Quartz powder
is a silicon dioxide (SiO₂) powder processed from natural quartz ore through crushing, grinding, purification, and other techniques.Depending on purity, particle size, and crystal morphology, quartz powder can be categorized into various types including ordinary quartz powder, refined quartz powder, and fused silica powder, which find extensive applications across industries such as glass, ceramics, electronics, chemicals, coatings, rubber, foundry, and more.
I.Basic Properties
1.High Hardness and Wear Resistance
With a Mohs hardness of 7, it exhibits excellent compressive strength and abrasion resistance, making it suitable for composite materials requiring high mechanical performance.
2.High Purity (Especially in Electronics Grade)
Premium-grade quartz powder contains up to 99.9% to 99.99% SiO₂, with extremely low levels of impurities such as iron (Fe), sodium (Na), and aluminum (Al), meeting the stringent requirements of semiconductor and electronic packaging applications.
3.Excellent Chemical Stability
It does not react with most acids (except hydrofluoric acid), showing strong corrosion resistance and maintaining stability in harsh acidic or alkaline environments.
4.Low Coefficient of Thermal Expansion & High Thermal Stability
Remains structurally stable under significant temperature fluctuations, ideal for use in high-temperature functional materials.
5.Good Electrical Insulating Properties
An outstanding insulator, widely used in electronic components and high-voltage electrical equipment.
6.Superior Transparency (Crystal-Class Quartz)
Transparent high-purity quartz is used in manufacturing optical glass, UV-transmitting windows, and preforms for optical fibers.
II.Typical Application Fields
1.Glass Industry
A primary raw material for producing flat glass, bottle glass, specialty optical glasses, etc.
2.Ceramic Industry
Added to ceramic bodies to enhance plasticity, strength, and sintering performance; commonly used in tiles, sanitary ware, and industrial ceramic parts.
3.Electronics and Semiconductor Industry
- Used as filler in IC substrates and copper-clad laminates (CCL);
- Manufactured into quartz tubes, boats, crucibles;
- Applied as high-frequency insulators and precursors for piezoelectric ceramics.
4.Coatings and Paints
As a functional filler, improves coating hardness, wear resistance, weather resistance, and settling resistance.
5.Rubber and Plastic Modification
Enhances rigidity, dimensional stability, and surface gloss of composites.
6.Foundry Industry
Used in molding sands; its low thermal expansion and good permeability help prevent casting warping and cracking.
7.Artificial Stone and Flooring Materials
Such as quartz stone countertops and epoxy terrazzo flooring, providing aesthetic texture and high-wear-resistant surfaces.
8.Photovoltaics and New Energy
High-purity quartz is a critical raw material for solar-grade monocrystalline silicon growth, serving as the inner lining of quartz crucibles.
9.Cosmetics and Toothpaste
Micronized or submicron quartz powder acts as an abrasive in whitening toothpastes; also used for thickening and tactile modification in color cosmetics
