King Abdulaziz City for Science and Technology

Omar A Alharbi

Mohammed Binhussain

Esmat M A Hamzawy

Esmat M Hamzawy

The invention provides a glazed composite manufactured using waste materials, wherein the waste materials are capable of producing ceramic forming oxides, glass modifying oxides and ceramic modifying oxides. The waste materials include ceramic waste and colored glass waste. The invention also provides a method for manufacturing composition of the glazed composite.

Self glazed ceramic/glass composite and method for manufacturing the same

The invention provides an artificial marble and a method for manufacturing the artificial marble. The artificial marble is manufactured using raw materials such as silica, fluorspar and one or more waste materials. The one or more waste materials are selected from a group that includes limestone, clay, magnesite and phosphate.

Artificial marble and method for manufacturing the same

Disclosed is the preparation of sintered cordierite-based glass-ceramic bodies via a procedure which uses three all natural starting materials which are white sand, kaolin clay and magnesite. These three raw materials, which are preferably sourced from the same geographic area such as Saudi Arabia, are combined in relative amounts which form, upon subsequent mixing and heating, a specific mixture of oxides of silicon, aluminum and magnesium. Upon melting at 1500-1550&#xb0; C., this combination of raw materials forms transparent brown glass which after solidification by quenching is then crushed and reduced to grains having a median particle size less than 65 microns. These brown glass grains are consolidated, for example by compaction, to form a green body for sintering. Sintering of the green body at temperatures between about 1000&#xb0; C. and 1375&#xb0; C. for from 2 to 5 hours produces glass-ceramic bodies containing a polycrystalline material which comprises mostly material of the cordierite crystal structure. Such cordierite-based glass-ceramic bodies have density, microhardness, CTE and dielectric constant properties which make them suitable for use in various technical fields such as cookware, water filtration devices and equipment, and electronics.

Preparation of sintered cordierite glass-ceramic bodies

Disclosed is the preparation of sintered cordierite-based glass-ceramic bodies via a procedure which uses three all natural starting materials which are white sand, kaolin clay and magnesite. These three raw materials are combined in relative amounts which form, upon subsequent mixing and heating, a specific mixture of oxides of silicon, aluminum and magnesium. Upon melting at 1500-1550&#xb0; C., this combination of raw materials forms transparent brown glass which after solidification by quenching is then crushed and reduced to grains having a median particle size less than 65 microns. These brown glass grains are consolidated, for example by compaction, to form a green body for sintering. Sintering of the green body at temperatures between about 1000&#xb0; C. and 1375&#xb0; C. for from 2 to 5 hours produces glass-ceramic bodies containing a polycrystalline material which comprises mostly material of the cordierite crystal structure.

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Riyadh, Saudi Arabia

Omar A Alharbi