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Sodium silicate

Sodium silicate

In this article, we discuss sodium silicate. To buy and know the price of super lubricant, tile adhesive, anti-acid mortar, rebar planting adhesive, concrete restorer, epoxy and antifreeze grout, etc., you can contact Shimi Abadgaran company.

Sodium silicate

Sodium silicate is a general term for compounds represented by the formula Na2xSiyO2y+x or (Na2O)x・(SiO2)y, such as sodium metasilicate Na2SiO3, sodium orthosilicate Na4SiO4, and sodium pyrosilicate Na6Si2O7. Anions are often polymeric. These compounds are generally clear and colorless solids or white powders that are soluble in water in varying amounts. Sodium silicate is also the common technical name for a mixture of such compounds, primarily metasilicates, also called water glass, water glass, or liquid glass.

This product is used in a wide range of applications including cement compounding, passive fire protection, fiber and wood processing, refractory ceramic production as adhesive and silica gel production. Commercial products available in aqueous or solid solutions are often green or blue in color due to the presence of iron-containing impurities. In industry, different grades of sodium silicate are identified by their SiO2:Na2O weight ratio (which can be converted to a molar ratio by multiplying by 1.032). The ratio varies between 1:2 and 3.75:1.

Properties

Sodium silicate is a solid or white glassy or colorless crystalline powder. All of them, except the rich silicones, dissolve easily in water and form an alkaline solution. Sodium silicate is stable in alkaline and neutral solutions. In acidic solutions, silicate ions react with hydrogen ions to form silicic acid, which tends to decompose into a hydrated silicon dioxide gel. When heated to expel water, it produces a hard, translucent substance called silica gel, which is widely used as a desiccant. It can withstand up to 1100 degrees Celsius.

Uses

The main uses of sodium silicate are detergents, paper, water treatment and construction materials.

glue

The biggest use of sodium silicate solution is cement for making cardboard. When used as a paper cement, sodium silicate joints eventually crack within a few years, at which point the paper surface cannot be cemented. The sodium silicate solution can also be used as a rotary adhesive layer to bond glass to glass or silicon wafers coated with silicon oxide to each other. Sodium silicate glass-to-glass bonding has the advantage of being a low-temperature bonding technique, unlike fusion bonding. It also requires less processing than glass-to-glass anodic bonding, which requires an interlayer such as SiN to act as a diffusion barrier for sodium ions. The deposition of such layers requires a low-pressure chemical vapor deposition step. However, the drawback of sodium silicate bonding is that it is very difficult to remove air bubbles. This is also because this bonding technique does not require vacuum bonding and does not use field aids such as anodic bonding. This lack of field assistance can be useful because it can create an attractive force between the wafers high enough to bend a thin wafer and cause it to collapse onto a nanofluid cavity or MEMS device.

drilling fluids

Sodium silicate is mostly used in drilling fluids to stabilize the borehole wall and prevent the collapse of the borehole wall. This is especially useful when drilling a hole through clay formations containing swollen clay minerals such as smectites and montmorillonite.

Concrete and general construction operations

Concrete treated with sodium silicate solution helps to reduce porosity in most masonry products such as concrete, plaster and plaster. This effect helps to reduce water infiltration, but its effectiveness in reducing water vapor infiltration and emission is not known. It chemically reacts with excess calcium (OH)2 (portlandite) in the concrete to form a permanent bond between the silicate and the surface, greatly improving the durability and water repellency of the concrete. This treatment is usually applied only after initial healing (up to 7 days, depending on the condition). These coatings are known as mineral silicate paints. An example of sodium silicate and calcium hydroxide in concrete reacting to form calcium silicate hydrate (or CSH) gel, the main product of hydrated portland cement.

Fireproof use

Water glass is useful as an adhesive for solid materials such as vermiculite and perlite. Mixed with the lighter weight fraction of the latter, water glass can be used to produce rigid high temperature insulating boards used in high temperature insulation such as refractories, passive fire protection, and molded pipe insulation applications. When mixed with finely divided mineral powders such as vermiculite powder (a common scrap from the exfoliation process), high temperature adhesives can be produced. In the presence of finely divided mineral dusts, the swelling disappears, thus turning the water glass into a matrix. Because of its cheap and abundant availability, water glass is popular for use in many refractory applications.

Sand casting

It is used as a sand binder in iron and steel sand casting. Strong molds can be produced rapidly by passing CO2 through a mixture of sand and sodium silicate in the mold box, which hardens the mold almost immediately.

Metal repair

Sodium silicate is used in muffler repair and installation pastes along with magnesium silicate. Sodium and magnesium silicates dissolve in water and form thick pastes that are easy to use. When the exhaust system of an internal combustion engine is heated to operating temperature, the heat will remove all excess moisture from the paste. The remaining silicate compound has glass-like properties and provides a brittle temporary restoration.

Read more: Epoxy rebar planting glue

Purchase and price of super lubricant, tile adhesive, anti-acid mortar, rebar planting adhesive, concrete restorer, epoxy grout and antifreeze company Shimi Abadgaran

With more than two decades in the field of production of chemical products for the construction industry, Abadgaran Chemical Company, in addition to producing more than a hundred types of construction chemical products, has a history of cooperation in implementation and consulting in large national, personal and corporate projects. Shimi Abadgaran Company has a large share in construction chemical products and has more than fifty production forces and laboratories. These are only a part of the extensive cooperation of chemical growers during these years. To buy and know the price of super lubricant, tile adhesive, rebar planting adhesive, anti-acid mortar, rebar planting adhesive, concrete repairer, epoxy and antifreeze grout and polymer mortars, anti-acid mortar, super lubricant and concrete repairer. , epoxy grout, anti-acid mortar, etc. You can contact Shimi Abadgaran company.

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