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ALUMINIUM SILICATE


Aluminium silicate (or aluminum silicate) is a name commonly applied to chemical compounds which are derived from aluminium oxide, Al2O3 and silicon dioxide, SiO2 which may be anhydrous or hydrated, naturally occurring as minerals or synthetic. Their chemical formulae are often expressed as xAl2O3·ySiO2·zH2O. It is known as E number E559

CAS NO: 12141-46-7
EC NUMBER: 235-253-8

IUPAC NAMES:
aluminium silicate
dialuminium(3+) tris(oxosilanebis(olate))
křemičitan oxid hlinitý n-hydrát

SYNONYMS: 
Clay; Aluminum oxide silicate (Al2O(SiO4));Aluminum silicate, natural;Aluminum silicate, synthetic;Aluminum silicate, natural [JAN];Aluminum silicate, synthetic [JAN];EINECS 235-253-8;Alumina Silicate;dialuminum,oxygen(2-),silicon(4+);Aluminum silicate felt; Aluminum silicate fibre tube; Aluminum silicate fiberboard;ALUMINIUL SILICATE; Aluminumoxidesilicate; aluminumoxidesilicate(al2o(sio4));SILLIMANITE;SILICA-ALUMINA CATALYST SUPPORT;PYRAX ABB;PYROPHYLLITE;MONTMORILLONITE (ALUMINUM PILLARED CLAY);ANDALUSITE;ALUMINIUM SILICATE; Silicic acid aluminum; FIBERFRAX(R); CATALYST (ALUMINUM PILLARED CLAY); Aluminum Silicate - Carc.;Aluminum Silicate n-Hydrate;ALUMIUM SILICATE;PURE ALUMINIUM SILICATE ;Aluinum silicate;ALUMINUM SILICATE HYDRATE; aluminium silicate - [Al2O(SiO4)]; aluminium silicate ultm-fine; ialuminum,oxygen(2-),silicon(4+); 12141-46-7; 235-253-8; ALUMINIUM OXIDE SILICATE;ALUMINIUM SILICATE;ALUMINIUM SILICATE [WHO-DD]; ALUMINUM OXIDE SILICATE;ALUMINUM OXIDE SILICATE (AL2O(SIO4)); ALUMINUM SILICATE; ALUMINUM SILICATE [II];ALUMINUM SILICATE [INCI];ALUMINUM SILICATE [MI]; ALUMINUM SILICATE, NATURAL [JAN];E-559;INS NO.559;INS-559;KAOLIN, LIGHT OR HEAVY;SILICIC ACID (H6SIO5), ALUMINUM SALT (1:2)

Aluminium silicate composite materials, fibres
Aluminium silicate is a type of fibrous material made of aluminium oxide and silicon dioxide, (such materials are also called aluminosilicate fibres). These are glassy solid solutions rather than chemical compounds. The compositions are often described in terms of % weight of alumina, Al2O3 and silica, SiO2. Temperature resistance increases as the % alumina increases. These fibrous materials can be encountered as loose wool, blanket, felt, paper or boards.

Uses    
In dental cement, glass industry; manufacture of semiprecious stones, enamels, ceramics, and coloured lakes; paint filler; in washing compounds.


Aluminium silicate material is a composite of around half alumina and half silicon oxide which features good thermal shock resistance and easily replaces carbon fixtures in many applications.

By changing process conditions, this highly versatile material can be tailored to provide a range of hardness values to suit customer requirements, whilst maintaining its thermal and electrical properties.

Aluminium silicate is excellent for the manufacture of fixtures, firing and dicing plates, and is flexible enough to be manufactured into intricate designs specified by our customers.


Aluminium silicate applications 
-Boats
-Fixtures
-Nozzles
-Furnace tooling
-Slicing tooling
-Insulators
-Glass sealing
-Brazing
-Alloying
-Soldering
-Welding

Aluminium silicate is a compound made from aluminium, oxygen and silicate that can take the form of a mineral as well as combine with water to make clay. Aluminium silicate comes in three mineral forms: andalusite, kyanite and sillimanite, all of which have the chemical formula Al2SiO5 but have distinct crystal structures. When magnesium aluminium silicate is hydrated it becomes a clay known as kaolin, which is used for treating ailments such as diarrhoea and to combat diaper rash as well as rashes from poison oak and poison ivy. 

When combined with magnesium and hydrated, the result is a clay mixture that sees common use in antacids as well as a thickener for cosmetics and other beauty products. It also appears as an inactive ingredient for deodorants. 

The kyanite form of aluminium silicate is used to create mullite for industrial use, and this compound is used by the ceramics industry as a refractory, as well as to manufacture electrical insulating materials and heating elements.

The sillimanite form is used in such industries as glass-making, metal smelting and in iron foundries.

Aluminium silicate has also been used topically as an emollient and drying agent. Specifically, it has been used to dry oozing and weeping poison ivy, poison oak, and poison sumac rashes. It has also been used as a protectant for the temporary relief of anorectal itching and diaper rash.

