초록 ▼

Brick and tile products are made from a homogeneous mixture of low grade in expensive ceramic microspheres and clay or other binding agent. The microspheres have an axial oxide content under 6 percent by weight and a melting point in excess of the temperature at which brick and tile are fired. The m

Brick and tile products are made from a homogeneous mixture of low grade in expensive ceramic microspheres and clay or other binding agent. The microspheres have an axial oxide content under 6 percent by weight and a melting point in excess of the temperature at which brick and tile are fired. The microspheres have random sizes ranging between one third and 200 microns. Brick utilizing the invention is significantly lower in weight and permeability, require much less energy to sinter and less time for firing. Improved thermal and acoustic insulation value is obtained with the invention, and vulnerability to thermal shock is diminished.

대표청구항 ▼

A fired, polycrystalline building product sintered to hardness in a kiln to a predetermined product temperature and formed of a substantially homogeneous combination comprising water and a mixture of binding medium and ceramic microspheres obtained from fly ash residue produced as a result of coal c

A fired, polycrystalline building product sintered to hardness in a kiln to a predetermined product temperature and formed of a substantially homogeneous combination comprising water and a mixture of binding medium and ceramic microspheres obtained from fly ash residue produced as a result of coal combustion, said microspheres having a melting point in excess of said product temperature, said microspheres having an alkali oxide content wherein the total weight of said alkali oxide content does not exceed 6% of the weight of said microspheres.