Heat treatment furnace BV-HTRV series
crystal growthtubularelectric

heat treatment furnace
heat treatment furnace
heat treatment furnace
heat treatment furnace
heat treatment furnace
heat treatment furnace
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heat treatment, crystal growth
Heat source
Maximum temperature

1,600 °C, 1,700 °C, 1,800 °C (2,912 °F)


The BV-HTRV is as a special crystal growing furnace according to the Bridgman method. The Bridgman method uses a pre-synthesized material that moves slowly through a temperature gradient. The melted material moves through a decreasing temperature gradient and forms a single crystal. The BV-HTRV is a tube furnace which is mounted on a device engineered specifically for the Bridgman method. As a standard, the HTRV 70-250 or the HTRV 100-250 are used as a tube furnace mounted on the pulling device. In principal, every tube furnace can be mounted on the pulling device. Most common are the two models, HTRV 70-250 and the HTRV 100-250. The short heated length is an advantage as it creates an ideal gradient for the Bridgman method. The temperature decreases towards the bottom of the furnace. The pulling device moves the sample with an adjustable speed toward the lower temperature. Next to the sample is a thermocouple in order for an accurate reading of the sample temperature. Both, sample and probe thermocouple are attached to the bottom pulling device. The movement of the sample can be fast for loading and unloading or with a user defined speed for crystal growth. A ceramic tube surrounds the probe thermocouple and sample. At both ends of the tube, a water cooled flange is connected. At the top of the system, the tube and flange are fixed. A bellow connects the tube and pulling device at the bottom of the furnace. The bellow is extended during the downward movement of the sample. Operation of the unit can be achieved under vacuum conditions.


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