Zirconium Silicate
What is Zirconium Silicate
Zirconium Silicate (ZrSiO₄) is a naturally occurring mineral composed of zirconium, silicon, and oxygen. It is known for its exceptional hardness, durability, high heat resistance, and chemical corrosion resistance. Produced by finely grinding zircon sand to achieve the desired particle size, major deposits are found in Australia and South Africa with annual global production exceeding one million tonnes.
Chemical Formula
ZrSiO₄
Key Properties
High Melting Point
With a melting point exceeding 2,550°C, it can withstand extreme temperatures in demanding applications.
Exceptional Hardness
With a hardness of 7.5 on the Mohs scale, it offers excellent wear and scratch resistance.
Chemical Stability
Insoluble in water, acids, alkalis, and aqua regia, providing superior chemical resistance.
High Refractive Index
With a refractive index of 1.93-2.01, it provides excellent opacity and whiteness in ceramic applications.
Industrial Applications
Zirconium Silicate is used in a wide range of industrial applications due to its exceptional properties.
Ceramics Industry
Used as an opacifier in ceramic glazes and tiles, enhancing whiteness, opacity, and glossy finish. It also improves mechanical strength and wear resistance of ceramic products.
Refractories
Essential for manufacturing refractory bricks used in steel and glass furnaces due to its excellent thermal stability and resistance to alkali corrosion.
Foundry Industry
Used in foundry molds and coatings due to its high-temperature resistance and non-reactivity with molten metals, ensuring smooth surface quality of castings.
Paints & Coatings
Acts as a filler material in paints, improving durability, opacity, and abrasion resistance. Ideal for high-wear surfaces and industrial coatings.
Glass Manufacturing
Enhances mechanical properties and thermal resistance of glass products, particularly useful in industrial glass and optical applications.
Abrasives
Used as an abrasive for polishing and grinding metal, stone, and ceramic surfaces due to its high hardness and fine finish capability.
Benefits of Zirconium Silicate
Enhances whiteness and opacity in ceramic glazes
Excellent thermal stability for refractory applications
Improves mechanical strength of products
Superior chemical corrosion resistance
Increases durability and product lifespan
Naturally abundant and sustainable material
Product Grades
Zirconium Silicate is available in various grades based on particle size and purity to meet different industrial requirements:
Zircon Flour (-200 mesh)
Particle size <75μm, used in ceramic frits, refractory coatings, and plastics.
Zircon Flour (-325 mesh)
Particle size <45μm, providing finer texture for high-quality glaze applications.
Premium Grade
High purity with ZrO₂+HfO₂ >65%, ideal for applications requiring superior quality.
