Glassy Carbon (CAS 68647-86-9): Comprehensive Technical Guide
Table of Contents
1. Product Specifications & Comparative Analysis
| Parameter | SIGRADUR® K | SIGRADUR® G | Standard Graphite |
|---|---|---|---|
| Max Operating Temp | 1,000°C | 3,000°C | 2,500°C |
| Density (g/cm³) | 1.42 | 1.48 | 1.6-1.9 |
| Thermal Expansion (10⁻⁶/K) | 3.5 | 3.2 | 4.5-6.0 |
| Electrical Conductivity (S/m) | 1.5×10⁴ | 1.2×10⁴ | 2.5×10⁴ |
| Surface Porosity | Zero Open Porosity | 5-15% | |
Key Differentiator: Unparalleled chemical inertness against HF, HNO₃, and molten metals up to 2,700K, outperforming conventional ceramics and platinum alloys.
2. Key Applications & Functional Advantages
2.1 Electrochemical Systems
- Working Electrodes: -1V to +1.5V vs SCE with 0.02μA/cm² background noise
- Mercury Film Substrates: 99.999% purity for trace metal detection (ppb-level Pb/Cd/Zn)
2.2 High-Temperature Processing
- Czochralski Crucibles: 1,600°C Si crystal growth with <0.1ppm contamination
- Thermal Shock Resistance: Survives 1,200°C→25°C quenching cycles (10x alumina)
2.3 Semiconductor Manufacturing
- GaAs Synthesis Vessels: 99.9999% purity for III-V compound production
- Coating Technology: 50μm glassy carbon layers reduce graphite dust by 98.7%
3. Implementation Scenarios
3.1 Voltammetric Heavy Metal Analyzer
Glassy carbon electrodes enabled 0.1ppb detection limits for Pb²⁺ in drinking water via anodic stripping voltammetry, complying with EPA Method 7063.
3.2 Dental Alloy Processing
Custom crucibles reduced Co-Cr melting time from 45 to 12 minutes while eliminating metal adhesion issues in casting.
4. Verified Client Success Stories
Case 1: Semiconductor Leader (Taiwan)
- Challenge: Graphite particle contamination in GaN epitaxial growth
- Solution: 200μm SIGRADUR® G coating on susceptors
- Result: Defect density reduced from 10⁵ to 10² cm⁻²
Case 2: European Research Facility (Germany)
- Challenge: Electrode degradation in supercritical CO₂ systems
- Solution: 3mm-thick glassy carbon electrodes
- Result: Operational lifespan extended from 30 to 1,200 cycles
5. Request Customized Solutions
Our engineering team provides tailored configurations including:
- Electrode Dimensions: 1-50mm diameter with custom surface finishes (Ra ≤ 0.05μm)
- Coating Services: 10nm-2mm thickness control (±5%)
- Material Grades: Research (99.9%) to Semiconductor (99.9995%) purity
Contact our material specialists:
Email: info@vivalr.com
Tel: (86) 15866781826



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