CN218989479U

CN218989479U - Single crystal furnace heating element with slotted semicircular ring

Info

Publication number: CN218989479U
Application number: CN202223262676.7U
Authority: CN
Inventors: 廖彬彬; 王军; 宋立强
Original assignee: Chinatungsten Rare Metal New Materials Hunan Co ltd
Current assignee: Chinatungsten Rare Metal New Materials Hunan Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-05-09
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a single crystal furnace heating element with slotted semicircular rings, which comprises a plurality of U-shaped tungsten rods and electrodes, wherein two side arms of each U-shaped tungsten rod are respectively fixed through the slotted semicircular rings which are oppositely arranged, and the U-shaped tungsten rods are uniformly distributed in the circumferential direction; the two poles of the electrode are respectively connected with two side arms of each U-shaped tungsten rod. The U-shaped tungsten rods are restrained through the plurality of groups of grooved semicircular rings, so that uniform intervals are kept on the circumference of the same diameter of all the U-shaped tungsten rods, the temperature of a thermal field is kept uniform all the time, and the growth of polycrystal caused by the occurrence of new crystal nucleus is avoided.

Description

Single crystal furnace heating element with slotted semicircular ring

Technical Field

The utility model belongs to the technical field of single crystal growth, and particularly relates to a single crystal furnace heating body with a slotted semicircular ring.

Background

The growth method of the sapphire single crystal comprises a kyropoulos method, a heat exchange method, a film guiding method, a crucible descending method and the like, and the kyropoulos method has a large market share because of high automation degree and stable and reliable crystal quality.

The principle of growing sapphire monocrystal by kyropoulos method is that alumina is melted in a tungsten crucible, then seed crystal is stretched into molten soup from the upper surface of the crucible, so that the surface of the seed crystal is slightly melted, the current power of a tungsten rod heating body is gradually reduced, the temperature of a thermal field is reduced, and the alumina is slowly crystallized and grown on the seed crystal. In order to ensure that single crystals are obtained, the whole cooling and crystal growth process requires that the temperature of the thermal field is always uniform so as to avoid new crystal nuclei to grow into polycrystal.

In the existing single crystal furnace technology, the temperature uniformity of a thermal field is realized mainly through the heat preservation of a molybdenum heat shield, for example, the technology of patent number CN209941146U and patent name of heat preservation structure of a sapphire single crystal furnace. However, the defect is that the heat source cannot be controlled, and the phenomenon of uneven local temperature occurs, so that the growth of single crystals is finally affected.

Disclosure of Invention

The utility model aims to provide a single crystal furnace heating element with slotted semicircular rings, which keeps heat sources uniformly distributed.

The single crystal furnace heating body with the slotted semicircle rings comprises a plurality of U-shaped tungsten rods and electrodes, wherein two side arms of each U-shaped tungsten rod are respectively fixed through the slotted semicircle rings which are oppositely arranged, and each U-shaped tungsten rod is uniformly distributed in the circumferential direction; the two poles of the electrode are respectively connected with two side arms of each U-shaped tungsten rod.

In one embodiment of the above heater, the slotted semicircle is a tungsten rod bent into a standard semicircle; a plurality of semicircular clamping grooves are uniformly formed in the grooved semicircular ring, and the depth of each clamping groove is the same as the radius of the U-shaped tungsten rod.

In one embodiment of the above heater, the two slotted semicircular openings are disposed opposite to each other and are arranged in a row.

In one embodiment of the above heater, the U-shaped tungsten rod is vertically disposed, and the interval between the two side arms is the same as the diameter of the slotted semicircular ring.

In one embodiment of the foregoing heater, the number of the U-shaped tungsten rods is the same as that of the slots of the slotted semicircular rings, one side arm of each U-shaped tungsten rod is clamped in a slot of one slotted semicircular ring, the other side arm is clamped with a slot of another slotted semicircular ring in the same row, and each U-shaped tungsten rod is tied and fixed on the slot.

In one embodiment of the above heater, the bottom ends of the U-shaped tungsten rods pass through the center of the slotted semicircular ring, so that the U-shaped tungsten rods are uniformly distributed in the circumferential direction.

In one embodiment of the above heater, five rows of slotted semicircular rings are arranged on the outer side of each U-shaped tungsten rod from top to bottom, so that each U-shaped tungsten rod is completely fixed.

In one embodiment of the foregoing heater, the electrode is divided into a positive electrode and a negative electrode, wherein the positive electrode is connected to the top end of one side arm of each U-shaped tungsten rod, and the negative electrode is connected to the top end of the other side arm of each U-shaped tungsten rod.

In one embodiment of the heater, a certain distance is kept between the grooved semicircular rings of the two electrode parts in the same row, so that short circuit is prevented.

The U-shaped tungsten rods are restrained through the plurality of groups of grooved semicircular rings, so that uniform intervals are kept on the circumference of the same diameter of all the U-shaped tungsten rods, the temperature of a thermal field is kept uniform all the time, and the growth of polycrystal caused by the occurrence of new crystal nucleus is avoided.

Drawings

Fig. 1 is a schematic side view of an embodiment of the present utility model.

Fig. 2 is a schematic structural view of the slotted semicircle in fig. 1.

FIG. 3 is a schematic diagram of a heating element placed in a single crystal furnace in the background art.

Detailed Description

As shown in FIG. 1, the heating element of the single crystal furnace with the slotted semicircle disclosed by the embodiment comprises a slotted semicircle 1, a U-shaped tungsten rod 2 and a copper electrode 3.

