High-Purity 99.9% Platinum Crucibles with Lid - Laboratory Grade
Product Overview
Our premium 99.9% platinum crucibles represent the gold standard in high-temperature laboratory analysis equipment. Manufactured from ultra-pure platinum, these crucibles offer unparalleled chemical resistance, thermal stability, and measurement accuracy for critical analytical procedures. Each crucible comes with a precisely fitted lid for controlled atmosphere applications.
Available Sizes & Specifications
| Capacity (ml) |
Diameter (mm) |
Height (mm) |
Weight (g) |
| 5ml |
20 |
15 |
15-20 |
| 10ml |
25 |
20 |
25-35 |
| 15ml |
30 |
22 |
35-50 |
| 25ml |
35 |
25 |
50-70 |
| 50ml |
45 |
30 |
80-120 |
| 100ml |
55 |
35 |
150-200 |
| Custom |
Custom |
Custom |
Varies |
Material Properties & Quality Assurance
Platinum Purity & Composition
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Purity Level: 99.95% minimum platinum content
-
Trace Elements: <0.05% (primarily rhodium, palladium)
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Certification: Each batch comes with purity certificate
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Standards Compliance: Meets ISO 9001 quality standards
Physical Properties
| Property |
Value |
Significance |
| Melting Point |
1,772°C (3,222°F) |
Extreme temperature stability |
| Density |
21.45 g/cm³ |
High material integrity |
| Thermal Conductivity |
71.6 W/m·K |
Uniform heat distribution |
| Coefficient of Expansion |
8.8 × 10⁻⁶/°C |
Dimensional stability |
| Hardness |
40 HV (Vickers) |
Durability and longevity |
Advanced Features & Benefits
Superior Chemical Resistance
-
Acid Resistance: Unaffected by hydrochloric, nitric, and sulfuric acids
-
Alkali Resistance: Resistant to sodium and potassium hydroxides
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Molten Salt Compatibility: Ideal for flux fusion applications
-
Oxidation Resistance: Maintains integrity in oxidizing atmospheres
Thermal Performance
-
Operating Range: Room temperature to 1,600°C continuous use
-
Thermal Shock Resistance: Withstands rapid temperature changes
-
Heat Distribution: Uniform temperature across crucible surface
-
Cooling Characteristics: Predictable and controlled cooling rates
Comprehensive Applications
Analytical Chemistry
-
Gravimetric Analysis: Ash content determination in organic materials
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Sample Decomposition: Wet ashing and dry ashing procedures
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Fusion Procedures: Alkali fusion for refractory sample preparation
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High-Temperature Synthesis: Preparation of ceramic and glass materials
Metallurgical Applications
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Fire Assaying: Precious metal analysis and recovery
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Alloy Preparation: Small-scale metal melting and alloying
-
Slag Analysis: High-temperature metallurgical studies
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Refining Processes: Purification of precious metals
Materials Science Research
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Crystal Growth: Single crystal preparation
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Sintering Studies: Ceramic and powder metallurgy research
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Phase Diagram Studies: High-temperature equilibrium investigations
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Catalyst Preparation: Synthesis of platinum group metal catalysts
Gemstone and Jewelry Industry
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Gemstone Treatment: Heat treatment of precious stones
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Metal Melting: Jewelry casting and refining
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Alloy Development: Custom jewelry alloy preparation
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Quality Testing: Purity assessment of precious metals
Design Features & Construction
Crucible Design
-
Wall Thickness: Optimized for strength and heat transfer
-
Base Design: Flat bottom for stable positioning
-
Pouring Spout: Precision-formed lip for controlled pouring
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Surface Finish: Mirror-polished interior for easy cleaning
Lid Specifications
-
Fit: Precision-machined for tight seal
-
Handling: Integrated lifting feature for safety
-
Ventilation: Optional vent hole for gas release
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Material: Same high-purity platinum as crucible
Comparison with Alternative Materials
| Material |
Max Temp (°C) |
Chemical Resistance |
Cost |
Applications |
| Platinum |
1,772 |
Excellent |
High |
Precision analysis, research |
| Alumina |
1,700 |
Good |
Low |
Routine analysis |
| Zirconia |
2,200 |
Good |
Medium |
High-temp applications |
| Quartz |
1,100 |
Limited |
Very Low |
Low-temp work |
| Graphite |
3,000 |
Poor |
Medium |
Inert atmosphere only |
Usage Guidelines & Best Practices
Pre-Use Preparation
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Initial Cleaning: Clean with dilute nitric acid, rinse thoroughly
