High purity transparent quartz crucible for laboratory applications
Transparent quartz crucible with excellent optical clarity
Cylindrical transparent quartz crucible with smooth surface finish
Cylindrical transparent quartz crucibles for laboratory applications
Square Transparent quartz crucible in laboratory material analysis application

Transparent Quartz Crucibles for Laboratory for Laboratory & Material Analysis -TOQUARTZ®​

TOQUARTZ® Transparent quartz crucibles manufactured with high-purity SiO2 content of 99.98% minimum. These crucibles offer exceptional thermal stability, excellent optical transparency, and superior electrical insulation properties. Highly resistant to acids, bases, and corrosive environments, making them ideal for laboratory instruments, optical instruments, and material analysis tests.
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Properties of Transparent Quartz Crucibles

TOQUARTZ transparent quartz crucibles are manufactured using high-purity silica, creating laboratory vessels with exceptional performance characteristics.

High Temperature Resistance

Operating temperature exceeds 1100°C with minimal thermal expansion (coefficient of 0.56×10-6/°C at 25-300°C). This superior thermal shock resistance makes these crucibles ideal for rapid heating and cooling cycles common in research and testing environments.

Optical Transparency

Excellent light transmission properties with 92-93% transparency in the visible spectrum (450-780nm) at 1.0mm thickness. This optical clarity allows for direct visual monitoring of reactions and processes inside the crucible, critical for optical instrument development.

Chemical Resistance

Resistant to most acids, bases, and corrosive environments. Only hydrofluoric acid and hot phosphoric acid will cause significant degradation, making these crucibles suitable for a wide range of chemical reactions and analytical processes.

Clear quartz crucibles for high temperature laboratory applications
TOQUARTZ® Transparent Quartz Crucibles
  • Excellent Thermal Stability
  • Optical Transmission
  • Superior Chemical Resistance

Dimensions & Technical Specifications of Transparent Quartz Crucibles

TOQUARTZ® offers a comprehensive range of standard transparent quartz crucibles in various shapes and sizes to meet diverse laboratory and material testing requirements.

Size of of Arc-Shaped Quartz Crucibles

Model Capacity (ml) Outer Dia. (mm) Bottom Dia. (mm) Height (mm) Wall Thickness (mm) Purity
AT-QTZ-B001 5 25 18 31 1.5 99%-99.99%
AT-QTZ-B002 5 25 18 40 1.5 99%-99.99%
AT-QTZ-B003 10 30 23 42 2 99%-99.99%
AT-QTZ-B004 10 30 23 53 2 99%-99.99%
AT-QTZ-B005 20 35 25 45 2 99%-99.99%
AT-QTZ-B006 20 35 25 59 2 99%-99.99%
AT-QTZ-B007 30 40 30 54 2 99%-99.99%
AT-QTZ-B008 30 40 30 68 2 99%-99.99%
AT-QTZ-B009 50 45 33 63 2 99%-99.99%
AT-QTZ-B010 50 45 33 75 2 99%-99.99%
AT-QTZ-B011 100 54 39 84 2 99%-99.99%
AT-QTZ-B012 100 54 39 100 2 99%-99.99%
AT-QTZ-B013 150 60 43 90 2 99%-99.99%
AT-QTZ-B014 150 60 43 105 2 99%-99.99%
AT-QTZ-B015 200 69 46 91 2.5 99%-99.99%
AT-QTZ-B016 200 69 46 110 2.5 99%-99.99%
AT-QTZ-B017 250 75 50 110 2.5 99%-99.99%
AT-QTZ-B018 250 75 50 130 2.5 99%-99.99%
AT-QTZ-B019 300 80 51 111 2.5 99%-99.99%
AT-QTZ-B020 300 80 51 130 2.5 99%-99.99%
AT-QTZ-B021 500 88 67 137 2.5 99%-99.99%
AT-QTZ-B022 500 88 67 160 2.5 99%-99.99%