Aluminium silicate (or aluminium silicate) is a name commonly applied to chemical compounds which are derived from aluminium oxide, Al2O3 and silicon dioxide, SiO2 which may be anhydrous or hydrated, naturally occurring as minerals or synthetic. Their chemical formulae are often expressed as xAl2O3.ySiO2.zH2O These include the compounds:-; Al2SiO5, (Al2O3.SiO2), which occurs naturally as the minerals andalusite, kyanite and sillimanite which have different crystal structures. Al2Si2O5(OH)4, (Al2O3·2SiO2·2H2O), which occurs naturally as the mineral kaolinite and is also called aluminium silicate dihydrate. It is a fine white powder and is used as a filler in paper and rubber and also used in paints. Al2Si2O7, (Al2O3.2SiO2), called metakaolinite, formed from kaolin by heating at 450°C (842°F). Al6SiO13, (3Al2O3.2SiO2), the mineral mullite, the only thermodynamically stable intermediate phase in the Al2O3-SiO2 system at atmospheric pressure. 

Alumina, Al2O3, and silica, SiO2, are the two most abundant minerals of the earth crust. The class of minerals containing aluminum oxide and silicon oxide is called aluminum silicates.
Many minerals contain aluminum and silicon oxides. For example, three minerals andalusite, sillimanite, and kyanite all have the same chemical composition of Al2O(SIO4). Topaz is closely related to chemical composition, Al2O(SIO4)(OH, F)2.
Layer aluminium silicates such as kaolinite group of minerals of Al4(Si4O10)(OH)8 results from weathering of the feldspar group of minerals, (K, Na)(AlSi3O8, or Ca(Al2Si2O8. The koalinite group is an important clay mineral. The picture shown here is the structure of kaolinite. Two layers are shown here, the bottom octahedral layer represents the oxygen atoms and the 6-coordinated Al atoms or ions. Some of these oxygen atoms are shared with 4-coordinated silicon on the top layer, each tetrahedron represents a SiO4 group.

Zeolites are the most important group of aluminum silicates. About 40 natural zeolites are known and 150 zeolites have been synthesized.


The search for white fillers that can replace and compete with titanium dioxide have favoured amorphous aluminium silicates. Aluminium and sodium silicate is a white-coloured amorphous solid, obtained by the reaction of chemical precipitation between a sodium silicate and an aluminium salt in aqueous medium. It is a filler with many different applications, and it is used as a raw material in sectors such as the manufacture of paints, printing inks, the rubber or the paper sector.

Product
aluminium silicate is used as a white pigment in paints, printing inks and paper, where it acts as a partial substitute for titanium dioxide (extender) at the same time as it increases the covering power and brightness both of the paint and of the paper.

aluminium silicate is the amorphous sodium and aluminium silicate manufactured by IQESIL and which is used as a white filler in rubber, with a moderate reinforcing nature. Its application is especially indicated in the preparation of technical rubber pieces via an extrusion or injection moulding process.

Both the natural and synthetic rubber blends, which contain aluminium silicate present good processability, even with higher filler levels than the reinforcing silica, as well as good vulcanisation properties. Their slightly alkaline nature permits their use in basic blends.
 
Aluminium silicate is approved for use in the EU as an insecticide and insect repellent. It has low mammalian toxicity. Aluminium silicate is virtually insoluble in water and in many organic solvents. Little data has been published regarding its environmental fate.

Aluminum Silicate is clay-like ingredients that are based on silicates. In cosmetics and personal care products, these ingredients are used in a wide variety of product types, including bath products, makeup and skincare products.


Aluminum Silicate, Calcium Silicate, Magnesium Aluminum Silicate, Magnesium Silicate, Magnesium Trisilicate, Sodium Magnesium Silicate, Zirconium Silicate, Attapulgite, Bentonite, Fuller's Earth, Hectorite, Kaolin, Lithium Magnesium Silicate, Lithium Magnesium Sodium Silicate, Montmorillonite, Pyrophyllite and Zeolite are all clay-like ingredients that are based on silicates. In cosmetics and personal care products, these seventeen ingredients are used in a wide variety of product types, including bath products, makeup and skincare products.


Aluminum silicate (Al2SiO5) is also known as kaolin, or hydrated aluminum silicate when in powder form. Aluminum silicate is a mixture of alumina, silica, and oxygen. Kaolin is often used as a demulcent and adsorbent in the pharmaceutical industry. It is used in colour lakes (insoluble dyes). As a raw material, it is commonly found in paper, plastics, cosmetics, and pharmaceuticals, and it is also used in pharmaceutical preparations as a filtering agent to clarify liquids. As a medicinal agent, kaolin is used to treat diarrhoea. In dentistry, used to add toughness and opacity to porcelain teeth. Other common names for hydrated aluminum silicate include heavy or light kaolin, china clay, bolus alba, porcelain clay, white bole, and argilla.

Aluminum silicate, also known as aluminium silicate, is a mixture of aluminum, silica, and oxygen that can be either a mineral or combined with water to form a clay. It can also combine with other elements to form various other minerals or clays. Some of these forms are used medicinally and industrially. They retain their strength at high temperatures — a property known as being refractory. Some of the minerals are used as gemstones.

