Nanocomposite ceramic or glass materials are disclosed herein, which include a matrix material and one or more nanostructures dispersed within the matrix material. The nanostructures may comprise one or more core-shell nanostructures including a core nanostructure and a shell material. The shell material may be different from the material making up the core nanostructure and may improve the wettability of the core-shell nanostructure, the dispersion of the core-shell nanostructure within the matrix material, or make the core-shell nanostructure more resistant to oxidation, when compared to the core nanostructure alone. Methods of making nanocomposite ceramic or glass materials are also disclosed herein.

A seal for a solid oxide fuel cell includes a glass matrix having glass percolation therethrough and having a glass transition temperature below 650 C. A deformable second phase material is dispersed in the glass matrix. The second phase material can be a compliant material. The second phase material can be a crushable material. A solid oxide fuel cell, a precursor for forming a seal for a solid oxide fuel cell, and a method of making a seal for a solid oxide fuel cell are also disclosed.

A method of manufacturing a heat exchanger core from glass ceramic matrix composite includes placing one or more reinforcing fibers around one or more mandrels into a mold cavity. A glass matrix material infiltrates the one or more reinforcing fibers to produce an infiltrated core and the one or more mandrels is removed to create one or more passages passing through the infiltrated core.

The present application relates to boron nitride nanotube (BNNT)-silicate glass composites and to methods of preparing such composites. The methods comprise mixing BNNTs that are coated with a glass former such as boron oxide with a silicate glass precursor to create a mixture; heating the mixture under conditions to obtain a molten silicate glass; and cooling the molten silicate glass under conditions to obtain the BNNT-silicate glass composite.

A glass fiber and method for producing the same are provided. The method includes a covering process, a sintering process, a mixing process, and a drawing process. The covering process is implemented by covering a molybdenum compound onto a plurality of surfaces of a plurality of inorganic particles to form a plurality of modified inorganic particles. The sintering process is implemented by sintering the modified inorganic particles in a nitrogen atmosphere having a temperature of between 400 C. and 1,000 C. The mixing process is implemented by mixing the modified inorganic particles in a glass raw material that is in a molten state. The drawing process is implemented by drawing the glass raw material mixed with the modified inorganic particles to form a plurality of glass fibers.

A glass fiber and method for producing the same are provided. The method includes a covering process, a sintering process, a mixing process, and drawing process. The covering process is implemented by covering a tungsten compound onto a plurality of surfaces of a plurality of inorganic particles to form a plurality of modified inorganic particles. The sintering process is implemented by sintering the modified inorganic particles in a nitrogen atmosphere having a temperature of between 400 C. and 1,000 C. The mixing process is implemented by mixing the modified inorganic particles into a glass raw material that is in a molten state. The drawing process is implemented by drawing the glass raw material mixed with the modified inorganic particles to form a plurality of glass fibers.

A glass fiber and a method for producing the same are provided. The method includes: dissolving a tungsten compound into a first organic solution to form a tungsten compound sol; adding a sulfur source into the tungsten compound sol and stirring the sulfur source and the tungsten compound sol to form a tungsten sulfide gel; placing the tungsten sulfide gel in an environment having a temperature of between 600 C. and 1,200 C. for 4 hours to 6 hours to form tungsten sulfide powder; covering the tungsten sulfide powder on a plurality of surfaces of inorganic powder to form modified inorganic powder, mixing the modified inorganic powder into a glass raw material that is in a molten state; and drawing the glass raw material mixed with the modified inorganic particles to form into a plurality of glass fibers.

A glass composition, a macrocomposite, and methods of forming the macrocomposite including dispersing or immersing a metal in a glass. Preferably, the macrocomposite does not include an organic resin, an adhesive, or a polymer.

A glass-ceramic structure that includes first ceramic layers containing crystals and second ceramic layers containing crystals. The crystal content of the first ceramic layers is different from the crystal content of the second ceramic layers. The shortest distance in a thickness direction from a surface of the glass-ceramic structure to the second ceramic layer and the thickness of the second ceramic layer is 10. The crystals include at least one type selected from Al.sub.2O.sub.3, Zn.sub.2SiO.sub.4, ZnO, ZnAl.sub.2O.sub.4, BaAl.sub.2Si.sub.2O.sub.8, ZnTiO.sub.3, Al.sub.2TiO.sub.5, TiO.sub.2, Mg.sub.2SiO.sub.4, MgSiO.sub.3, and MgO. The percentage of a cross-sectional area of the crystals in the second ceramic layers relative to a cross-sectional area of the second ceramic layers is greater than a percentage of a cross-sectional area of the crystals in the first ceramic layers relative to a cross-sectional area of the first ceramic layers by a difference of 10 area % to 75 area %.

A vitrified bond grindstone includes abrasive grains and a bonding material for fixing the abrasive grains, the bonding material includes a parent material containing SiO.sub.2 as a main constituent, a sintering assistant oxide, and ZnO, and the content of ZnO is 11 to 15 wt % in weight ratio based on the bonding material. Preferably, the content of the sintering assistant oxide is 20 to 29 wt % in weight ratio based on the bonding material.