Temperature-adjustable crystal furnace

Abstract

The utility model discloses a temperature-adjustable crystal furnace, which belongs to the technical field of crystal production and comprises a furnace body, a heating furnace tube is arranged in the furnace body, and a crucible is arranged in the heating furnace tube. According to the utility model, through the arrangement of the first heating power supply and the second heating power supply, the first heating power supply supplies power to the upper-section resistance wire, the first temperature controller is matched with the first thermocouple to monitor and adjust the temperature of the upper-section resistance wire, and the second heating power supply supplies power to the lower-section resistance wire at the same time; the lower resistance wire is used for heating the lower section part of the heating furnace tube, and the second temperature controller and the second thermocouple are used for monitoring and adjusting the temperature of the lower resistance wire, so that the defect that the temperature gradient cannot be accurately controlled in the crystal growth process can be effectively overcome by arranging the double-temperature area; the heating mode of the scheme can quickly and accurately adjust and control the temperature gradient in the crystal growth furnace, and provides more favorable support for the crystal growth process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to crystal production technical field especially relates to a temperature adjustable crystal furnace. BACKGROUND

[0002] Temperature gradient is particularly important in the crystal growth process, and is the key to whether the crystal can grow normally and grow high-quality crystals. If the temperature gradient is too large, the crystal will crystallize too quickly during growth, which will easily produce internal defects. However, if the temperature gradient is too small, the crystal will not crystallize easily during growth. How to adjust a suitable temperature gradient is a particularly critical step in the entire crystal growth process. However, it is not easy to adjust the suitable temperature gradient in the crystal growth furnace. The strength of the temperature field and the heat preservation directly affect the size of the temperature gradient and thus the entire crystal growth process. However, the heat preservation effect of each adjustment of the temperature field cannot directly reflect the corresponding gradient temperature. It is necessary to continuously try to change the heat preservation effect of each part of the temperature field to achieve a relatively ideal temperature gradient to meet the needs of crystal growth.

[0003] The existing crystal growth furnace temperature gradient adjustment method adjusts the temperature field in the crystal furnace to achieve the desired temperature gradient. The thickness of the heat preservation material at different positions of the temperature field is adjusted to achieve the desired temperature gradient. The usual method is to continuously adjust the upper and lower heat preservation systems of the temperature field, adjust the thickness of the heat preservation material at different positions of the temperature field, and achieve the desired temperature gradient. This method cannot quickly and accurately adjust to the desired temperature gradient. It is time-consuming, expensive, and difficult to achieve the desired temperature gradient accurately. It is necessary to repeatedly experiment to gradually approach or achieve the ideal temperature gradient. SUMMARY

[0004] The utility model discloses a temperature adjustable crystal furnace to solve the problem of not being able to quickly and accurately adjust the temperature field.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a temperature adjustable crystal furnace, comprising a furnace body, a heating furnace pipe is arranged in the inside of the furnace body, a crucible is arranged in the inside of the heating furnace pipe;

[0006] The inside of the crucible is provided with raw materials, the upper section of the heating furnace pipe is provided with upper heat preservation, and the lower section of the heating furnace pipe is provided with lower heat preservation.

[0007] Further description of the above technical scheme:

[0008] The upper section of the heating furnace pipe is wound with an upper section resistance wire, and the lower section of the heating furnace pipe is wound with a lower section resistance wire.

[0009] As a further description of the above technical solution:

[0010] The upper section of the heating furnace tube is provided with a first heating power supply, and the lower section of the heating furnace tube is provided with a second heating power supply.

[0011] As a further description of the above technical solution:

[0012] One end of the upper section of the resistance wire extends to the outside of the furnace body, and a first thermocouple is arranged on the outer wall of the upper section of the resistance wire.

[0013] As a further description of the above technical solution:

[0014] One end of the upper section of the resistance wire is provided with a first temperature controller, and one end of the lower section of the resistance wire extends to the outside of the furnace body.

[0015] As a further description of the above technical solution:

[0016] A second thermocouple is arranged on the outer wall of the lower section of the resistance wire, one end of the lower section of the resistance wire is provided with a second temperature controller, and heat insulation cotton is arranged between the furnace body and the heating furnace tube.

[0017] As described above, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0018] 1、In the present application, by arranging the first heating power supply and the second heating power supply, the first heating power supply supplies power to the upper section of the resistance wire, and the first temperature controller cooperates with the first thermocouple to monitor and adjust the temperature of the upper section of the resistance wire, while the second heating power supply supplies power to the lower section of the resistance wire, and the second temperature controller and the second thermocouple monitor and adjust the temperature of the lower section of the resistance wire, so that the temperature gradient in the crystal growth process can be accurately controlled, and the heating method of the present application can quickly and accurately adjust and control the temperature gradient in the crystal growth furnace, providing more favorable support for the crystal growth process.

[0019] 2、In the present application, the heat insulation cotton is arranged to insulate the heating furnace tube, which can effectively prevent the heat in the furnace from being lost to the outside, thereby significantly improving the energy efficiency, because less heat energy is wasted to the environment, thereby reducing the operating cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is an internal structure diagram of a temperature-adjustable crystal furnace.

[0021] Fig. 2 It is an internal structure diagram of a heating furnace tube in a temperature-adjustable crystal furnace.

