ALS Glass Carbon

Product Description

It combines properties such as glass-like hardness with those of graphite. However, unlike graphite, it has a highly disordered microstructure consisting of basal and edge planes.

This results in the great variety of its positive material properties.
Glassy carbon is very resistant. Corrosion resistance is given in air up to approx. 500°C and under vacuum or inert gas up to over 3000°C. Unlike most ceramic or metallic materials, the compressive, tensile and flexural strength of glassy carbon increases as the temperature rises. At approx. 2400°C, glassy carbon has approx. twice the strength of glassy carbon at room temperature. Due to its high thermal shock resistance, rapid heating and cooling times are also possible.
Due to its high purity, chemical resistance and very low permeability to gases and solutions, glassy carbon is ideally suited for use as a working electrode in electrochemistry.
Due to its high hardness and strength, glassy carbon can be polished very well and produces very good surfaces. The good electrical conductivity, good di-electrical behaviour and good bio-compatibility complete the positive properties.

 

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Specifications

Form Rods and plates Film

Density 1.42 g/cm³ 1.54 g/cm³

Combustion residue < 100 ppm < 100 ppm

Temperature limit in vacuum 3000 °C 1000 °C

Porosity 0% 0%

Gas permeability rate 10⁻⁹ cm²/s 10⁻¹¹ cm²/s

Hardness 230 HV 340 HV

Flexural strength 260 N/mm² 210 N/mm²

Compressive strength 480 N/mm² 580 N/mm²

Modulus of elasticity 35 kN/mm² 35 kN/mm²

Coefficient of thermal expansion (20–200 °C) 2.6 × 10⁻⁶ 1/K 3.5 × 10⁻⁶ 1/K

Thermal conductivity (at 30 °C) 6.3 W/(m•K) 4.3 W/(m•K)

Specific resistance 45 µΩ•m 50 µΩ•m

Options and Accessories

• Working
electrodes• Flow cell electrodes

• Rotating electrodes

Applications