Equipment
Our standard product is LPHT furnaces for high temperature treatment of diamond materials. These furnaces are commonly used for commercial color treatment of brown and off-color CVD diamonds and in the research of materials exposed to high temperature annealing.
Our production also includes flat furnaces. Flat furnaces are furnaces with two flat horizontal heaters positioned at a distance one over another. Flat furnaces are used for processing of flat disk-like samples.
![Image of a cylindrical LPHT Furnace](img/FurnaceCylL.jpg)
Cylindrical Furnaces
Furnaces LPHT-20V, LPHT-30V and LPHT-40V are high temperature furnaces with cylindrical heaters and cylindrical sample containers. The cylindrical containers can be made of graphite and/or boron nitride.
Cylindrical furnaces are the best choice for the processing of small and medium size samples fitting the container size. Cylindrical containers can accommodate up to 100 carats of individual diamonds.
Contact us to find out more and discuss custom solutions tailored to your needs.
Technical Specifications & Parameters
Parameters
Width: 500 mm
Depth: 600 mm
Height: 1000 mm
Weight: 50 kg
Vacuum: the level of vacuum in cold state is from 1e-2 mbar (low vacuum model) to 5e-5 mbar (high vacuum model)
Sample Container
Diameter: from 20 mm to 38 mm
Height: from 20 mm to 50 mm
Material: graphite and / or boron nitride
Electrical Power
One phase 208-240V, 30A
Three-phase variant available upon request
Cooling
Water-based cooling system
Pressure: 2 atm at 10 litre/min
Processing Temperature
Range: 400°C - 2100°C (higher temperatures upon request)
Temperature ramp up/down at high temperatures is about 200°C per minute
Processing Time
Treatment time: 1 min to several days
Typical cycle time for color treatment of CVD diamond: 20 minutes
![Image LPHT Furnance](img/FurnaceFlatL.jpg)
Flat Furnace
The standard flat furnace LPHT-70F can process disks of diameter up to 70 mm and thickness up to 10 mm. A common application of flat furnaces LPHT-70F is the treatment of as-grown “pancakes” of CVD diamond blocks merged together. LPHT treatment of “pancake” allows to improve color of all blocks in “pancake” and to reduce stress between the blocks simultaneously in one process.
Contact us to find out more and discuss custom solutions tailored to your needs.
Technical Specifications & Parameters
Parameters
Width: 500 mm
Depth: 600 mm
Height: 1000 mm
Weight: 55 kg
Vacuum: in cold state vacuum level is from 1e-2 (low vacuum model) to 5e-5 (high vacuum model)
Sample Container
Diameter: from 60 mm to 80 mm
Height: from 10 mm to 20 mm
Material: graphite and / or boron nitride
Electrical Power
One phase 208-240V, 30A
Three-phase variant available upon request
Cooling
Water-based cooling system
Pressure: 2 atm at 10 litre/min
Processing Temperature
Range: 400°C - 2100°C (max. temperature may vary depending on the model)
Temperature ramp up/down at high temperatures is about 200°C per minute
Processing Time
Treatment time: 1 min to several days
Typical cycle time for color treatment of CVD diamonds: 20 minutes