[0022] Legend:

[0023] 1, furnace body; 2, heating furnace tube; 3, crucible; 4, raw material; 5, heat preservation cotton; 6, first heating power supply; 7, first temperature controller; 8, first thermocouple; 9, second heating power supply; 10, lower section resistance wire; 11, second temperature controller; 12, second thermocouple; 13, upper section resistance wire. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figs. 1-2 The utility model provides a kind of technical scheme: a temperature-adjustable crystal furnace, including furnace body 1, the inside of the furnace body 1 is provided with heating furnace tube 2, the inside of the heating furnace tube 2 is provided with crucible 3;

[0026] The inside of the crucible 3 is provided with raw material 4, the upper section of the heating furnace tube 2 is upper heat preservation, the lower section of the heating furnace tube 2 is lower heat preservation, the upper section of the heating furnace tube 2 is wound with upper section resistance wire 13, the lower section of the heating furnace tube 2 is wound with lower section resistance wire 10, the upper section of the heating furnace tube 2 is provided with first heating power supply 6, the lower section of the heating furnace tube 2 is provided with second heating power supply 9, one end of the upper section resistance wire 13 extends to the outside of furnace body 1, first thermocouple 8 is provided on the outer wall of the upper section resistance wire 13, one end of the upper section resistance wire 13 is provided with first temperature controller 7, one end of the lower section resistance wire 10 extends to the outside of furnace body 1.

[0027] Its specific implementation is: the crucible 3 with raw material 4 is placed in the center position of heating furnace tube 2, which helps to make raw material 4 heat stably, then the lid of furnace body 1 is closed, at this time, the upper section resistance wire 13 is powered by first heating power supply 6, the upper section of heating furnace tube 2 is heated by upper section resistance wire 13, and the temperature of upper section resistance wire 13 is monitored and adjusted by first temperature controller 7 in cooperation with first thermocouple 8, at the same time, the lower section resistance wire 10 is powered by second heating power supply 9, the lower section of heating furnace tube 2 is heated by lower section resistance wire 10, and the temperature of lower section resistance wire 10 is monitored and adjusted by second temperature controller 11 and second thermocouple 12.

[0028] The outer wall of the lower resistance wire 10 is provided with a second thermocouple 12, one end of the lower resistance wire 10 is provided with a second temperature controller 11, and the furnace body 1 is provided with heat preservation cotton 5 between the furnace body 1 and the heating furnace pipe 2.

[0029] The specific implementation is that: at this time, under the action of the heat preservation cotton 5, the working efficiency of the furnace body 1 is improved by being provided with the heat preservation cotton, and the heat preservation cotton 5 insulates the heating furnace pipe 2.

[0030] Working principle: first, open the cover of the furnace body 1, then place the raw material 4 in the crucible 3, place the crucible 3 containing the raw material 4 in the center of the heating furnace pipe 2, then close the cover of the furnace body 1, at this time, the upper resistance wire 13 is powered by the first heating power supply 6, the upper resistance wire 13 heats the upper part of the heating furnace pipe 2, and the temperature of the upper resistance wire 13 is monitored and adjusted by the first temperature controller 7 and the first thermocouple 8, at the same time, the lower resistance wire 10 is powered by the second heating power supply 9, the lower resistance wire 10 heats the lower part of the heating furnace pipe 2, and the temperature of the lower resistance wire 10 is monitored and adjusted by the second temperature controller 11 and the second thermocouple 12, at this time, under the action of the heat preservation cotton 5, the heat preservation cotton 5 insulates the heating furnace pipe 2.

[0031] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A temperature-adjustable crystal furnace, characterized in that: It comprises a furnace body (1), a heating furnace tube (2) is arranged inside the furnace body (1), and a crucible (3) is arranged inside the heating furnace tube (2); Raw materials (4) are arranged inside the crucible (3), the upper section of the heating furnace tube (2) is an upper heat-insulating section, and the lower section of the heating furnace tube (2) is a lower heat-insulating section.

2. The temperature-adjustable crystal furnace according to claim 1, characterized in that: An upper resistance wire (13) is wound around the upper portion of the heating furnace tube (2), and a lower resistance wire (10) is wound around the lower portion of the heating furnace tube (2).

3. The temperature-adjustable crystal furnace according to claim 2, characterized in that: The upper portion of the heating furnace tube (2) is provided with a first heating power supply (6), and the lower portion of the heating furnace tube (2) is provided with a second heating power supply (9).

4. The temperature-adjustable crystal furnace according to claim 3, characterized in that: One end of the upper resistance wire (13) extends to the outside of the furnace body (1), and a first thermocouple (8) is provided on the outer wall of the upper resistance wire (13).

5. The temperature-adjustable crystal furnace according to claim 4, characterized in that: One end of the upper resistance wire (13) is provided with a first temperature controller (7), and one end of the lower resistance wire (10) extends to the outside of the furnace body (1).

6. The temperature-adjustable crystal furnace according to claim 5, characterized in that: A second thermocouple (12) is provided on the outer wall of the lower resistance wire (10), a second temperature controller (11) is provided at one end of the lower resistance wire (10), and thermal insulation cotton (5) is provided between the furnace body (1) and the heating furnace tube (2).

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