| 摘要 |
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: <?in-line-formulae description="In-line Formulae" end="lead"?>delta.rho.c=500 to 8500 J/m<SUP>2</SUP>.K, where: <?in-line-formulae description="In-line Formulae" end="tail"?> delta-heater wall thickness, m; rho-density of the material the heater is made of, kg/m<SUP>3</SUP>; and c-specific heat of the material the heater is made of (at working temperature), J/kg.K.
|
