Note: Melting silicon in graphite crucible (material testing)
Objective:
Melting ~ 2.1 oz (0.7g) silicon for a material testing application
End Product:
Materials experiment
Equipment:
Ambrell 6 kW induction heating system, equipped with a remote workhead containing two 1.0μF capacitors for a total of 0.5μF
An induction heating coil designed and developed specifically for this application.
Materials:
~ 2.1 oz (0.7 g) silicon, graphite crucible 2.03 in (51.6 mm) OD, 1.02 in (25.9 mm) high with a wall thickness of .125 in (3.2 mm)
insulation
Temperature:
2552 °F (1400 °C)
Frequency:
196 kHz
Testing:
A four turn helical coil is used to heat the crucible. The crucible is wrapped with a layer of insulation and placed into the coil. Power is applied and the crucible reaches the required 2552 °F (1400 °C) in 1 minute and 12 seconds.
The customer is developing a university lab experiment to melt silicon and is still developing the process. Ambrell equipment was recommended for the process by fellow coworkers that previously used Ameritherm equipment. Ambrell's lab proved the silicon can be melted in a graphite crucible and the melt temperature can be easily controlled using a temperature controller to control the power supply. The small remote workhead with the EASYHEAT 6 kW makes the system set up appropriate for a laboratory environment.
Benefits:
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Fast, controllable and accurate heat
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Repeatable results
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Even distribution of heating
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