China Road Marking Glass Beads Factory - Trusted Suppliers for High-Quality Reflective Materials
The following chemical composition values are typical reference ranges for soda-lime road marking glass beads. Actual values may vary slightly according to raw materials, production batch, customer standard, and customized grade. WANCHENG MINERAL can provide batch inspection documents according to customer requirements.
Chemical Composition Reference Table
| Chemical Component | Typical Range | Function |
|---|---|---|
| SiO2 | 65-75% | Main glass network former |
| Na2O | 10-18% | Improves melting and glass formation |
| CaO | 5-12% | Improves hardness and stability |
| MgO | 0-5% | Improves durability |
| Al2O3 | 0-5% | Improves chemical stability |
| K2O | 0-3% | Auxiliary flux component |
| Fe2O3 | ≤ 0.5% | Controlled for appearance and transparency |
Frequently Asked Questions (FAQ)
What is the primary chemical component in soda-lime road marking glass beads?
Silicon Dioxide (SiO2) is the primary component, typically accounting for 65% to 75% of the total composition. It acts as the fundamental glass network former, ensuring mechanical durability and structural stability.
Why is Iron Oxide (Fe₂O₃) content strictly limited to ≤ 0.5%?
Iron Oxide (Fe2O3) is strictly controlled to maintain maximum optical clarity, high retroreflectivity, and a neutral white appearance, preventing undesired yellow or green tinting in road markings.
How do Calcium Oxide (CaO) and Magnesium Oxide (MgO) impact bead performance?
CaO (5-12%) and MgO (0-5%) serve as key stabilizing agents that enhance physical hardness, weather resistance, and abrasion resistance under heavy traffic loads.
What functions do Sodium Oxide (Na₂O) and Potassium Oxide (K₂O) serve?
Na2O (10-18%) and K2O (0-3%) act as essential fluxing components that lower the melting point during manufacturing, facilitating optimal glass formation and high roundness sphericity.
Can the chemical specifications be customized for specific project standards?
Yes, actual chemical ratios may vary slightly according to raw materials, customized grades, and international highway standards (e.g., AASHTO, EN 1423/1424, BS 6088).
Does WANCHENG MINERAL provide batch test certificates?
Yes, WANCHENG MINERAL can provide official batch inspection documents (COA/Test Reports) and quality compliance verification according to customer project requirements.
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