A temperature difference control system for growing diamonds

Abstract

The application relates to the technical field of artificial cultivation of diamonds by HTHP temperature difference, and relates to a temperature difference control system for cultivating diamonds, which comprises a cooling pool and a temperature control unit, the cooling pool is provided with two groups, and cooling units are arranged in the two groups; the temperature control unit is connected with the two groups of cooling units, the temperature control unit senses and controls the temperatures of upper hammer cooling water and lower hammer cooling water, the temperatures of the upper hammer cooling water and the lower hammer cooling water are both set to 10-45 DEG C during the cooling process; the temperature control unit controls the temperatures of the upper hammer cooling water and the lower hammer cooling water when the upper hammer cooling water and the lower hammer cooling water enter the cultivation device, so that the upper hammer cooling water and the lower hammer cooling water have a temperature difference, the temperature difference linearly increases with the cultivation time in steps, and the temperature difference is set to 0-15 DEG C. The application controls the temperatures of the cooling water in different time periods of diamond cultivation, forms a reasonable temperature difference between the upper end and the lower end of the cultivation device, and makes the diamond always in the best temperature difference state during the growth process, so that the quality, yield and production efficiency of the diamond embryo are stably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of artificial cultivation of diamonds by HTHP temperature difference, in particular to a temperature difference control system for cultivating diamonds. BACKGROUND

[0002] The manufacturing principle of high-temperature and high-pressure cultivated diamonds is to form the temperature difference between the upper and lower parts by designing the cavity structure and the heat preservation material. Under the catalytic action, the carbon atoms migrate from the part with higher temperature to the part with lower temperature, and finally crystallize into diamond form on the surface of the crystal seed. With the extension of time, the crystal grows into a diamond blank.

[0003] For a long time, people have made a lot of research and optimization on the structure design and material design, and have made many achievements. However, the scheme of improving the temperature difference from the aspects of structure design and material design has been optimized to the extreme, and it is impossible to accurately control the temperature difference by adjusting the structure and material.

[0004] For example, in the related art, CN116555908A discloses a device for adjusting temperature gradient of double-layer heating pipe synthetic cultivation diamond, which mainly includes a main heating pipe and an auxiliary heating pipe. By adjusting the position of the auxiliary heating pipe, the temperature difference is adjusted.

[0005] In theory, the temperature difference generated by the heating device when synthesizing and cultivating diamonds should be in the range of 15-20℃, that is, as long as this condition is met, any means can achieve the purpose of growing diamonds. However, the cultivation process of diamonds is a delicate and complex process, and the requirements for temperature difference are different at different time periods. Once the structure and material of the above device are determined, the temperature difference distribution is also determined, and at this time, the temperature difference cannot be changed at different time periods during the synthesis process to adapt to the growth of diamonds.

[0006] Therefore, it is urgent to provide a temperature difference control system which can provide a required temperature difference range on the basis of improved structure and material, and the formed temperature difference can be adaptively adjusted at different time periods, so that the growth process of diamonds is always in the best temperature difference state. SUMMARY

[0007] The present application provides a temperature difference control system for cultivating diamonds, which can realize linear control of temperature at different time periods during diamond cultivation, so as to set a reasonable temperature difference at different cultivation time periods, so that the growth process of diamonds is always in the best temperature difference state, and the quality, yield and production efficiency of diamond embryos are stably improved.

[0008] The temperature difference control system for cultivating diamonds provided by the present application adopts the following technical scheme:

[0009] A temperature difference control system for cultivating diamonds, comprising:

[0010] cooling pools, provided with two groups, one group of the cooling pools is used for cooling upper hammer cooling water, and the other group of the cooling pools is used for cooling lower hammer cooling water, and cooling units are arranged in the two groups of the cooling pools;

[0011] temperature control units, connected with the two groups of the cooling units respectively, the temperature control units sense the temperatures of the upper hammer cooling water and the lower hammer cooling water, and control the temperatures of the upper hammer cooling water and the lower hammer cooling water through the cooling units;

[0012] During the cooling process, the temperatures of the upper hammer cooling water and the lower hammer cooling water are both set to 10-45℃; the temperature control units control the temperatures of the upper hammer cooling water and the lower hammer cooling water when they enter the cultivation device, so that there is a temperature difference between the upper hammer cooling water and the lower hammer cooling water, the temperature difference linearly increases with the cultivation time in steps, and the temperature difference is set to 0-15℃.

