Quartz evaporating dishes, also known as fused silica evaporating dishes or clear quartz evaporation basins, are essential labware for high-temperature sample concentration, crystallization, and ashing procedures. These evaporating dishes are manufactured from high-purity fused quartz (>99.99% SiO₂), providing exceptional thermal shock resistance and chemical inertness that make them indispensable in analytical chemistry and materials research.
Applications & Usage Scenarios
Quartz evaporating dishes are widely employed across demanding laboratory and industrial settings:
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Analytical Chemistry: Concentration of acid-digested solutions and evaporation of solvents prior to trace element analysis.
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Materials Science: High-temperature crystallization studies, calcination of precursor powders, and phase transformation research.
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Metallurgy & Ashing: Ash determination and high-temperature sample preparation where contamination must be avoided.
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Semiconductor & Electronics: Ultra-clean processes requiring minimal background contamination.
These fused silica evaporation basins excel in applications involving aggressive acids (HCl, HNO₃, H₂SO₄) and thermal cycling where standard borosilicate or porcelain dishes fail.
Material Properties & Construction
Our evaporating dishes are fabricated from transparent fused quartz (fused silica), a material renowned for its extraordinary thermal and chemical stability.
| Property | Value |
|---|---|
| SiO₂ Purity | >99.99% (4N) |
| Continuous Use Temperature | Up to 1200°C (recommended <1000°C) |
| Coefficient of Thermal Expansion | 5.5×10⁻⁷ /K |
| Thermal Conductivity | 1.38 W/m·K |
| Chemical Resistance | Inert to most acids (except HF), alkalis, and organic solvents |
| Optical Transparency | High transmittance across UV-Vis-IR spectrum |
| Density | 2.2 g/cm³ |
Quartz glass evaporating dishes exhibit a thermal expansion coefficient of approximately 5.5×10⁻⁷/K, which is about 15 times lower than borosilicate glass, granting them exceptional thermal shock resistance—they can be transferred directly from high temperatures to cold water without cracking.
The material is chemically inert to virtually all acids regardless of concentration, except hydrofluoric (HF) acid and hot phosphoric acid. It also resists attack from most alkalis and organic reagents, ensuring sample purity during evaporation and concentration.
Product Advantages
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Ultra-Low Contamination: >99.99% SiO₂ purity ensures negligible background contribution during trace analysis.
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Exceptional Thermal Shock Resistance: Low thermal expansion prevents cracking under rapid temperature cycling.
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Broad Chemical Compatibility: Resistant to concentrated acids (excluding HF) and most laboratory reagents.
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High Optical Clarity: Transparent quartz construction allows real-time visual monitoring of evaporation and crystallization processes.
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Long Service Life: Superior durability compared to porcelain or borosilicate alternatives under repeated heating cycles.
Technical Specifications
| Capacity (mL) | Outer Diameter (mm) | Height (mm) | Bottom Shape |
|---|---|---|---|
| 10 | 40 | 18 | Flat / Round |
| 15 | 50 | 25 | Flat / Round |
| 25 | 50 | 25 | Flat |
| 45 | 60 | 30 | Flat |
| 50 | 65 | 33–35 | Flat / Round |
| 60 | 70 | 35 | Flat |
| 90 | 80–85 | 42–45 | Flat / Round |
| 100 | 90 | 45 | Flat |
| 150 | 90 | 45 | Flat / Round |
| 170 | 95–100 | 55 | Flat |
| 300 | 120 | 60 | Flat |
| 320 | 115 | 65 | Flat |
| 450 | 150 | 75 | Flat |
| 600 | 140 | 80 | Flat |
| 1500 | 190 | 100 | Flat |
Available in both flat-bottom and round-bottom configurations. Dishes with pouring spouts are also available upon request.
Custom Dimensions: Non-standard sizes and special shapes can be manufactured to meet specific laboratory requirements. Please contact us for customization inquiries.
Quality Standards & Compliance
Our quartz evaporating dishes are manufactured in accordance with applicable industry standards:
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JC/T 654-2011 — Quartz Glassware Evaporating Dish (China Industry Standard for laboratory transparent quartz evaporating dishes).
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DIN 12336 — Flat bottom evaporating basins (German standard for laboratory glassware).
Customer Case Example
Analytical Chemistry Laboratory — Trace Metal Analysis
A U.S.-based analytical laboratory previously using borosilicate evaporating dishes reported 0.3 ppb iron (Fe) contamination during trace metal analysis. After switching to high-purity quartz evaporating dishes, the Fe background level was reduced to below 0.02 ppb, resulting in a 93% improvement in detection accuracy for ICP-MS applications.
Available Aliases
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Fused silica evaporating dish
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Clear quartz evaporation basin
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Quartz glass evaporating dish
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High-purity quartz evaporation dish
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Laboratory quartz evaporating dish
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Transparent quartz evaporating dish