Mineral aluminium silicate comes in three different forms — kyanite, andalusite, or sillimanite. They all have the chemical formula Al2SiO5, but they have different crystal structures. All three forms are rarely found in the same rock, because each occurs under different conditions of pressure and temperature. Only kyanite and sillimanite are used industrially.

Kyanite is unusual in that its hardness varies, depending on the direction of the crystals. Some of the crystals are similar to blue sapphires and are used as gemstones. Kyanite is also used in the making of the frequently used industrial compound mullite. This compound has the chemical formula 3Al2O3.2SiO2. It is used as a refractory in the ceramics industry and in the manufacture of many things, including high voltage electrical insulations, glass, and heating elements.

Sillimanite can also be used as a refractory. It is used in a variety of industries. These include glass-making, ceramics, cement, iron foundries, and metal smelting.

Aluminum silicate can be hydrated or have water molecules associated with it. In this case, it forms clay. Kaolin is the term for a group of clay minerals with the chemical formula of Al2O3.2SiO2.2H20. It forms a layer of two alternating crystals — one of silicon-oxygen and one of alumina. Kaolinite is the main constituent of kaolin.

Kaolin has been used for many years to control diarrhoea and to dry poison ivy and poison oak rashes. It has also been used to treat diaper rash. Commercially, it has been important in the ceramics industry, particularly for the production of fine porcelain. It is also used to manufacture cement, bricks, and insulators, among other things.

Another aluminum silicate compound found as a mineral and as clay is magnesium aluminum silicate, which is composed of magnesium, aluminum, silica, and oxygen. In its mineral form, it is a type of garnet called pyrope. It is often used as a gemstone and is the only garnet to always be red in colour. Its chemical formula is Mg3Al2(SiO4)3, although there are frequently trace amounts of other elements present.

The hydrated form of magnesium aluminum silicate is a mixture of clays. This purified mixture is commonly used as an antacid. It is also used as a thickener in beauty products and cosmetics, and as an inactive ingredient in deodorants.

Sodium aluminum silicate is also referred to as sodium aluminosilicate and is composed of sodium, aluminum, silica, and oxygen. Two minerals of this type are albite and jadeite. Albite has the chemical formula of NaAlSi3O8, while that of jadeite is NaAlSi2O6. Albite is common in Earth’s crust and breaks down under pressure to form jadeite and quartz. Jadeite is one of the types of minerals that make up the gemstone jade.

There is an industrial form of sodium aluminosilicate, known as synthetic amorphous sodium aluminosilicate, that contains water. This is a series of compounds and does not have a fixed chemical composition. It is used as an additive in powdered foods to keep lumps from forming.

Synthetic zeolites are prepared from sodium aluminosilicate. These are minerals that are very porous and are used commercially as adsorbents. They are used primarily as laundry detergents, although they have a variety of other industrial uses.


Application areas

Cleaning of façades and monuments (fine grains).
Heritage restoration works (fine grains).
High- and low-pressure blasting with portable equipment (all-grain sizes).
Paint stripping, roughening (coarse grains).
Outdoor blasting work (all-grain sizes).
Blasting and stripping of wood (fine grains).
Surface preparation for the subsequent process. Sa 2 ½ Sa 3. (coarse grains).
Removing rust and scale.
Does not contain free silica. Natural substitute for sand for blasting work in general.


Same as for clay i.e. ceramic products, refractories, colloidal suspensions, oil-well drilling fluids, filler for rubber and plastic products, films, paper coating, decolorizing oils, temporary moulds, filtration, carrier in insecticidal sprays, catalyst support.

Aluminium silicate, also known as coal slag is a dispensable abrasive which is a by-product of coal-fired electric power generation plants. aluminium silicate generates less dust than copper slag and is mainly used in open blasting operations in the oil- and shipyard industry.

aluminium silicate also referred to as aluminum silicate, is a compound made from aluminum, oxygen and silicate that can take the form of a mineral as well as combine with water to make clay. It has a hardness of 1-2 on the Mohs scale of mineral hardness. The refractive index of aluminium silicate is 1.56 and the density is 2.8 to 2.9 g/cm.

Aluminium silicate comes in three mineral forms: andalusite, kyanite and sillimanite, all of which have the chemical formula Al2SiO5 but have distinct crystal structures.

Another compound, magnesium aluminum silicate, is a garnet known as pyrope when found in the mineral form and is considered to be the only garnet that is always red.

Sodium aluminosilicate contains water and is referred to as synthetic sodium aluminosilicate, which manufacturers add to powdered foods to prevent lump formation.

Aside from its use in medicine, kaolin also has industrial uses. The ceramics industry uses it to produce fine porcelain, for example. You can also use kaolin to make bricks and cement.

Aluminum silicate is used to prepare aluminium-silicate polymer composite (PASiC), which is an inorganic coagulant used in water treatment. It is used as a catalyst for the pyrolysis of rice husk to crude bio-oil, which upgraded to supercritical ethanol. Further, it is used as filler in paper, rubber and in paints
 

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