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Introduction to the characteristics of lithium silicate

What is lithium silicate?

Lithium silicate is a compound formed by the structure and formation of the metal lithium and silicate, and its trade name is lithium water glass. Most of them use the lithium hydroxide method to react sodium silicate with sulfuric acid to generate hydrated silicic acid and sodium sulfate and then react the hydrated silicic acid with lithium hydroxide to generate lithium silicate and water to obtain lithium silicate products. Lithium silicate is an odourless, tasteless, transparent liquid. It is weakly alkaline with a pH of around 11. The relative density and viscosity of the product vary with the product model, and the relative density is between 1.16 and 1.19 (25 ℃). Soluble in water and alkaline solution, insoluble in alcohol and organic solvents. It reacts with an acid to release the gel. It is self-drying, and after the water in the solution evaporates, it can form a dry film that is insoluble in water and has water irreversibility.

 

Introduction to the characteristics of lithium silicate

Lithium silicate belongs to the silicate material. The so-called silicate mainly refers to the compound composed of Si, O and other elements (such as Al, Ca, K, Na, Li, etc.). The silicate structure generally contains a silicon-oxygen tetrahedral structure, and these tetrahedrons are connected in different ways (such as single-chain, double-chain, frame-like or island-like) to form silicate substances of different structures. Lithium silicate is a series of compounds produced by the reaction of metal lithium and silicic acid, mainly divided into lithium mono silicate (Li8SiO6, Li4SiO4, Li2SiO3), lithium disilicate (Li6Si2O7, Li2Si2O5) and lithium pentasilicate (Li2Si5O11).

 

lithium silicate

How to prepare lithium silicate powder

The sol-gel method is a common method for synthesizing powders in the liquid phase. This method has many advantages, such as the uniform mixing of reactants at the molecular level, low reaction temperature, and easy reaction. Therefore, it is also often used in the preparation of lithium silicate powder. It has been found that it is very important to select appropriate raw materials when preparing lithium silicate powder. The study found that the sol-gel method synthesized lithium silicate materials. Using tetraethyl orthosilicate as the silicon source, lithium hydroxide and lithium ethoxide as the lithium source, and synthesized lithium silicate powder according to different Li/Si ratios, it was found that when lithium ethoxide was used as the lithium source, Li/Si = 2, the product contains 94% Li2SiO3 and 6% Li2Si2O5 phase; and when lithium hydroxide is the lithium source, when Li/Si=2, there are only 55% Li2SiO3 in the product, and no pure Li2SiO3 phase is obtained. . The study found that lithium carbonate and TEOS were used as raw materials to synthesize pure Li2SiO3, Li2Si2O5 and Li4SiO4 powders by sol-gel method at 650~700 °C. Using TEOS and lithium ethoxide as raw materials and using alcohol-water mixture as solvent, pure Li2SiO3 powder with a particle size of only 5nm~10nm was synthesized by sol-gel method at 40 °C. The results show that: when the temperature is 40℃, the thermal stability of the obtained nano Li2SiO3 powder is very good, and the phase change does not occur even when the temperature rises to 850℃.

What is a lithium silicate aqueous solution?

In addition, the aqueous solution of lithium polysilicate is also called lithium water glass, also referred to as lithium silicate. Lithium silicate materials have many excellent properties, such as good tritium solubility, mechanical properties, physical and chemical stability, and compatibility with structural materials, so they are widely used. For example: As a coating base material, it can be used for ships, offshore engineering and building material coatings; as a surface treatment agent, it can be used for gloss retention of handicrafts, decorations, radios, plastic films, etc.; as an adhesive, it can be used for asbestos, Glass, TV phosphors, wood and car clutches, etc. It is particularly noteworthy that in recent years, lithium silicate materials have potential application prospects in new energy, environmental protection and other fields, such as: can be used in lithium-ion battery materials, CO2 adsorption materials, and nuclear value-added reactor materials, etc. s concern.

 

Application of lithium silicate aqueous solution

Due to the unique properties of lithium silicate aqueous solution, it has a wide range of uses. As a coating base material, water can be used as a solvent to form a coating film. In addition to the general properties of inorganic coatings, such as heat resistance, non-combustibility, radiation resistance, and non-toxicity, it also has self-drying properties, heat resistance up to 1000 ° C, and wear resistance. , Moisture resistance, weather resistance, good resistance to dry and wet alternation, excellent water resistance and so on. It can be used in offshore engineering, oil pipelines, ships, bridges and architectural coatings and coatings for building materials, such as bathrooms, kitchens, toilets, buildings, various components, as well as cement, concrete, asbestos tiles, aluminium, iron, wood materials, synthetic resins, ceramics, etc., especially suitable for humid environments and water-resistant decorative coatings.

 

As an adhesive, it can be used in wood, paper, plastic, glass, metal, concrete, brick, and asbestos, as well as a corrugated box, fiberboard, insulation board, TV fluorescent powder, automobile brake and clutch, etc.

As a surface treatment agent, it can be directly applied to the metal surface, used as an antirust liquid on the steel surface, as a corrosion inhibitor for metal components such as accordions, radios, instruments, etc., and for gloss and colour retention of non-ferrous metal decorations, daily necessities, and handicrafts. ; Coated on glass, can form a surface coating with excellent light transmission and low reflectivity; Coated on the galvanized iron sheet, it will not corrode in salt water; Coated on plastic film, can improve its moisture barrier and gas barrier properties, etc..

 

Although lithium silicate has been widely used in traditional fields, the preparation technology and performance research of lithium silicate is still very limited, which is far from meeting the needs of new energy and environmental protection. As people pay more and more attention to "century problems" such as the energy crisis and the greenhouse effect, lithium silicate materials will have greater development in the next few years.

 

Lithium Silicate supplier

Mis-asia is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Zinc sulfide, nitride powder, Zinc sulfide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Lithium Silicate, you are welcome to contact us or inquire any time.

 

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