[0013] Further, the substrate sequentially enters the first stage, the second stage, the third stage, the fourth stage and the fifth stage within the cultivation time.

[0014] In the first stage, the temperature difference is set to 0-1℃, in the second stage, the temperature difference is set to 1-2℃, in the third stage, the temperature difference is set to 2-4℃, in the third stage, the temperature difference is set to 4-6℃, and in the fourth stage, the temperature difference is set to 6-10℃.

[0015] Further, the cultivation time is set to 185-195h.

[0016] Further, the temperature of the upper hammer cooling water is set to remain unchanged, and the temperature of the lower hammer cooling water is set to linearly decrease.

[0017] Further, the temperature of the upper hammer cooling water is set to any value in 35-45℃, and the temperature of the lower hammer cooling water is set to any value in 25-40℃.

[0018] Further, the temperature of the lower hammer cooling water is set to remain unchanged, and the temperature of the upper hammer cooling water is set to linearly increase.

[0019] Further, the temperature of the lower hammer cooling water is set to any value in 30-40℃, and the temperature of the upper hammer cooling water is set to any value in 35-45℃.

[0020] Further, the temperature of the lower hammer cooling water is set to linearly decrease, and the temperature of the upper hammer cooling water is set to linearly increase.

[0021] Further, the temperature of the upper hammer cooling water is set to 30-45°C, and the temperature of the lower hammer cooling water is set to 25-40°C.

[0022] To sum up, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The present application divides the cultivation time and finely controls the temperature of the upper hammer cooling water and the lower hammer cooling water in different time periods, thereby regulating the temperature difference between the upper and lower ends of the cultivation device, and realizing linear controllability of the temperature difference in different time periods. That is, according to the growth needs of different time periods, a reasonable temperature difference is set to keep the diamond growth process in the best temperature difference state, and the quality and yield of the diamond embryo are improved.

[0024] 2. In the present application, the temperature difference between the upper hammer cooling water and the lower hammer cooling water increases linearly in steps to ensure that the substrate has high purity when forming a crystal seed. As time goes on, the crystal seed begins to grow and form a diamond embryo, and the diamond embryo grows longer and larger. At this time, the area that can accept C elements also becomes larger. Correspondingly, the size and growth rate of the temperature difference also increase in matching. While improving the quality and yield of the diamond, the cultivation efficiency of the diamond is also improved.

[0025] 3. In the present application, adjusting the temperature of the upper hammer cooling water and the lower hammer cooling water plays a major role in forming a temperature difference between the upper and lower ends of the cultivation device, reducing the requirements for the structure, material, etc. of the cultivation device, and greatly reducing the dependence on the stability of the substrate, thereby greatly improving the production stability. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the temperature difference control system in the present application;

[0027] Figure 2 is a flowchart of controlling the upper hammer cooling water and the lower hammer cooling water in the present application;

[0028] Figure 3 is a temperature change diagram of the upper hammer cooling water and the lower hammer cooling water in Example 1 of the present application;

[0029] Figure 4 is a temperature change diagram of the upper hammer cooling water and the lower hammer cooling water in Example 2 of the present application;

[0030] Figure 5 is a temperature change diagram of the upper hammer cooling water and the lower hammer cooling water in Example 3 of the present application;

[0031] 1. Cooling pool; 2. Cooling unit; 3. Temperature control unit; 31. Sensor; 32. Controller. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described below with reference to the accompanying drawings Figures 1-5 The technical solutions of the present application will be described below with reference to the accompanying drawings

[0033] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] It should be further understood that the term "and / or" used in the specification and corresponding claims of the present application means any combination of one or more of the listed items and all possible combinations.

