The present invention relates to the use of closed-pore microspheres of expanded perlite as a filler for producing moldings for the foundry industry, to a composition for producing moldings for the foundry industry, comprising closed-pore microspheres of expanded perlite as a filler, and a binder, the binder being selected from the group consisting of water glass, phenol-formaldehyde resins, two-component systems comprising as reactants a polyisocyanate and a polyol component containing free hydroxyl groups (OH groups), and starch, and also to moldings for the foundry industry and to a process for producing a molding for the foundry industry.

A method for producing microencapsulated fuel pebble fuel more rapidly and with a matrix that engenders added safety attributes. The method includes coating fuel particles with ceramic powder; placing the coated fuel particles in a first die; applying a first current and a first pressure to the first die so as to form a fuel pebble by direct current sintering. The method may further include removing the fuel pebble from the first die and placing the fuel pebble within a bed of non-fueled matrix ceramic in a second die; and applying a second current and a second pressure to the second die so as to form a composite fuel pebble.

A marking system includes a composition having at least one color precursor, a moldable substrate having a color developer, and a marking instrument for applying the composition to the moldable substrate to form at least one mark on the moldable substrate. A method of producing a colored three-dimensional molded object includes the steps of manipulating a moldable substrate having a color developer into a molded shape having an outer surface; and applying, on the outer surface of the molded shape, a first composition having at least one color precursor to a first portion of the molded shape.

Provided are a magnesia carbon brick which does not include graphite yet has excellent spalling and corrosion resistances, and a method for producing thereof. The brick is obtained by adding an organic binder to a refractory raw material mixture followed by kneading, molding, and heat-treating, wherein the mixture includes total 0.1 to 2.0 mass % of pitch and/or carbon black, total 0.1 to 1.0 mass % of aluminum and/or aluminum alloy, 3.0 to 10.0 mass % of magnesia having particle diameter of less than 0.075 mm, and 87.0 to 96.0 mass % of magnesia having particle diameter of 0.075 to 5 mm; and a mass ratio of magnesia having particle diameter of 1 to 5 mm to that of 0.075 to 1 mm is 1.66 to 2.34; graphite is not included therein; and an apparent porosity thereof after heat-treatment under reductive atmosphere at 1400 C. for 3 hours is 8.0% or less.

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.

The present application relates to a magnesium oxide based dielectric ceramics with ultrahigh dielectric breakdown strength and a preparation method thereof. The composition of the magnesium oxide based dielectric ceramic material comprises: (1x)MgO-xAl.sub.2O.sub.3, wherein 0<x0.12 and x is a mole percentage. The material has a specific composite structure with magnesium aluminate spinel acting as a second phase surrounding a principal crystalline phase, MgO.

The present invention provides for a solid body composition that is able to withstand penetration and/or reaction with salts or salt compositions in one or more states of matter (solid, liquid, gas). The composition comprises at least one aggregate and at least one binder. The aggregate may be chosen based on its thermodynamic stability compared to a salt composition. The binder comprises a resol resin or a novolac resin, or a combination of one or more of a resol resin and one or more of a novolac resin. The resin binder sets to provide initial strength then is pyrolized to form a glassy carbon which acts as a barrier to a salt phase or phases of an industrial process.

A method for producing a component includes a) providing at least two preforms each made of a carbon composite material, b) joining the at least two preforms at least at one respective connecting surface to form a composite, in which a joining compound is introduced between the joining surfaces of the preforms and then cured and the joining compound contains silicon carbide and at least one polymer adhesive, and c) siliconizing the composite to form the component. A component, such as an optical component produced thereby, is also provided.

The present invention is a granular material that can be well recoated regardless of the type of the granular material, and enables a refractory aggregate in an unprinted portion to be used without any regeneration process, in the manufacture of a three-dimensional laminated and shaped mold. This granular material is a granular material for use in three-dimensional laminated mold shaping, and obtained by adding a material that causes a hydration reaction having a moisture absorbing function and generates a catalytic effect to a coating material mixed with or coated with an acid as a catalyst which activates and hardens an organic binder for binding the granular material.

A filament containing a core material (CM) coated with a layer of shell material (SM), wherein the (CM) contains the components a) to c): a) 30 to 80% by volume, based on the total volume of the C) of at least one inorganic powder (IP), b) 20 to 70% by volume, based on the total volume of the CM of at least one binder (B) comprising component b1) b1) at least one polymer (P) and c) optionally at least one additive, wherein the at least one polymer (P) is a polyoxymethylene (POM) homopolymer, a POM copolymer or POM terpolymer and wherein at least some of the OH-end groups of the PO) homopolymer are capped, and the SM contains the components d) to f): d) 75 to 100% by volume, based on the total volume of the SM of at least one thermoplastic polymer, e) optionally at least one inorganic powder (IP), and f) optionally at least one additive, wherein the thickness of the layer of shell material is 0.05 to 0.5 mm.