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Glass powder
Glass powder is a new type of environmentally friendly, highly transparent, inorganic, non-metallic functional powder material that appears as a white powder.
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Glass powder is a new type of environmentally friendly, highly transparent, inorganic, non-metallic functional powder material. It appears as a white powder. In its production, high-purity silica (SiO₂) and alumina (Al₂O₃) are used as raw materials, which undergo an ultra-clean manufacturing process to yield a glass-like transparent powder with a disordered structure and stable chemical properties. Glass powder is an ultra-weather-resistant material that exhibits excellent acid and alkali resistance, chemical inertness, and a low coefficient of thermal expansion.
Here is a detailed introduction to it:
Definition: Glass powder is an amorphous, hard particle produced by grinding after quenching.
Appearance: Typically appears as a white powder, and under a microscope exhibits a clear, transparent or milky-white, transparent state.
Main components: Typically include silicon dioxide (SiO₂), aluminum oxide (Al₂O₃), titanium dioxide (TiO₂), and so on. There are also glass powders whose main components are lead oxide or zirconium oxide.
Mohs hardness: Generally around 7, indicating relatively high hardness.By particle size, glass powders can be classified into ultrafine glass powder, fine glass powder, medium glass powder, and coarse glass powder. Ultrafine glass powder has extremely small particle sizes and exhibits excellent dispersibility and transparency; coarse glass powder, on the other hand, offers superior wear resistance and impact resistance.
According to their chemical composition, glass powders can be classified into silicate glass powders, borate glass powders, aluminosilicate glass powders, phosphate glass powders, and others. Among these, silicate glass powders exhibit high chemical and thermal stability; borate glass powders have high refractive indices and excellent wear resistance.
By application: it can be categorized into glass powder for coatings, glass powder for plastics, glass powder for rubber, glass powder for electronics, and so forth.
Performance Features
Physical Properties: The glass powder exhibits excellent transparency, a uniform particle size distribution, and outstanding dispersibility and compatibility. Its refractive index is similar to that of most synthetic resins, enabling coatings to achieve high transparency.
Chemical Properties: It exhibits resistance to acids and alkalis, antioxidant properties, and corrosion resistance, and is unlikely to react with other substances.
Mechanical Properties: With high hardness, when added as a filler to organic resins, it can enhance the hardness and toughness of topcoats and improve the scratch resistance of the coating film.
Other properties: Glass powder also exhibits excellent insulation and flame-retardant characteristics. It can reduce the peak exothermic temperature of the resin curing reaction, relieve internal stresses in the cured material, and prevent cracking.
Application areas
In the coatings field: It is a commonly used filler for furniture paints, decorative paints, and other coatings, capable of enhancing properties such as film hardness, transparency, and weather resistance.
Electronics field: Used for passivation and encapsulation of semiconductor devices such as thyristors and power transistors, it can also be employed as an electronic packaging material, offering excellent insulation properties and thermal stability.
In the ceramics field: As an釉料 additive, it can enhance the gloss and wear resistance of glazes and is also suitable for applications such as ceramic glass screen printing.
In the field of construction materials: It can be used to prepare materials such as glass fiber-reinforced cement and glass fiber-reinforced plastics, enhancing the wear resistance and corrosion resistance of construction materials.
Other fields: It can also be used in cosmetics, dental restorations, environmentally friendly materials, and other areas—for example, as an adsorbent in cosmetics and as a filling material in dental restorations.
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