[0036] A temperature difference control system for cultivating diamonds, with reference to Figure 1 and Figure 2 , comprising a cooling pool 1, the cooling pool 1 is provided with two groups, one group of cooling pool 1 is used for storing upper hammer cooling water, the other group of cooling pool 1 is used for storing lower hammer cooling water, the temperature of the upper hammer cooling water and the lower hammer cooling water is set to 10-45℃, the upper hammer cooling water / lower hammer cooling water circulates between the cultivation device and the corresponding cooling pool 1, the temperature of the upper hammer and the lower hammer of the cultivation device is adjusted by heat exchange, and the temperature difference is formed.

[0037] The upper hammer cooling water and the lower hammer cooling water will absorb part of the heat of the cultivation device, and because the temperature of the upper hammer cooling water and the lower hammer cooling water is different, the heat absorption capacity between the upper hammer cooling water and the lower hammer cooling water is different, that is, by controlling the temperature difference of the upper hammer cooling water and the lower hammer cooling water, the temperature adjustment effect of the upper hammer and the lower hammer of the cultivation device in two directions is accurately adjusted, and the difference in temperature adjustment effect is used to realize the controllable temperature difference of the upper hammer and the lower hammer of the cultivation device, and provide suitable temperature for the cultivation of diamonds.

[0038] In the process of cooling the upper hammer cooling water and the lower hammer cooling water, the temperature of the upper hammer cooling water and the lower hammer cooling water entering the incubation device is controlled, so that there is a temperature difference between the upper hammer cooling water and the lower hammer cooling water, the temperature difference increases linearly with the incubation time, and the temperature difference is set to 0-15℃.

[0039] Correspondingly, the temperature difference control system further comprises a cooling unit 2 and a temperature control unit 3. The cooling unit 2 is provided with two groups, which are arranged one by one with the two groups of cooling pools 1, that is, one group of cooling units 2 is used for cooling the upper hammer cooling water, and the other group of cooling units 2 is used for cooling the lower hammer cooling water, so as to ensure that the temperature of the upper hammer cooling water and the lower hammer cooling water is always within the range of 10-45℃, so as to regulate the temperature difference between the upper hammer and the lower hammer of the incubation device.

[0040] Among them, the cooling unit 2 can be specifically set according to the actual situation. In a specific embodiment, the cooling unit 2 can be set as a water chiller, and in another specific embodiment, it can also be set in other suitable forms, which can ensure that the upper hammer cooling water and the lower hammer cooling water can be cooled.

[0041] Further, the temperature control unit 3 is used for sensing the temperature of the upper hammer cooling water and the lower hammer cooling water, and controlling the temperature of the upper hammer cooling water and the lower hammer cooling water by controlling the running state of the cooling unit 2.

[0042] Specifically, the temperature control unit 3 comprises a controller 32 and two groups of sensors 31, both of which are connected to the input end of the controller 32, and both of which are connected to the output end of the controller 32. One group of sensors 31 is placed in the cooling pool 1 storing the upper hammer cooling water to sense the temperature of the upper hammer cooling water, and the other group of sensors 31 is placed in the cooling pool 1 storing the lower hammer cooling water to sense the temperature of the lower hammer cooling water.

[0043] The two groups of sensors 31 respectively transmit the temperature of the upper hammer cooling water and the lower hammer cooling water to the controller 32, and the controller 32 controls the power of the cooling unit 2 according to the real-time temperature of the upper hammer cooling water and the lower hammer cooling water, so that the upper hammer cooling water and the lower hammer cooling water re-enter the incubation device at a preset temperature for cyclic heat exchange.

[0044] Further, the substrate sequentially enters the first stage, the second stage, the third stage, the fourth stage and the fifth stage within the incubation time, and the temperature difference between the upper hammer cooling water and the lower hammer cooling water increases linearly with the incubation time.

