MEO Engineering Company, Inc.
High Technology on Small Scale Since 2004
290 Broadway
Suite 298
Methuen, MA 01844
ph: +1 978-305-0479
vray
Graphite-environment furnace for rapid (100°C/sec) ultra-high temperature (2400°C/4352°F) processing
Ultra-High Temperature (UHT) laboratory furnace with rapid heating rates of 100°C/Sec and maximum temperature up to 2400°C/4352°F operating in vacuum, argon, and hydrogen atmosphere within graphite heating environment.
Get to target temperature within 10 minutes!
High Temperature HTT-G furnaces are unique instruments designed for rapid high temperature processing of materials. Specific feature of HTT-G furnaces is that all parts working at high temperature in a wide range from 300°C (572°F) to 2400°C (4352°F) are made of graphite. Uniquely designed heating element enables rapid heating and cooling rates as fast as 100°C/second, and especially advantageous for processing of materials with poor stability at high temperatures. One example of such material is diamond, which undergoes graphitization when heated for prolonged time at temperatures over 1800°C. High temperature chamber of HTT-G furnaces is designed for work in vacuum and in atmosphere of non-oxidizing gasses (e.g. nitrogen, argon, hydrogen) and gaseous mixes .
Published Application Examples:
"Comparison of HPHT and LPHT annealing of Ib synthetic diamond" - Low Pressure High Temperature (LPHT) Treatment of synthetic CVD Diamond for clearing, spectral broadening, and luminescence enhancement purposes at temperatures up to 2000°C in vacuum and hydrogen atmosphere with minimal graphitization.
"Defect transformations in nitrogen-doped CVD diamond during irradiation and annealing" - Annealing of synthetic CVD Diamond for creation of stable luminescence centers
Specifications:
Min. Temp.: 300°C (572°F) Controllable
Max. Temp.: 2,000°C (3,632°F) Standard in Vacuum
Max Temp.: 2,400°C (4,352°F) UHT Option in Vacuum
Peak Heating Rate: 50°C/Sec (Standard in Vacuum)
Peak Heating Rate: 100°C/Sec (UHT Option in Vacuum)
Passive Cooling Rate: 10°C/Sec (Standard in Vacuum)
Active Cooling Rate: 70°C/Sec (Requires Argon connection)
Vacuum Level, LV Standard: 10E-2 Torr (Base @ Ambient Temp)
Vacuum Level, HV Option: 10E-4 Torr (Base @ Ambient Temp)
Vacuum Level, AHV Option: 10E-6 Torr (Base @ Ambient Temp)
Temperature Measurement: W-Re (Type C) thermocouple in graphite sheath
Gas Pressure: 0.1 mbar (75 mTorr) to 1200 mbar (900 Torr) with IGA and RGA options
Sample Container: D 1" (25 mm) x H 1" (25 mm) Cylinder Standard 
Sample Container: D 2" (50 mm) x H 2" (50 mm) Cylinder Custom
Dimensions: L 35" (80 cm) x W 25" (64 cm) x H 56" (142 cm)
Weight: 300lb (150kg)
Frame: Extruded Auminum with locking casters
Optional Features:
UHT option enables processing at temperatures up to 2,400°C (4,352°F) and rapid heating rates up to 100°C/Sec
Inert Gas Atmosphere (IGA) option enables sample processing in Nitrogen, Argon, Carbon Dioxide, and similar non-reactive gas atmosphere.
Reducing Gas Atmosphere (RGA) option requires HV or AHV vacuum hardware and enables sample processing in the atmosphere of Hydrogen and its mixtures with inert gases.
IGA and RGA options enable rapid cooling rates up to 70°C/Sec
Site and Shipping Requirements:
Power: 208 V (220 - 240 V) 60Hz (50Hz), 50 Amp
Cooling: Water 68-77F (20-25°C) 4GPM (15l/m) 12kW (3 Ton) capacity
Footrpint: 4' (1.2m) x 3' (1m)
Environment: 63°F - 95°F (17°C - 30°C), non-condencing humidity <75%
Outdoor Exhaust or Safety Exhaust Connection
Shipping Crate Dimensions: 39" (100cm) x 29" (75cm) x 61" (155cm)
Shipping Crate Weight: 600lb (300kg)
Applications
Earth Sciences
290 Broadway
Suite 298
Methuen, MA 01844
ph: +1 978-305-0479
vray