Chemically pure, optically clear, dimensionally stable. Fused quartz combines extreme hardness, low expansion and broad optical transmission from UV to IR.
Used for: lab tubes & crucibles · investment-casting shrouds · glass-manufacturing rollers · semiconductor wafer carriers · UV/IR optics
Fused quartz is an industrial raw material used to make refractory shapes such as crucibles, trays, shrouds and rollers for several high-temperature thermal processes including steelmaking, investment casting and glass manufacture. Quartz refractory shapes have excellent thermal-shock resistance and are chemically inert to most components and compounds including almost all acids.
Quartz offers a diversity of properties: extreme hardness, very low coefficient of thermal expansion, resistance to high temperature, high chemical purity, high corrosion resistance, extensive optical transmission from ultra-violet to infra-red, excellent electrical insulation, and remarkable stability under atomic bombardment.
Anderman supplies quartz in translucent and transparent forms. Translucent fused-silica tubes are normally used to replace electric elements in room heaters, industrial furnaces and similar applications; transparent grades are reserved for optical and high-purity semiconductor service.
Small laboratory equipment, large wafer carriers, large-diameter process tubes, UV-transmissive optics, infrared windows, and refractory shapes used in steelmaking, investment casting and glass manufacture.
| Grade | Purity | Max temp | Density | Hardness | Typical use | Find products |
|---|---|---|---|---|---|---|
| Translucent fused silica | High | 1100 °C continuous | 2.2 | — | General industrial — heater tubes, refractory shapes | → Find products |
| Transparent fused silica | Very high (low OH) | 1100 °C continuous | 2.2 | — | Optical, semiconductor and high-purity service | → Find products |
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Industrially, the terms are often used interchangeably. Strictly, natural quartz is crystalline SiO₂; fused quartz and fused silica are the amorphous glassy form produced by melting either natural quartz or synthetic silica. Anderman’s industrial quartz is the fused (vitreous) form.
At sustained temperatures above ~1100 °C, vitreous silica slowly converts back to crystalline cristobalite, becoming opaque and brittle. Keep continuous service below this point to maintain mechanical integrity.
Yes — the very low CTE (~0.55 × 10⁻⁶/K) means quartz tolerates rapid temperature changes that would crack most ceramics. Avoid prolonged service above 1100 °C to prevent devitrification.
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