Description
Specifications Table
Product Name – Glassy carbon rod, 6mm (0.24in) dia, type 1
Quantity/Pack Size – 50mm, 100mm
Form – Solid rod
Grade – Type 1 (high purity)
Application – Electrochemical cells, high-temperature furnaces, corrosion-resistant components
Product Overview
The glassy carbon rod (6mm diameter, type 1) is a high-performance material engineered for extreme thermal and chemical resistance, making it indispensable in advanced laboratory setups. Unlike traditional graphite, its non-porous, impermeable structure ensures minimal gas adsorption and superior dimensional stability even at temperatures exceeding 3000°C in inert atmospheres. The type 1 grade guarantees ultra-low impurity levels (<10 ppm metallic contaminants), critical for sensitive electrochemical measurements where trace elements could skew results. Its isotropic properties—uniform electrical conductivity (≈30 S/cm) and thermal conductivity (5-10 W/m·K)—eliminate directional inconsistencies common in other carbon forms. The rod’s machinable nature allows customization for electrodes, crucibles, or furnace linings without compromising structural integrity. Its resistance to acids (including aqua regia) and alkalis further extends its utility in aggressive chemical environments. The 6mm diameter balances mechanical strength with precision handling, while the 50mm and 100mm lengths cater to both compact setups and larger-scale experiments. Note that while glassy carbon exhibits exceptional oxidation resistance, prolonged exposure to air above 600°C may require protective atmospheres to prevent gradual surface erosion.
FAQs
1. Can this glassy carbon rod be used in molten salt electrolysis?
Yes, its chemical inertness and high-temperature stability make it suitable for molten salt applications, though compatibility should be verified for specific salt compositions like fluorides or chlorides that may react at extreme temperatures.
2. What’s the maximum current density this rod can handle in electrochemical cells?
The rod supports current densities up to 1 A/cm² in aqueous solutions, but this depends on electrode geometry, electrolyte conductivity, and cooling conditions. For organic solvents or non-aqueous systems, lower densities (0.1–0.5 A/cm²) are recommended to avoid localized heating.
3. How does type 1 glassy carbon differ from type 2 in terms of porosity?
Type 1 has a denser, less porous structure (porosity <0.1%) compared to type 2 (porosity ≈0.5–1%), resulting in higher mechanical strength and lower permeability to gases or liquids, which is critical for vacuum or high-pressure applications.
4. Is this rod compatible with induction heating systems?
Glassy carbon’s low electrical resistivity makes it poorly suited for direct induction heating. However, it can be indirectly heated by placing it within an induction-heated susceptor (e.g., graphite or tungsten) for uniform temperature distribution.
5. What’s the typical surface roughness (Ra) of these rods, and can it be polished further?
As-supplied rods have an Ra of ≈0.8–1.2 µm. For smoother finishes (Ra <0.1 µm), diamond polishing pastes (1–0.25 µm grit) can be used, but avoid abrasives with metallic contaminants that may embed in the surface.