Size of of Cylindrical Quartz Glass Crucibles

Model Capacity (ml) Outer Dia. (mm) Height (mm) Wall Thickness (mm) Purity
AT-QTZ-A001 0.7 20 4 1.5 99%-99.99%
AT-QTZ-A002 0.6 12 8 1.5 99%-99.99%
AT-QTZ-A003 0.9 12 12 1.5 99%-99.99%
AT-QTZ-A004 0.8 12 10 1.5 99%-99.99%
AT-QTZ-A005 0.9 20 5 1.5 99%-99.99%
AT-QTZ-A006 0.7 12 10 1.5 99%-99.99%
AT-QTZ-A007 1.4 18 8 1.5 99%-99.99%
AT-QTZ-A008 1.3 11 20 1.5 99%-99.99%
AT-QTZ-A009 1.6 12 20 1.5 99%-99.99%
AT-QTZ-A010 1.7 9 40 1.5 99%-99.99%
AT-QTZ-A011 1.5 13 25 1.5 99%-99.99%
AT-QTZ-A012 1.3 10 25 1.5 99%-99.99%
AT-QTZ-A013 5 20 20 1.5 99%-99.99%
AT-QTZ-A014 2 30 5 1.5 99%-99.99%
AT-QTZ-A015 6 22 20 1.5 99%-99.99%
AT-QTZ-A016 3.5 18 18 1.5 99%-99.99%
AT-QTZ-A017 4 16 28 1.5 99%-99.99%
AT-QTZ-A018 0.5 15 5 1.5 99%-99.99%
AT-QTZ-A019 1.2 15 10 1.5 99%-99.99%
AT-QTZ-A020 2.6 15 20 1.5 99%-99.99%
AT-QTZ-A021 3.7 17 21 1.5 99%-99.99%
AT-QTZ-A022 5.2 14 44 1.5 99%-99.99%
AT-QTZ-A023 6 32 10 2 99%-99.99%
AT-QTZ-A024 2 10 40 2 99%-99.99%
AT-QTZ-A025 6 15 50 2 99%-99.99%
AT-QTZ-A026 8 28 17 2 99%-99.99%
AT-QTZ-A027 6 35 8.5 2 99%-99.99%
AT-QTZ-A028 7 16 50 2 99%-99.99%
AT-QTZ-A029 12 54 8 2 99%-99.99%
AT-QTZ-A030 6 17 37 2 99%-99.99%
AT-QTZ-A031 9 16 60 2 99%-99.99%
AT-QTZ-A032 7.5 20 30 2 99%-99.99%
AT-QTZ-A033 7 22 25 2 99%-99.99%
AT-QTZ-A034 10 25 25 2 99%-99.99%
AT-QTZ-A035 9 20 40 2 99%-99.99%
AT-QTZ-A036 12 19 58 2 99%-99.99%
AT-QTZ-A037 16 30 28 2 99%-99.99%
AT-QTZ-A038 17 47 13 2 99%-99.99%
AT-QTZ-A039 20 23 60 2 99%-99.99%
AT-QTZ-A040 17 30 30 2 99%-99.99%
AT-QTZ-A041 24.5 25 60 2 99%-99.99%
AT-QTZ-A042 23 35 30 2 99%-99.99%
AT-QTZ-A043 24 28 58 2 99%-99.99%
AT-QTZ-A044 28 35 35 2 99%-99.99%
AT-QTZ-A045 30 28 58 2 99%-99.99%
AT-QTZ-A046 35 30 60 2 99%-99.99%
AT-QTZ-A047 39 36 45 2 99%-99.99%
AT-QTZ-A048 37 40 35 2 99%-99.99%
AT-QTZ-A049 36 26 82 2 99%-99.99%
AT-QTZ-A050 43 40 40 2 99%-99.99%
AT-QTZ-A051 41 40 40 2.5 99%-99.99%
AT-QTZ-A052 54 40 50 2 99%-99.99%
AT-QTZ-A053 52 40 50 2.5 99%-99.99%
AT-QTZ-A054 63 40 60 2.5 99%-99.99%
AT-QTZ-A055 130 40 120 2.5 99%-99.99%
AT-QTZ-A056 150 60 60 2.5 99%-99.99%

Size of of Square Fused Quartz Crucibles

Model Length (mm) Width (mm) Height (mm) Wall Thickness (mm) Purity
AT-QTZ-C001 50 10 10 2-3 99%-99.99%
AT-QTZ-C002 100 10 10 2-3 99%-99.99%
AT-QTZ-C003 50 15 10 2-3 99%-99.99%
AT-QTZ-C004 100 15 10 2-3 99%-99.99%
AT-QTZ-C005 50 20 15 2-3 99%-99.99%
AT-QTZ-C006 100 20 15 2-3 99%-99.99%
AT-QTZ-C007 50 30 20 2-3 99%-99.99%
AT-QTZ-C008 100 30 20 2-3 99%-99.99%
AT-QTZ-C009 50 40 25 2-3 99%-99.99%
AT-QTZ-C010 100 40 25 2-3 99%-99.99%
AT-QTZ-C011 50 50 30 2-3 99%-99.99%
AT-QTZ-C012 100 50 30 2-3 99%-99.99%
AT-QTZ-C013 50 50 50 2-3 99%-99.99%
AT-QTZ-C014 100 100 30 2-3 99%-99.99%
AT-QTZ-C015 100 100 50 2-3 99%-99.99%
AT-QTZ-C016 100 100 100 2-3 99%-99.99%
AT-QTZ-C017 200 100 50 2-3 99%-99.99%

