SP7TC 7KW Induction Heating System with Temperature Control, 80mm OD Quartz Tube, Up to 1900ºC for Melting and Sintering
The SP7TC system is engineered for laboratory-scale melting, sintering, and melt infiltration of metallic alloys with melting points below 1900ºC. It is particularly suited for processes requiring controlled atmospheres such as vacuum or protective gas environments. The system integrates a 7KW induction heater with a quartz tube chamber and graphite crucible assembly, enabling efficient and uniform heating of samples.
This compact system includes a temperature controller with automatic PID tuning and programmable segments for precise heating and cooling profiles. The quartz tube chamber, with an 80 mm outer diameter, is equipped with stainless steel flanges, valves, and vacuum ports to maintain controlled atmospheres. A recirculating water chiller and vacuum pump are included to support stable operation and atmosphere control.
Key Features
- 7KW induction heater with adjustable output frequency from 30 to 80 kHz and 80% duty cycle.
- Temperature controller with PID auto-tuning, 30 programmable segments, and ±5ºC accuracy over 1000ºC to 2000ºC range.
- 80 mm OD quartz tube chamber with stainless steel hinged and fixed flanges, needle valves, thermocouple feedthrough, and KF-25 vacuum port.
- High purity graphite crucible (1.5″ OD x 1.25″ ID x 3.75″ deep) with graphite felt insulation and double-layer refractory liners.
- Included 58 L/min recirculating water chiller and UL certified double-stage rotary vane vacuum pump (156 L/min) for atmosphere and temperature stability.
- Mobile steel frame cart with surface area for heater and quartz tube assembly.
- Safety features including automatic water pressure, over-temperature, overload protection, and thermocouple failure detection.
Technical Specifications
| Parameter | Specification |
|---|---|
| Induction Heater Power | 7 KW max input |
| Voltage & Frequency | 208-240V AC, 50/60 Hz, Single Phase |
| Output Frequency | 30 – 80 kHz adjustable |
| Duty Cycle | 80% |
| Temperature Range | 1000ºC to 2000ºC continuous |
| Temperature Accuracy | ±5ºC |
| Heating Rate | Up to 10ºC/s (1000-1200ºC), 8ºC/s (1200-1500ºC), 3-6ºC/s (1500-1700ºC) |
| Thermocouple Type | Type C |
| Quartz Tube Dimensions | 80 mm OD x 72 mm ID x 365 mm length |
| Graphite Crucible Size | 1.5″ OD x 1.25″ ID x 3.75″ deep (~35 ml max load) |
| Water Chiller Flow Rate | 16 L/min, temperature range 5-30ºC |
| Vacuum Pump Capacity | 156 L/min double-stage rotary vane, vacuum level ~5×10⁻² torr |
| Safety Protections | Water pressure, over-temperature, overload, thermocouple failure |
Typical Applications
Ideal for melting and sintering new metallic alloys, melt infiltration processes, and research requiring controlled atmosphere heating up to 1900ºC. Suitable for vacuum or protective gas environments with precise temperature control.
Configuration & Operating Notes
The system includes a complete refractory assembly made of alumina for crucible support and insulation. The quartz tube is sealed with stainless steel flanges featuring thermocouple feedthroughs and vacuum ports. A pressure regulator must be installed on the input gas tank to maintain output pressure below 3 PSI with continuous gas flow. Gas flow rates should be limited to under 200 ml/min. Overpressure or heating without gas flow can damage the system. Optional pressure sensors are available for enhanced vacuum monitoring. Higher vacuum levels can be achieved with an optional turbopump.
