Abstract:
A high temperature lightweight thermal insulating material is formed from a mixture that includes cement or silica sand, water and a foaming agent. The foaming agent can be an aluminum powder or a surfactant. The insulating material has a maximum use temperature greater than about 600 degrees Celsius.
Abstract:
A formulation produces non-wetting surfaces that are resistant to mechanical damage and to corrosion and penetration by alloys at high temperatures. The non-wetting additive is a combination of (a) calcium hexaaluminate and (b) barium sulfate, strontium carbonate, strontium sulfate, barium carbonate, or combinations of these materials. The non-wetting additive may be used with aggregate, a matrix, and silica fume.
Abstract:
La presente invención describe un procedimiento para fabricar un artículo de piedra aglomerada con elevada resistencia térmica, como un tablero para construcción o decoración. El procedimiento comprende las etapas de: poner en contacto (i) la carga inorgánica con un material refractario nanoparticulado con elevada conductividad térmica; (ii) añadir un ligante a base de una resina de poliéster; (iii) mezclar hasta obtener una masa de fabricación homogénea; (iv) distribuir una parte de dicha masa sobre un soporte; (v) prensado de la parte de masa distribuida en una prensa de vibro-compactación en condiciones de vacío; y (vi) endurecimiento de la masa por polimerización de la resina de poliéster.
Abstract:
Refractory ceramic possessing a solidus temperature between 25000°C and 28000°C having a compactness greater than 85%, the microstructure of said ceramic being such that it is composite and comprises: hafnium dioxide HfO2 grains of monoclinic structure (1); hafnium dioxide HfO2 grains of cubic structure (2) stabilized by yttrium oxide Y2O3, the yttrium oxide Y2O3 representing 0, 5 mol % to 8 mol % relative to the total number of moles of hafnium dioxide HfO2; closed pores (3) and non-interconnected open pores. The invention also relates to the process for manufacturing said ceramic and to a structural part incorporating said ceramic.
Abstract:
In one aspect, composite carbide compositions are described herein which can facilitate the efficient and/or economical manufacture of articles comprising SiC. Briefly, a composite carbide composition comprises silicon carbide (SiC) particles and a silica interparticle phase covalently bonded to the SiC particles.
Abstract:
The present invention relates to a dry refractory particulate composition comprising a zeolithic microstructure, to a green body and to a refractory lining formed therefrom, and to uses thereof.
Abstract:
Disclosed is a method of forming a set cement shape. The method comprises providing a set-delayed cement composition comprising water, pumice, hydrated lime, and a set retarder; forming the set-delayed cement composition into a shape; and allowing the shaped set-delayed cement composition to set.
Abstract:
본 발명은 무기 바인더 50~70중량%, 실리카 에어로겔 5~10중량%, 실리카계 무기 섬유 2~5중량%, 무기 중공체 20~30중량% 및 기포제 3~5중량%를 포함하는 불연성 충진 단열소재 조성물, 이를 경화하여 얻어지는 성형품, 및 상기 조성물의 제조 방법을 제공한다.