[0045] By dividing the cultivation time and finely controlling the temperature of the upper hammer cooling water and the lower hammer cooling water at different time periods, the temperature difference between the upper end and the lower end of the cultivation device is regulated, and the linear controllability of the temperature difference in different time periods is realized. That is, according to the growth needs of different time periods, a reasonable temperature difference is set to make the diamond growth process always in the best temperature difference state.

[0046] In this way, the substrate can have high purity when forming the crystal seed. As time goes on, the crystal seed begins to grow to form a diamond embryo, and the diamond embryo grows longer and larger. At this time, the area that can accept C elements also becomes larger, and correspondingly, the size of the temperature difference and the growth rate of the temperature difference also increase in matching, so as to improve the cultivation efficiency of the diamond, and the obtained diamond embryo has high quality and yield.

[0047] Specifically, the temperature difference between the upper hammer cooling water and the lower hammer cooling water is set as follows to meet the temperature difference requirements of the upper hammer and the lower hammer of the cultivation device.

[0048] Among them, in the first stage, the temperature difference is set to 0-1℃, in the second stage, the temperature difference is set to 1-2℃, in the third stage, the temperature difference is set to 2-4℃, in the fourth stage, the temperature difference is set to 4-6℃, and in the fifth stage, the temperature difference is set to 6-10℃.

[0049] Further, the cultivation time is set to 185-195h. The cultivation time is set according to the actual situation (the size of the inner cavity of the cultivation device, the temperature and pressure provided by the cultivation device). In a specific embodiment, the cultivation time of the diamond embryo is set to 190h.

[0050] Further, in a specific embodiment, the temperature of the upper hammer cooling water remains unchanged, and the temperature of the lower hammer cooling water linearly decreases to form a temperature difference. The temperature of the upper hammer cooling water is set to any value in 35-45℃, and the temperature of the lower hammer cooling water is set to 25-40℃.

[0051] Specifically, referring to Figure 3 In a specific embodiment, the temperature of the upper hammer cooling water is set to 38℃. In the first stage, the lower hammer cooling water linearly decreases from 38℃ to 37℃; in the second stage, the lower hammer cooling water linearly decreases from 37℃ to 36℃; in the third stage, the lower hammer cooling water linearly decreases from 36℃ to 34℃; in the fourth stage, the lower hammer cooling water linearly decreases from 34℃ to 32℃; and in the fifth stage, the lower hammer cooling water linearly decreases from 32℃ to 28℃.

[0052] Example 2:

[0053] Referring to Figure 4In this embodiment 2, the temperature settings of the upper hammer cooling water and the lower hammer cooling water are controlled as follows: the temperature of the lower hammer cooling water is kept constant, and the temperature of the upper hammer cooling water is linearly increased.

[0054] In this embodiment 3, the temperature settings of the upper hammer cooling water and the lower hammer cooling water are controlled as follows: the temperature of the lower hammer cooling water is linearly decreased, and the temperature of the upper hammer cooling water is linearly increased.

[0055] Specifically, in a specific embodiment, the temperature of the lower hammer cooling water is set to 32℃. In the first stage, the temperature of the upper hammer cooling water is linearly increased from 32℃ to 33℃; in the second stage, the temperature of the upper hammer cooling water is linearly increased from 33℃ to 34℃; in the third stage, the temperature of the upper hammer cooling water is linearly increased from 34℃ to 36℃; in the fourth stage, the temperature of the upper hammer cooling water is linearly decreased from 36℃ to 38℃; and in the fifth stage, the temperature of the upper hammer cooling water is linearly decreased from 38℃ to 42℃.

[0056] Embodiment 3:

[0057] With reference to Figure 5 In this embodiment 2, the temperature settings of the upper hammer cooling water and the lower hammer cooling water are controlled as follows: the temperature of the lower hammer cooling water is kept constant, and the temperature of the upper hammer cooling water is linearly increased.

