초록 ▼

The invention relates to a ceramic molding which is manufactured from high-temperature resistant, fire-resistant or refractory fibers and fine-grain, fire-resistant or refractory materials and, in certain cases, from other customary additives. The ceramic molding is characterized by the fact that it

The invention relates to a ceramic molding which is manufactured from high-temperature resistant, fire-resistant or refractory fibers and fine-grain, fire-resistant or refractory materials and, in certain cases, from other customary additives. The ceramic molding is characterized by the fact that its porosity gradually and continuously increases along an axis of the molding from less than 20% to more than 70%. The areas with low porosity comprise the fine-grain, fire-resistant or refractory materials. The areas of high porosity comprise ceramic fiber, such as, fibers of Al2O3, SiO2, ZrO2, C, SiC or mixtures thereof. The intermediate areas are constructed of mixtures of ceramic fiber and fire-resistant or refractory materials. The invention also relates to the use of such a ceramic molding method for the manufacture of compound moldings saturated or infiltrated with organic resins, pitch, tar, metals, metal alloys or glasses.

대표청구항 ▼

A ceramic molding manufactured from high-temperature resistant fire-resistant or refractory fibers; and fine-grain, fire-resistant or refractory materials; and additives chosen from a member of the group consisting of surface active materials, densifiers, flocculants, polyacrylate dispersions and co

A ceramic molding manufactured from high-temperature resistant fire-resistant or refractory fibers; and fine-grain, fire-resistant or refractory materials; and additives chosen from a member of the group consisting of surface active materials, densifiers, flocculants, polyacrylate dispersions and combinations thereof, said molding having a porosity of less than 20%, increasing gradually and continuously along an axis of the molding up to more than 70%, wherein the areas with low porosity comprise basically the fine-grain, fire-resistant or refractory materials such that a good dispersion of the fine grain materials and refractory materials is assured, wherein the areas of high porosity comprise the addivtives and a ceramic fiber on the basis of fibers selected from the group consisting of Al2O3, SiO2, ZrO2, C, SiC or mixtures thereof, and wherein the intermediate areas comprise mixtures of the ceramic fiber and fire-resistant or refractory materials.