Technical Specifications of Transparent Quartz Crucibles

Chemical Composition
& OH Content		 (ppm) Cr Ge Fe Mg Ti Ca Al Na Li K OH
20 0.4 1.5 0.4 100 1 16 2.3 0.5 2 ＜25
Physical Properties Property Value Property Value Property Value Property Value Property Value Property Value
Density (20°C) 2.2 × 10³ kg·m⁻³ Coefficient of expansion (25-300°C) 0.56 × 10⁻⁶ °C⁻¹ Softening point 1630°C Annealing point 1180°C Strain point 1100°C Young’s modulus 7.3 × 10⁵ Pa
Spectral Transmission at 1.0mm Thickness (%) ＜220nm 230-280nm 290-330nm 350nm 450nm 550nm 590nm 780nm
0 ＜15 0 15 88 92 93 93
Note: We offer custom dimensions, shapes, and specifications to meet your specific requirements. Contact our engineering team for consultation.
Sent Customized Requirements

TOQUARTZ® Solving Challenges with Transparent Quartz Crucibles

Transparent Quartz Crucibles for Precision Laboratory Equipment

Laboratory equipment manufacturers require high-purity crucibles for integration into analytical instruments. In this application, crucibles must maintain dimensional stability, chemical inertness, and thermal resistance while offering precise optical properties. Any variations in quality can affect instrument calibration and measurement accuracy.

Key Advantages

  • TOQUARTZ® crucibles maintain dimensional tolerance within ±0.05mm for critical instrument integration.
  • Each crucible is tested to ensure ≥92% light transmission at 550nm for optical path consistency.
  • Wall thickness variation is controlled within 0.03mm across production batches to ensure calibration repeatability.
Find My Solution

TOQUARTZ® solution

A German analytical instrument OEM reported calibration drift due to inconsistent crucible wall thickness, causing ±0.2mm deviation in optical alignment.

TOQUARTZ® supplied crucibles with certified ±0.05mm tolerance and ≤0.03mm wall deviation, restoring calibration stability and reducing instrument rejection rate by 87%.

Transparent Quartz Crucibles for Academic Research Applications

Trace metal contamination in crucibles (e.g., Fe, Al, Na) can interfere with sensitive spectroscopic or catalytic experiments, leading to false positives or irreproducible results in peer-reviewed research.

Key Advantages

  • TOQUARTZ® crucibles are batch-tested with ICP-MS to ensure Fe content ≤1.5ppm for trace analysis compatibility.
  • Hydroxyl content is stabilized below 25ppm to prevent interference in high-temperature gas-phase reactions.
  • Each batch includes CoA verifying Al content ≤16ppm, suitable for organometallic and photonic research.
Find My Solution

TOQUARTZ® solution

A US-based university lab encountered inconsistent catalytic activity due to Fe contamination (>5ppm) from local suppliers.

TOQUARTZ® provided crucibles with ICP-MS verified Fe ≤1.5ppm and full CoA, enabling reproducible results and successful publication in ACS Catalysis.

Transparent Quartz Crucibles for High Temperature Analytical Testing

In high-temperature TGA/DSC or thermal decomposition testing (>1000°C), crucibles often deform or fracture due to thermal stress, leading to sample loss, equipment contamination, and test interruption.

Key Advantages

  • TOQUARTZ® crucibles maintain structural integrity up to 1150°C under continuous load.
  • Ultra-low expansion coefficient minimizes stress during rapid heating cycles in analytical instruments.
  • Each crucible is annealed above 1180°C to relieve internal stress and prevent microcrack propagation.
Find My Solution

TOQUARTZ® solution

A Canadian testing lab reported 12% crucible failure rate during 1100°C TGA runs, causing 3–4 days/month of downtime.

TOQUARTZ® supplied annealed crucibles with verified deformation resistance at 1150°C, reducing failure rate to <1% and restoring full testing throughput.

Customization Services for TOQUARTZ® Transparent Quartz Crucibles

TOQUARTZ® offers comprehensive customization capabilities for fused quartz curved plates to meet your exact specifications and application requirements.

Dimensional Customization

  • Custom diameters, height and wall thickness
  • Special height-to-diameter ratios
  • Specialized shapes beyond standard offerings

Material Modifications

  • Grade selection (JGS-1, JGS-2, JGS-3)
  • Specific OH content requirements
  • Controlled impurity levels for specialized applications
  • UV or IR transmission optimization

Special Features

  • Added spouts or pouring lips
  • Custom lids or covers
  • Surface treatments (polishing, etching)
  • Specialized markings or graduations

Material Specification Note

When requesting custom transparent quartz crucibles, please specify your material requirements. TOQUARTZ offers JGS-1, JGS-2, and JGS-3 grade quartz with varying spectral transmission characteristics. For applications with specific wavelength requirements, please include this information in your inquiry for optimal material selection.

