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CN-224218544-U - Graphite electrode for single crystal furnace and single crystal furnace

CN224218544UCN 224218544 UCN224218544 UCN 224218544UCN-224218544-U

Abstract

The utility model relates to the field of single crystal furnaces, in particular to a graphite electrode for a single crystal furnace and the single crystal furnace, which comprise an electrode body, wherein the electrode body comprises a heater connecting part and a diameter reducing part which are integrally structured, the diameter of the diameter reducing part is smaller than that of the heater connecting part, two ends of the electrode body are respectively provided with a first end and a second end, the heater connecting part is positioned at the first end, the first end is used for connecting a heater, and the second end is used for connecting an external electrode. A graphite electrode device for a single crystal furnace can reduce self resistivity and achieve the effects of energy conservation and consumption reduction when being actually arranged between a heater and an external electrode.

Inventors

  • WANG XINGLE
  • XU YAO
  • Qiao le

Assignees

  • 四川高景太阳能科技有限公司
  • 高景太阳能股份有限公司

Dates

Publication Date
20260508
Application Date
20250306

Claims (9)

  1. 1. The graphite electrode for the single crystal furnace comprises an electrode body (1), and is characterized in that the electrode body (1) comprises a heater connecting part (101) and a diameter reducing part (102) which are integrally structured, the diameter of the diameter reducing part (102) is smaller than that of the heater connecting part (101), two ends of the electrode body (1) are respectively provided with a first end (103) and a second end (104), the heater connecting part (101) is positioned at the first end (103), the first end (103) is used for being connected with a heater, and the second end (104) is used for being connected with an external electrode; the whole height range of the electrode body (1) is 300-305 mm, the thickness range of the heater connecting portion (101) is 8-12 mm, the diameter of the heater connecting portion (101) is 90mm, and the diameter range of the diameter reducing portion (102) is 55-65 mm.
  2. 2. The graphite electrode for a single crystal furnace according to claim 1, wherein a first mounting hole (105) is formed in an end face of the first end (103), and the first mounting hole (105) is used for connecting a heater.
  3. 3. The graphite electrode for a single crystal furnace according to claim 2, wherein a second mounting hole (106) is formed in an end face of the second end (104), and the second mounting hole (106) is used for connecting an external electrode.
  4. 4. A graphite electrode for a single crystal furnace according to claim 3, wherein the first mounting hole (105) is M36 3, The second mounting hole (106) adopts M45 3.
  5. 5. A graphite electrode for a single crystal furnace according to claim 3, wherein the electrode body (1) is provided with a channel (107) along the axial direction thereof, and two ends of the channel (107) are respectively communicated with the first mounting hole (105) and the second mounting hole (106).
  6. 6. The graphite electrode for a single crystal furnace according to claim 5, wherein at least one vent hole (108) is opened at a side portion of the electrode body (1), and the vent hole (108) is communicated with the channel (107).
  7. 7. The graphite electrode for a single crystal furnace according to claim 5, wherein the channel (107) is a circular channel (107), and the first mounting hole (105) and the second mounting hole (106) are collinear with the central axis of the channel (107).
  8. 8. The graphite electrode for a single crystal furnace according to claim 7, wherein the diameter of the channel (107) is in the range of 12-17 mm.
  9. 9. A single crystal furnace comprising the graphite electrode for single crystal furnace according to any one of claims 1 to 8.

Description

Graphite electrode for single crystal furnace and single crystal furnace Technical Field The utility model relates to the field of single crystal furnaces, in particular to a graphite electrode for a single crystal furnace and the single crystal furnace. Background With the rapid development of the photovoltaic industry, monocrystalline silicon materials are used as main raw materials of solar cells, and quality control in the preparation process is important. The single crystal furnace is a core device for preparing single crystal silicon materials, wherein a graphite electrode of a thermal field component is a key component in the single crystal furnace. The graphite electrode prepared by adopting the cold isostatic pressing M3 process and other advanced production processes has the characteristics of high strength, compact structure, good electrical conductivity, thermal conductivity and the like. The electrode is processed according to the accurate size and shape requirements by utilizing advanced cutting, grinding and other processing equipment, and the dimensional accuracy and form and position tolerance of the electrode are ensured by adopting three-coordinate measurement and other precise detection means, so that the product quality is ensured. As a conductor, the current of the external electrode is transmitted to the heater to provide the needed heat for the melting of the polysilicon. In the prior art, the diameter of a graphite electrode used in a single crystal furnace is 90mm, and in the growth process of single crystal silicon, the electric energy consumption of the single crystal furnace is increased and the heating cost is increased due to the fact that the specific resistance of the graphite electrode is relatively high due to the limitation of the physical properties of the graphite electrode along with the overlong operation time of a furnace table. The heat conductivity is higher, so that the heat loss is larger, and the utilization efficiency of energy sources is reduced. Although the electrode is used under the protection of inert gas, the electrode still can react with oxygen and the like in a high-temperature environment to cause oxidation corrosion, particularly the end connected with the heater is more serious due to higher temperature, so that the service life of the electrode is shortened. Disclosure of utility model The utility model aims to provide a graphite electrode device for a single crystal furnace, which can reduce the self resistivity and achieve the effects of energy conservation and consumption reduction when being actually arranged between a heater and an external electrode. The utility model further aims to provide the single crystal furnace, which can reduce the self resistivity of the graphite electrode and achieve the effects of energy conservation and consumption reduction when being actually arranged between the heater and the external electrode. The technical scheme of the utility model is realized as follows: The utility model provides a graphite electrode for single crystal growing furnace, includes the electrode body, the electrode body includes heater connecting portion and the reducing portion of integral structure, the diameter of reducing portion is less than the diameter of heater connecting portion, the both ends of electrode body are first end and second end respectively, heater connecting portion are located first end, just first end is used for connecting the heater, the second end is used for connecting external electrode. Further, a first mounting hole is formed in the end face of the first end, and the first mounting hole is used for being connected with a heater. Further, a second mounting hole is formed in the end face of the second end, and the second mounting hole is used for being connected with an external electrode. Further, the first mounting hole adopts a threaded hole of M36 x 3, and the second mounting hole adopts a threaded hole of M45 x 3. Further, the electrode body is provided with a channel along the axial direction of the electrode body, and two ends of the channel are respectively communicated with the first mounting hole and the second mounting hole. Further, at least one vent hole is formed in the side portion of the electrode body, and the vent hole is communicated with the channel. Further, the channel adopts a circular channel, and the first mounting hole and the second mounting hole are collinear with the central axis of the channel. Further, the diameter range of the channel is 12-17 mm. Further, the overall height range of the electrode body is 300-305 mm, the thickness range of the heater connecting portion is 8-12 mm, the diameter of the heater connecting portion is 90mm, and the diameter range of the diameter reducing portion is 55-65 mm. A single crystal furnace comprises the graphite electrode for the single crystal furnace. Compared with the prior art, the utility model has the beneficial effects that: The utilit