15%, Na.sub.2O<0.15%, Fe.sub.2O.sub.3<0.05%, CaO<0.1%, the other oxides forming the remainder up to 100%, and the Na.sub.2O content in the matrix being greater than 0.010%, in a mass percentage based on the mass of the product.

An alumina sintered body according to the present invention has a degree of c-plane orientation of 90% or more as determined by Lotgering's method from an X-ray diffraction profile obtained by irradiating a plate surface with X-rays in a range of 2=20 to 70. The alumina sintered body has no pores when a cross-sectional surface formed in a direction perpendicular to the plate surface is polished using an Ar.sup.+ ion beam and a mask and is examined under a scanning electron microscope at a magnification of 5,000 times. The alumina sintered body has a total mass fraction of impurity elements other than Mg and C of 100 ppm or less. This alumina sintered body has a high degree of orientation, high density, and high purity and thus has a higher optical translucency than those known in the art.

An inorganic membrane filtration article and methods for making the same. The membrane filtration article includes a sintered flow-through ceramic honeycomb with a plurality of partition walls defining a plurality of open channels from an inlet end of the honeycomb to an outlet end of the honeycomb. The honeycomb is formed from a cordierite composition with low-sodium and/or low-potassium content for enhanced filtration performance.