[0058] In this embodiment 3, the temperature settings of the upper hammer cooling water and the lower hammer cooling water are controlled as follows: the temperature of the lower hammer cooling water is linearly decreased, and the temperature of the upper hammer cooling water is linearly increased.

[0059] Specifically, in a specific embodiment, in the first stage, the temperature of the upper hammer cooling water is linearly increased from 31℃ to 31.5℃, and the temperature of the lower hammer cooling water is linearly decreased from 31℃ to 30.5℃; in the second stage, the temperature of the upper hammer cooling water is linearly increased from 31.5℃ to 32℃, and the temperature of the lower hammer cooling water is linearly decreased from 30.5℃ to 30℃; in the third stage, the temperature of the upper hammer cooling water is linearly increased from 32℃ to 33℃, and the temperature of the lower hammer cooling water is linearly decreased from 30℃ to 29℃; in the fourth stage, the temperature of the upper hammer cooling water is linearly increased from 32℃ to 33℃, and the temperature of the lower hammer cooling water is linearly decreased from 29℃ to 28℃; and in the fifth stage, the temperature of the upper hammer cooling water is linearly increased from 33℃ to 35℃, and the temperature of the lower hammer cooling water is linearly decreased from 28℃ to 26℃.

[0060] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Identical parts are indicated by identical reference numerals. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A temperature difference control system for growing diamonds, characterized in that, The utility model relates to a substrate incubation device and method, comprising: cooling pool is provided with two groups, one group of cooling pool is used for cooling upper hammer cooling water, another group of cooling pool is used for cooling lower hammer cooling water, and cooling unit is arranged in two groups of cooling pool; temperature control unit is connected with two groups of cooling unit respectively, the temperature control unit senses the temperature of upper hammer cooling water and lower hammer cooling water, and controls the temperature of upper hammer cooling water and lower hammer cooling water through cooling unit; during the cooling process, the temperature of upper hammer cooling water and lower hammer cooling water is set to 10-45 DEG C, the temperature control unit controls the temperature of upper hammer cooling water and lower hammer cooling water when entering the incubation device, so that there is a temperature difference between upper hammer cooling water and lower hammer cooling water, the temperature difference linearly increases with the incubation time step, and the temperature difference is set to 0-15 DEG C.

2. A temperature difference control system for growing diamonds according to claim 1, wherein, The substrate sequentially enters the first stage, the second stage, the third stage, the fourth stage and the fifth stage within the incubation time. Wherein, in the first stage, the temperature difference is set to 0-1 DEG C, in the second stage, the temperature difference is set to 1-2 DEG C, in the third stage, the temperature difference is set to 2-4 DEG C, in the third stage, the temperature difference is set to 4-6 DEG C, and in the fourth stage, the temperature difference is set to 6-10 DEG C.

3. A temperature difference control system for growing diamonds according to claim 2, wherein, The incubation time is set to 185-195 h.

4. A temperature difference control system for growing diamonds according to claim 2, wherein, The temperature of upper hammer cooling water is kept unchanged, and the temperature of lower hammer cooling water is linearly reduced.

5. A temperature difference control system for growing diamonds according to claim 4, wherein, The temperature of upper hammer cooling water is set to any value in 35-45 DEG C, and the temperature of lower hammer cooling water is set to 25-40 DEG C.

6. A temperature difference control system for growing diamonds according to claim 2, wherein, The temperature of lower hammer cooling water is kept unchanged, and the temperature of upper hammer cooling water is linearly increased.

7. A temperature difference control system for growing diamonds according to claim 6, wherein, The temperature of lower hammer cooling water is set to any value in 30-40 DEG C, and the temperature of upper hammer cooling water is set to 35-45 DEG C.

8. A temperature difference control system for growing diamonds according to claim 2, wherein, The temperature of lower hammer cooling water is linearly reduced, and the temperature of upper hammer cooling water is linearly increased.

9. A temperature difference control system for growing diamonds according to claim 8, wherein, The temperature of upper hammer cooling water is set to 30-45 DEG C, and the temperature of lower hammer cooling water is set to 25-40 DEG C.

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