Also known as silicon dioxide (SiO2), is a compound of high nature, with a wide range of uses, in the form of free quartz or in association with silicates. Silica is a colorless, tasteless and physiologically inert substance. Insoluble in water, many acids or alkalis. However, hydrogen is dissolved in fluoride and very slowly in hot phosphoric acid.
The silica crystals are hard and transparent and melt at about 1600 ° C. Silica is found in nature with various crystal structure. For example, quartz, hexagonal; cristobalite, tetragonal and tridimide; Silica combines with some metal oxides to form precious stones. Silica; glass, water glass, ceramic, glaze, refractory materials, crucible, sandpaper, concrete, mortar, silicon carbide and other silicon compounds. The silica in powder form is used as a filler in heat insulation in resin, pharmacy, cosmetic, and in the paper industry.
Silicosis: It is a lung disease that occurs mostly by workers working in mines and quarries, potters and inhalation of silica powders. Symptoms occur within 3-5 years or 20 years after the powder density at the workplace. The silica particles with a diameter of less than about 5 microns reach the bronchioles in the lungs. It is held here by the macrophages in the air sacs. Later, by the disintegration of macrophases and the release of enzymes, tubers are formed in the lung tissue. Thus, the flexibility of the lungs decreases and breathing difficulties occur. The main symptoms are cough, bloody sputum, and difficulty breathing.
Silica sand contains SiO2. Silicium and O2 are among the most common elements in the world and together form one of the 3 minerals in the rock form in the world. Silica is found in three main crystal forms. It is mostly found in mineral quartz form.
quartzite; In general, quartz sand grains, a cement composed of silici are connected to each other with a very strong bond is a rock type. The chemical composition of quartzite is SiO2 such as quartz, sandstone (quartz sand) and quartz sand; It can be found.
Quartzite resistance is a very strong and corrosive rock. Therefore, it is quite difficult and expensive to grind. Quartzites can be used in the glass and ceramic industry if the SiO2 content is high and the iron content is less than 0.4%. These ores are very resistant to temperature and chemical effects. Because of this feature is used in different branches of industry.
Silica sand is a type of sand that is found on the river and lake sides in the places where the underground resources are usually found. Chemical Icon S02.It is generally used as a molding material in foundries, however, in the production of jambs, silica sand is mixed with various components to make it into mortar and to be a styrofoam coating. Zircon, chromite, olivine and milled ceramic minerals are used in certain proportions in the casting sand.
It is one of the most important features of the facade cladding that it is preferable to have silica sand paintable and it can be easily accepted by paint on the jamb materials and it can be easily dyed with water-based paint.