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Ceramics are the common denomination to all the articles or object's
produced with clay and burned to the fire. The hashing of the adobe in
ceramics happens during the burning. When the clay is burnt and becomes
firm, in its first burning gets the call "biscuit", that although
more not to come back to the plastic state still possesses characteristic
fragile, therefore to fall themselves in the soil or to take a stronger
collision, has been broken in many pieces. The clay exists in all terrestrial
surfaces. Some types are found the open sky and others in underground
mines or deposits. The clay when removed of the nature generally it contains
elements undesirable, organic impurities, and therefore needs to be benefited
through mechanical and chemical processes. For each category of the ceramic
production the production of the argillaceous masses needs the upgrade
or the withdrawal of elements in its composition, in accordance with its
application, thus preventing the occurrence of cracks and ravages. Of
the many existing types of clay the masses ceramic that are used in the
manufacture of ceramic utensils as roofing tiles, bricks, flanged union,
floor, etc. are produced; that it is call the "structural ceramic".
The masses of adobe are raw employees in the construction of housings.
Called it used "white ware" in sanitary parts, tiles, electric,
conducting floor of high impact, refractory, insulators is had electric,
etc. And the ceramic masses for the artistic ceramic call.
The Ceramics can be defined as material inorganic, non-metallic gotten
generally after thermal handling in high temperatures. The ceramic materials
are manufactured from raw materials classified in natural and synthetic.
The natural ones more used industrially are: clay, caulino, quartz, feldspato,
filito, talco, calcite, dolomite, magnesia, cromita, bauxite, graphite
and zirconium. The synthetic ones, among others include alumina (aluminium
oxide) under different forms (calcined, eletro funded); silicon carbonate
and the most diverse inorganic chemical products.
Ceramics have electric properties as isolating of high-voltage, in resistances,
as the memory in computers, candles in the internal combustion of engines
and, more recently, in applications of superconductors of high temperature.
Ceramics are essential for the construction industry, for the petrochemical
industries, to generate electricity, for the communications, space exploration,
medicine, sanitary. Porous porcelain done ceramics filters can isolate
microbes and bacteria of milk and drinking waters, to separate dust of
gases and to remove particles solid of liquid.
Ceramics Shields, which are light and resistant to the impact, they have
been confectioned to protect military airplanes, vehicles and soldiers.
Ceramic mono-crystals have important mechanical, electric and optic applications.
Ceramics include item so delicate that they can be broken by a light touch,
so resistant that they can protect our proper body and so lasting that
they remain after thousand of more remote years disclosing to us it history
of our ancestral ones.
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