-
Conditioning: Heat gradually to operating temperature
-
Inspection: Check for any surface defects or contamination
-
Weighing: Record empty crucible weight for accurate calculations
Operating Procedures
-
Sample Loading: Fill to maximum 2/3 capacity
-
Heating Rate: Gradual temperature increase (10-20°C/min)
-
Atmosphere Control: Use appropriate gas environment
-
Safety: Always use platinum-tipped tongs for handling
Maintenance & Care
-
Cleaning Protocol: Aqua regia for stubborn residues
-
Storage: Clean, dry environment away from reactive materials
-
Inspection Schedule: Regular examination for wear or damage
-
Reconditioning: Professional refinishing services available
Quality Control & Testing
Manufacturing Quality
- Each crucible individually inspected for defects
- Dimensional accuracy verified to ±0.1mm
- Purity testing performed on every production batch
- Surface finish quality assessment
Performance Testing
- Thermal cycling tests to ensure durability
- Chemical resistance verification
- Leak testing for lid seal integrity
- Long-term stability studies
Ordering Information & Customization
Standard Configurations
All standard sizes are available with matching lids. Custom configurations include:
- Special dimensions for specific applications
- Modified lip designs for specialized pouring
- Perforated lids for controlled atmosphere work
- Engraved identification markings
Frequently Asked Questions
Q: Why is platinum preferred over other crucible materials?
A: Platinum offers the unique combination of extreme temperature resistance, complete chemical inertness, and dimensional stability that makes it ideal for precision analytical work where sample contamination must be eliminated.
Q: How do I determine the right size for my application?
A: Consider your typical sample size (fill to maximum 2/3 capacity), heating method, and whether you need room for sample expansion during heating.
Q: Can damaged platinum crucibles be repaired?
A: Yes, minor dents and scratches can often be repaired. Severely damaged crucibles can be recycled, and we offer credit toward new purchases.
Q: What's the difference between 99.9% and 99.95% purity?
A: Our crucibles use 99.95% purity platinum, which provides better chemical resistance and longevity compared to 99.9% alternatives, making them ideal for critical analytical applications.
Technical Support & Services
Expert Consultation
- Application-specific recommendations
- Size and configuration selection guidance
- Protocol development assistance
- Troubleshooting support
Additional Services
- Custom engraving and marking
- Certification and calibration services
- Platinum recycling and credit program
- Maintenance and reconditioning services
Why Choose NEXACULE Platinum Crucibles?
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Proven Quality: Used by leading research institutions worldwide
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Competitive Pricing: Direct manufacturer pricing with no intermediaries
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Fast Delivery: Most sizes in stock for immediate shipment
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Expert Support: Technical assistance from platinum specialists
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Satisfaction Guarantee: 30-day return policy for unused items
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Global Shipping: Worldwide delivery with proper documentation
Certifications & Compliance
- ISO 9001:2015 Quality Management
- ASTM standards compliance
- Certificate of Analysis provided
- RoHS compliant materials
- Conflict-free platinum sourcing
Platinum Crucibles Feature:
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High Chemical Stability – Resistant to strong acids, alkalis, and molten salts, ensuring sample purity in high-temperature experiments.
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Excellent High-Temperature Resistance – With a melting point of 1772°C, they remain stable in extreme heat without deforming.
-
Good Thermal Conductivity – Ensures even heat distribution for precise chemical reactions.
-
High Purity (99.9%+) – Prevents contamination in sensitive processes like semiconductor manufacturing.
-
Strong Mechanical Strength – Durable and resistant to impact, reducing replacement costs.
Platinum Crucibles Applications:
Platinum crucibles are vital in high-precision, high-temperature applications due to their durability and purity.
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Chemical Analysis – Used for ashing, melting, and dissolving samples in labs.
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Metallurgical Industry – Essential for high-purity metal extraction and alloy production.
-
Materials Science – Ideal for synthesizing nanomaterials, ceramics, and composites.
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Gemstone Processing – Safely melts and purifies gemstones without chemical reactions.
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Research & Education – Widely used in chemistry, metallurgy, and materials science experiments.
