| 摘要 |
The device according to the present invention comprises a furnace ( 10 ) provided with heating means allowing said material to be crystallised to be rendered liquid, then to be cooled until it progressively solidifies. The device also comprises reception means ( 20 ) of the material ( 21 ) disposed in the furnace, fixed relative to the furnace and situated such that the material is in the intermediary zone. The heating means ( 11, 12, 13 ) supply three heating zones: a hot zone ( 16 ), an intermediary zone ( 15 ) and a cold zone ( 14 ). Thermally conductive means ( 17 ) are disposed between the reception means ( 20 ) and the heating means ( 11, 12, 13 ) and extend from the cold zone as far as the hot zone.
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