Lithium Silicate

Lithium Silicate (Li₂SiO₃) is an inorganic compound formed by lithium oxide (Li₂O) and silicon dioxide (SiO₂). It is commonly used in various industrial applications, including ceramics, glass production, and in some battery technologies. Its properties, such as high thermal stability, low expansion, and excellent strength at elevated temperatures, make it a valuable material for several specialized uses.

Chemical Composition and Structure:

Formula: Li₂SiO₃, consisting of two lithium (Li) atoms, one silicon (Si) atom, and three oxygen (O) atoms.

Structure: Lithium silicate crystallizes in a layered structure, contributing to its thermal and mechanical properties.

Solid-State Stability: It remains stable under normal atmospheric conditions but can undergo transformations under extreme heat or pressure.

Physical Properties:

Chemical formula：Li2SiO3

Molar mass：89.566 g/mol

Appearance：colorless crystals

Density：2.52 g/cm3

Melting point：1,201 °C (2,194 °F; 1,474 K)

Solubility in water：insoluble

Refractive index (nD)：1.584

Crystal structure：orthorhombic

Applications:

Ceramic Materials: Lithium silicate is used in the production of ceramic glazes, where it improves strength, hardness, and thermal stability of the final product. It is particularly useful in creating glazes for high-performance ceramic tiles, dinnerware, and glass ceramics.

Glass Industry: Lithium silicate is used in the glass industry to make glass ceramics, as it contributes to the formation of low-expansion glasses with improved mechanical properties. It is also employed in the production of heat-resistant glasses, such as those used in cooking appliances and laboratory equipment.

Battery Technologies: In some advanced battery technologies, lithium silicate is being explored as an additive or component in lithium-based batteries, particularly to enhance performance and stability.

Refractory Materials: Due to its high thermal stability, lithium silicate is used in the production of refractories, such as furnace linings, where resistance to heat is critical.

Cement: Lithium silicate has been studied for use in specialty cements, as it can improve durability and reduce cracking in concrete, especially when exposed to high-temperature conditions.

Sealing and Coatings: It can also be used as a component in sealants and coatings for high-temperature applications, particularly in the automotive and aerospace industries.