Quartz / Fused Silica
Quartz and fused silica are high-purity SiO2 glasses with exceptional thermal shock resistance, optical transmission and chemical inertness. Used in lighting, sensors, process equipment and specialty optics for automotive and electronics supply chains.
Overview
Natural quartz crystal and synthetic fused silica (amorphous SiO2) deliver optical and thermal properties unavailable from conventional soda-lime automotive glass. Fused silica offers a very low coefficient of thermal expansion, high softening temperature and, in synthetic grades, deep-UV transparency critical for lithography, UV curing lamps and specialty sensors. Automotive-adjacent uses include high-intensity discharge and UV lamp envelopes, optical windows for inspection and sensing, and process tubes/fixtures in electronics and battery materials manufacturing. Structural vehicle glazing remains float glass; this entry covers technical quartz/fused silica as a glass/ceramic-class specialty material spanning raw crystal feedstock and processed fused products.
Automotive Applications
Similar Materials
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Properties
Category
Type
Technical Glass
Available Colors
Available Forms
Key Properties
- Near-pure SiO2 — very low thermal expansion
- Outstanding UV transmission (synthetic fused silica)
- High softening temperature vs soda-lime glass
- Excellent chemical purity and inertness
- Thermal shock resistant
- Distinct from soda-lime automotive glazing
Technical Specifications
Density
~2.20 g/cm³
Tensile Strength
Brittle glass — design by strength/fracture toughness; typical flexural strengths vary widely with surface finish
Temperature Resistance
Softening ~1600–1700°C for fused silica; continuous use often limited by fixtures/coatings well below that
Sustainability
Sustainability Rating
High-purity fused silica melting is energy-intensive. Clean scrap can be remelted into lower grades. Natural quartz mining impacts are site-specific. Not a substitute for recyclable float glass in BIW glazing.