Transparent Quartz Sand
Overview
Transparent Quartz Sand is a specialized form of silica sand characterized by its high clarity and purity. It is mined or synthetically processed to achieve a SiO2 content of 99% or higher, making it ideal for applications requiring optical transparency or chemical inertness. The material is graded by particle size (typically 20-200 mesh) and iron content, with premium grades used in precision glass manufacturing. Its natural hardness (7 on the Mohs scale) and thermal stability contribute to diverse industrial uses.
Physical and Chemical Properties
The sand exhibits exceptional thermal shock resistance due to its low coefficient of thermal expansion (0.0000055/°C). Its refractive index (1.544) and UV transparency make it valuable for optical applications. Chemically, it is inert to most acids except hydrofluoric acid. The absence of crystalline silica (when processed correctly) minimizes health risks, though dust control remains critical during handling.
Main Applications
In glass production, it serves as the primary raw material for float glass, fiberglass, and laboratory glassware requiring high light transmission. Foundries use it as molding sand for metal casting due to its thermal stability. Water treatment plants utilize its uniform particle size (0.5-1.2mm) in multi-media filters. Decorative applications include epoxy resin fillers, aquascaping substrates, and architectural concrete finishes where visual clarity is prioritized.
Safety and Storage
Although non-toxic, prolonged exposure to respirable crystalline silica dust may cause silicosis. OSHA requires dust suppression systems and N95 respirators in workplaces with exposure above permissible limits (50μg/m³). Bulk storage should avoid contamination from moisture or foreign particles. Super sacks with polyethylene liners are recommended for long-term preservation of optical-grade material.
B2B Procurement Guide
Industrial buyers should specify: SiO2 content (99-99.8%), Fe2O3 levels (<0.01% for optical grades), mesh size tolerance (±5%), and acid solubility (<1%). Testing certificates for heavy metals (Pb, Cd) are required for food-contact applications. Leading producers include Unimin Corporation (USA), Sibelco (Belgium), and regional suppliers in Southeast Asia. Container-load purchases (20-25 metric tons) typically offer 10-15% cost savings over bagged quantities.
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