VTF-1700X-AD-J Atmosphere-Controlled Bottom-Loading Melting Furnace with Stirring and Secondary Charge Feeding, Up to 1700°C
The VTF-1700X-AD-J is engineered for precise melting of specialty glass and novel alloy materials requiring controlled atmospheres up to 1700°C. Its bottom-loading design accommodates heavy loads up to 100 kg within an 8-liter chamber, facilitating efficient handling of crucibles and samples. This furnace integrates stirring and secondary charge feeding capabilities, enabling uniform melt composition and in-process doping during high-temperature operations.
Temperature control is achieved via six replaceable MoSi2 heating elements, supporting a working range from 600°C to 1700°C in air or oxygen environments, with a reduced range of 1000°C to 1600°C under inert gases. The system maintains a vacuum level around 500 torr at elevated temperatures, suitable for atmosphere-sensitive processes though not for high vacuum applications. The furnace’s airtight double-layer steel casing, combined with water-cooled front door and air-cooled shell, ensures stable atmosphere control and thermal management.
Wichtigste Merkmale
- Bottom-loading box furnace with 200 x 200 x 230 mm chamber size and 100 kg max load capacity
- Integrated stirring fixture with adjustable speed from 0 to 50 rpm; stirring blades made from BN or alumina
- Secondary charge feeder installed atop the furnace for adding up to three types of doping elements during melting
- Six MoSi2 heating elements (30 x 360 mm) providing uniform heating and replaceability
- Dual B-type thermocouples for precise temperature control and over-temperature alarm
- Built-in PC control with Eurotherm 3000 temperature controllers, programmable segments, and pressure regulation
- Vacuum pump included for chamber purging and maintaining vacuum below 760 torr; inert gas flow meters for atmosphere control
- Safety alarms for over-temperature, pressure deviations, and low water flow
Technische Daten
| Parameter | Spezifikation |
|---|---|
| Stromversorgung | AC 208-240V, single-phase, 50/60 Hz, 8 kW |
| Heating Chamber Size | 200 x 200 x 230 mm (8 x 8 x 8 inches), 8 liters |
| Maximale Belastung | 100 kg |
| Heizelemente | 6 x MoSi2 (30 x 360 mm), replaceable |
| Betriebstemperaturbereich | 600°C – 1700°C in air/oxygen; 1000°C – 1600°C in inert gas |
| Temperaturgenauigkeit | ±0.1°C |
| Erwärmungsgeschwindigkeit | 10°C per minute |
| Thermocouples | Dual B-type for control and alarm |
| Rührgeschwindigkeit | 0 – 50 rpm, adjustable |
| Pressure Control Range | -0.06 to 0.03 MPa |
| Vakuumniveau | Approx. 500 torr at high temperature |
| Dimensions (Furnace) | 800 x 750 x 1500 mm (L x W x H) |
| Dimensions (Control Unit) | 600 x 600 x 750 mm |
Typische Anwendungsbereiche
This furnace is ideal for melting and processing specialty glasses, advanced alloys, and materials requiring precise atmosphere control and doping during melting. It suits research and development labs focused on new material synthesis, glass formulation, and alloy development under controlled atmospheres.
Hinweise zur Konfiguration und zum Betrieb
The furnace includes a built-in PC for temperature and pressure control, with programmable temperature segments and safety alarms. The stirring fixture is liftable and fitted with blades made from boron nitride or alumina. A secondary charge feeder allows addition of up to three doping elements during melting. A vacuum pump and gas flow meters enable atmosphere purging and pressure regulation. A recirculating water cooling system (58 L/min) is required but not included to cool the sealing flange and chamber case.
Note that the furnace is not designed for high vacuum applications; vacuum levels are limited to about 500 torr at high temperature. Use of 5% H2 + Ar gas mixtures can improve oxidation control. For oxygen-sensitive materials, a hydrogen furnace is recommended.
