| 摘要 |
<p>The device comprises a crucible with a support, a heater and at least one heat-insulating screen, wherein, according to the invention, the heater is made of a starting flexible carbon-bearing material in the form of a cylinder whose ends are fixed between coaxially arranged rigid rings of carbon material that are connected to a power supply. And, the heater is made so that the wall thereof has its thickness determined from the relationship: <DF> delta . rho - c = 500 to 8500 J/m<2>. </DF> K, where: <??> delta - heater wall thickness, m; rho - density of the material the heater is made of, kg/m<3>; and c - specific heat of the material the heater is made of (at working temperature), J/kg.K. <IMAGE></p> |