As shown in fig. 2, the slotted semicircular ring 1 is made of tungsten, and is generally formed by bending a tungsten rod with the same diameter as the U-shaped tungsten rod 2 into a standard semicircular ring. To prevent short circuit, both end portions of the semicircular ring are cut inward by 4mm.

The slotted semicircle ring 1 is uniformly provided with 30 semicircular clamping grooves, and the arc angle interval of each clamping groove is 6 degrees. The depth of the clamping groove is the same as the radius of the U-shaped tungsten rod, so that the self strength of the semicircular ring is ensured, and the slotting depth is generally not more than half the diameter of the U-shaped tungsten rod.

The clamping groove is arranged to facilitate the semicircular ring to be attached to the U-shaped tungsten rod and keep the distance between the U-shaped tungsten rods.

In the actual production design process, the number of the clamping grooves is different according to the number of the U-shaped tungsten rods.

The openings of the two slotted semicircular rings 1 are oppositely arranged and are arranged in a row.

The U-shaped tungsten rod 2 is vertically arranged, the length of the side arm is 800mm, and the interval between the two side arms is the same as the diameter of the slotted semicircular ring.

The U-shaped tungsten rods are arranged in total, one side arm of each U-shaped tungsten rod is clamped in a clamping groove of one slotted semicircular ring, the other side arm is clamped with a clamping groove of the other slotted semicircular ring in the same row, and each U-shaped tungsten rod is fixed on the clamping groove through a tungsten wire with the diameter of 0.2mm in a binding mode. The bottom of each U-shaped tungsten rod passes through the center of a slotted semicircular ring, and finally, the U-shaped tungsten rods are uniformly distributed in the circumferential direction.

Five rows of slotted semicircular rings are arranged on the outer side of each U-shaped tungsten rod from top to bottom, so that each U-shaped tungsten rod is completely fixed. The spacing between each group of slotted semicircle rings is not more than 150mm.

The copper electrode 3 is divided into a positive electrode and a negative electrode, wherein the positive electrode is communicated with the top end of one side arm of each U-shaped tungsten rod, and the negative electrode is communicated with the top end of the other side arm of each U-shaped tungsten rod. A certain distance is kept between slotted semicircular rings which are arranged in the same row and belong to two electrode parts, so that short circuit is prevented.

When the heating element is installed, one side arm of each U-shaped tungsten rod is bound and fixed on one slotted semicircular ring, the other side arm is fixed on the opposite slotted semicircular ring, finally four rows of slotted semicircular rings are fixedly connected with each U-shaped tungsten rod, two stages of copper electrodes are respectively connected with two side arms of each U-shaped tungsten rod, and installation is completed.

When in use, the heating element is arranged in the single crystal furnace, and can heat the thermal field.

The heating element has the advantages that: the U-shaped tungsten rods are restrained through a plurality of groups of grooved semicircular rings, so that uniform intervals are kept on the circumferences of the same diameter of all the U-shaped tungsten rods, the temperature of a thermal field is kept uniform all the time, and the growth of polycrystal due to the occurrence of new crystal nucleus is avoided.

Claims

1. The utility model provides a single crystal growing furnace heat-generating body of fluting semicircle ring, includes U type tungsten pole and electrode, its characterized in that: the U-shaped tungsten rods are provided with a plurality of U-shaped tungsten rods, two side arms of each U-shaped tungsten rod are respectively fixed through oppositely arranged slotted semicircular rings, and each U-shaped tungsten rod is uniformly distributed in the circumferential direction; the two poles of the electrode are respectively connected with two side arms of each U-shaped tungsten rod.

2. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 1, wherein: the slotted semicircle is a tungsten rod bent into a semicircle; a plurality of semicircular clamping grooves are uniformly formed in the grooved semicircular ring, and the depth of each clamping groove is the same as the radius of the U-shaped tungsten rod.

3. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 2, wherein: the two slotted semicircular openings are oppositely arranged and are arranged in a row.

4. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 3, wherein: the U-shaped tungsten rod is vertically arranged, and the interval between the arms at the two sides of the U-shaped tungsten rod is the same as the diameter of the slotted semicircular ring.

5. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 4, wherein: the number of the U-shaped tungsten rods is the same as that of the clamping grooves of the slotted semicircular rings, one side arm of each U-shaped tungsten rod is clamped in the clamping groove of one slotted semicircular ring, the other side arm is clamped with the clamping groove of the other slotted semicircular ring in the same row, and each U-shaped tungsten rod is tied and fixed on the clamping groove.

6. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 5, wherein: the bottom ends of the U-shaped tungsten rods pass through the circle center of the slotted semicircular ring, so that the U-shaped tungsten rods are uniformly distributed in the circumferential direction.

7. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 6, wherein: five rows of slotted semicircular rings are arranged on the outer side of each U-shaped tungsten rod from top to bottom, and each U-shaped tungsten rod is completely fixed.

8. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 7, wherein: the electrode is divided into an anode and a cathode, wherein the anode is communicated with the top end of one side arm of each U-shaped tungsten rod, and the cathode is communicated with the top end of the other side arm of each U-shaped tungsten rod.

9. The single crystal furnace heating body with a slotted semicircle ring as claimed in claim 8, wherein: a certain distance is kept between slotted semicircular rings which are arranged in the same row and belong to two electrode parts, so that short circuit is prevented.