BARS apparatus

BARS (or "split sphere", transliteration from Russian: БАРС abbreviation of Russian: Беспрессовая Аппаратура Высокого Давления «РАЗРЕЗНАЯ СФЕРА», (bespressovaya apparatura vysokogo davleniya «razreznaya sfera»), "press-free high-pressure setup «split sphere»") a high-pressure high-temperature apparatus usually used for growing or processing minerals, especially diamond and boron nitride.

[2][1] The BARS technology was invented around 1989–1991 by the scientists from the Institute of Geology and Geophysics of the Siberian Branch of the Academy of Sciences of the USSR.

[2] In the center of the device, there is a ceramic cylindrical reaction cell of about 2 cm3 in size.

The cell is placed into a cubic-shaped pressure-transmitting material, which is pressed by elements made from cemented carbide (VK10 hard alloy).

After mounting, the whole assembly is locked in a disc-type barrel with a diameter ~1 meter.

Schematic of a BARS system.
Pressure chamber.
Two BARS devices, one open for loading or unloading and the other closed.