Method for realizing lower auxiliary heating in high-temperature furnace without lower auxiliary heating tungsten heater

• Main Authors: WANG YINGMIN, CHENG HONGJUAN, SHI YUEZENG, WANG ZENGHUA, ZHANG LI, YIN LIYING
• Format: Patent
• Language: Chinese; English
• Published: 11.07.2023
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The invention discloses a method for realizing lower auxiliary heating in a high-temperature furnace without a lower auxiliary heating tungsten heater, which is characterized in that a circular heater is vertically placed in the high-temperature furnace, a circular tungsten support piece is coaxially placed in the circular heater, and the lower end of the circular tungsten support piece and the lower end of the circular heater are positioned on the same horizontal plane; a tungsten crucible is placed on the circular tungsten supporting piece; a plurality of slotted holes are formed in the upper end and the lower end of the circular tungsten supporting piece and are in one-to-one correspondence; and when the heater works at the rated power of 30 kW, the temperature of the bottom of the tungsten crucible reaches 2280-2300 DEG C. According to the invention, gas in the high-temperature furnace in a near-normal-pressure state generates convection to heat the bottom of the crucible by utilizing a chimney effect, so