TOQUARTZ® Customization Process

Requirements Consultation

Submit your technical requirements or drawings. Our engineers will review and provide feedback on feasibility.

Design & Quotation

Receive detailed design specifications and pricing within 48 hours for your approval.

Production & Delivery

After approval, manufacturing begins with rigorous quality control. Typical custom orders ship within 7-14 days.

Usage Guidelines for Transparent Quartz Crucibles

Proper handling, usage, and maintenance of transparent quartz crucibles will maximize their performance and service life. Follow these guidelines to ensure optimal results and prevent premature failure or contamination issues in laboratory and analytical applications.

Handling and Storage

  • Handle with clean gloves to prevent fingerprint contamination
  • Store in clean, dust-free environment
  • Avoid direct contact with abrasive surfaces
  • Use dedicated storage containers for unused crucibles
  • Keep separated from other labware to prevent scratches

Chemical Compatibility

  • Compatible with most acids except hydrofluoric acid
  • Avoid hot phosphoric acid which can cause erosion
  • Alkali metals and their oxides can react at high temperatures
  • Rinse thoroughly after use with corrosive materials
  • Prevent cross-contamination by dedicated use per application

Temperature Control

  • Avoid rapid temperature changes exceeding 200°C/minute
  • Pre-heat large crucibles gradually to prevent thermal shock
  • Do not exceed maximum operating temperature (1100°C)
  • Allow to cool naturally after high-temperature use
  • Use appropriate thermal insulation for temperature stability

Cleaning & Maintenance

  • Clean with dilute acids followed by deionized water rinse
  • For organic residues, use acetone followed by alcohol rinse
  • Avoid abrasive cleaning materials that can scratch surface
  • Air dry or use clean, low-lint tissues
  • Inspect regularly for cracks or damage before reuse

Need Technical Consultation?

Our engineers provide free project consultation for transparent quartz crucible applications.
Get expert advice on material selection, design specifications, and process optimization for your laboratory needs.
Contact Our Engineer

Why Partner with TOQUARTZ

Direct Factory Advantage

As a direct manufacturer, we can cut out the numerous intermediate links.

Engineering Expertise

Technical team guides clients from material selection to design optimization, translating specs into deliverables.

Flexible Manufacturing

Handling standard & custom orders via small-batch expertise and prototyping rigor to meet urgent deadlines.

Quality
Assurance

Pre-shipment 3-step validation:
1. dimensional accuracy,
2. material purity ,
3. performance thresholds

Global Supply Chain

Reliable global logistics to industrial hubs (DE/US/JP/KR priority) with trackable milestones.

Releted Products

As a specialized manufacturer with direct factory capabilities, TOQUARTZ provides both standard and custom quartz solutions with engineering support throughout the specification and implementation process.

FAQ

Q: What is the maximum operating temperature for transparent quartz crucibles?

A: TOQUARTZ® transparent quartz crucibles can operate at temperatures up to 1100°C continuously. The strain point is 1100°C, the annealing point is 1180°C, and the softening point is 1630°C. For applications requiring temperatures above 1100°C, please consult with our technical team for specific recommendations.

A: TOQUARTZ® Quartz crucibles are resistant to most chemicals but are attacked by hydrofluoric acid (HF) and hot phosphoric acid. Alkali metals and their oxides can also react with quartz at high temperatures. For applications involving these substances, alternative materials should be considered.

A: Selection depends on your specific application requirements. Consider: (1) Temperature range, (2) Chemical environment, (3) Required capacity/dimensions, (4) Purity requirements, and (5) Optical properties needed. Our technical team can assist with selection based on your process parameters to ensure optimal performance.

A: Each batch undergoes comprehensive testing including: dimensional verification using precision measuring instruments, visual inspection for defects under polarized light, material composition analysis, thermal shock resistance testing, and for high-purity applications, trace element analysis using ICP-MS. Test certificates are available upon request.

A:For general cleaning, use a mild acid solution (except HF) followed by thorough rinsing with deionized water. For organic residues, clean with acetone followed by an alcohol rinse. Avoid abrasive cleaning methods that can scratch the surface. For stubborn deposits, a gentle soak in appropriate solvents is recommended rather than mechanical cleaning.

Contact our engineering team for technical consultation and pricing. We’ll help you select the optimal specifications for your application requirements.

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