Diamond growth temperature measuring method

Abstract

The invention relates to the technical field of infrared temperature measurement, in particular to a method for measuring diamond growth temperature, which comprises the following steps of: 1, designing a measuring device for measuring the diamond growth temperature; 2, adjusting the position of the temperature measuring lens through the stretching of the spring device; 3, finely adjusting the movement of the temperature measuring lens through a screw to measure the temperature at the center position of the diamond surface; the temperature measuring device can accurately measure the temperature condition of the diamond on the molybdenum base table in the growth process, the temperature measuring point is prevented from falling on the wall of the observation window by enlarging the size of the observation window, inaccurate temperature measurement is avoided, the spring device is fixed to the temperature measuring lens, the position of the temperature measuring point is adjusted through stretching of the spring device, and the temperature measuring accuracy is improved. The limitation of small measurement position area in the prior art is improved, meanwhile, the problem that the temperature measurement point moves along with the change of the growth thickness in the diamond growth process is solved, and the problems that due to inaccurate temperature measurement, polycrystal growth occurs on the surface of the single crystal diamond, and meanwhile cutting loss is increased are solved.

Description

Technical Field

[0001] The invention relates to the technical field of infrared temperature measurement, and in particular to a method for measuring the temperature of diamond growth. Background Art

[0002] Infrared temperature measurement technology mainly uses the infrared radiation characteristics of objects to measure temperature. This principle is based on thermodynamics and optics, that is, the higher the temperature of an object, the greater the intensity of the infrared radiation it emits. The temperature measuring device receives the infrared radiation emitted by the object through an infrared sensor and converts it into a temperature value. This temperature measurement principle allows the temperature measuring device to measure temperature without contacting the object, avoiding cross-infection and damage to the surface of the object that may be caused by traditional contact thermometers. Single crystal diamond is a wide bandgap semiconductor material with excellent performance. It is gaining more and more widespread applications in the manufacture of high-temperature, high-frequency and high-power electronic devices. However, the temperature during the growth process of single crystal diamond has a significant impact on the improvement of its quality. Uneven temperature causes temperature differences on its surface. High temperature is not conducive to single crystal growth, and low temperature causes yellowing, which reduces the quality of diamond.

[0003] During the growth of diamond, the position of the temperature measuring point moves with the change of thickness. Even if the temperature remains unchanged in the later stage, the temperature measurement may be inaccurate, resulting in polycrystalline growth on the surface of single-crystal diamond, reducing the quality of diamond and increasing cutting loss. At present, inaccurate temperature measurement affects human judgment. Part of the light source entering the temperature measuring point from the observation window may fall on the wall, resulting in low temperature measurement. At the same time, due to the small observation window, the temperature measurement is limited and each diamond cannot be fully measured. Therefore, the shortcomings of the equipment still need to be improved.

[0004] Therefore, in order to solve the problem that the temperature measurement point moves with the change of the growth thickness during the diamond growth process, and the temperature measurement may be inaccurate, a method for accurate temperature measurement can be designed. Summary of the invention

[0005] In order to overcome the problem that the temperature measurement point moves as the growth thickness changes during the diamond growth process, the temperature measurement may be inaccurate.

[0006] The technical solution of the present invention is: a method for measuring the temperature of diamond growth, comprising the following steps: Step 1: Design a measuring device for measuring the growth temperature of diamond, the measuring device includes a base and a measuring box; the upper end of the base is fixedly connected to a vertical support rod; the upper end of the vertical support rod is rotatably connected to a measuring rod; the end of the measuring rod is fixedly connected to a temperature measuring lens, the lower end of the temperature measuring lens is connected to one end of a spring device, and the other end of the spring device is fixedly connected to the vertical support rod; an observation window is provided at the left end of the measuring box; screws are installed in the spring device; a molybdenum base is provided in the measuring box; Step 2: Fix the base on the left side of the measuring box, adjust the front and rear position of the base, then move the base left and right, fix the base in a suitable position, loosen the screws, adjust the position of the temperature measuring lens by the extension and contraction of the spring device until the temperature measuring position requirements are met, tighten the screws, and the temperature measuring lens receives the infrared radiation emitted by the diamond and converts it into a temperature value; Step 3: As the diamond grows thicker, fine-tune the temperature measuring lens by using the screws to measure the temperature at the center of the diamond surface.

[0007] Preferably, the temperature measuring lens and the observation window are both designed to be higher on the left and lower on the right, and the diameter of the temperature measuring lens is smaller than the diameter of the observation window.

[0008] Preferably, the temperature measurement position is required to be: the infrared light emitted by the diamond on the upper end of the molybdenum base passes through the observation window and is focused on the temperature measurement lens.

[0009] Preferably, the temperature measuring lens includes an optical system, a photoelectric detector, a signal amplifier, and a signal processing and display output part, wherein the optical system is responsible for gathering the infrared radiation energy of the diamond, the photoelectric detector converts the received infrared radiation into an electrical signal, the signal amplifier and the signal processing circuit processes and calculates the electrical signal, and finally displays the temperature value of the diamond on an external display device through the display output part.

[0010] Preferably, the standard for adjusting the front and rear position of the base is to make the axis of the observation window and the axis of the temperature measuring lens on the same front view plane.

[0011] Preferably, the standard for moving the base left and right is that the distance from the temperature measuring lens to the diamond is greater than the minimum detection distance and less than the maximum detection distance.

[0012] The beneficial effects of the present invention are as follows: the temperature of the diamond on the molybdenum base during its growth process can be accurately measured; by enlarging the size of the observation window, the temperature measuring point is prevented from falling on the observation window wall, which causes inaccurate temperature measurement; a spring device is fixed on the temperature measuring lens, and the position of the temperature measuring point is adjusted by utilizing the expansion and contraction of the spring device, thereby improving the limitation of the small measurement position area under the prior art, and solving the problem that the temperature measuring point moves with the growth thickness during the diamond growth process, thereby avoiding the problem that polycrystalline growth will occur on the surface of the single-crystal diamond due to inaccurate temperature measurement, thereby reducing the quality of the diamond and increasing the cutting loss, thereby further improving the quality of the diamond. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shown is a schematic diagram of the arrangement of the measuring device in the method for measuring the temperature of diamond growth of the present invention.

[0014] Explanation of the reference numerals: 1. base; 2. vertical support rod; 3. measuring rod; 4. temperature measuring lens; 5. spring device; 6. measuring box; 7. observation window; 8. screw; 9. molybdenum base. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] See also Figure 1 The present invention provides an embodiment: a method for measuring the temperature of diamond growth, comprising the following steps: Step 1: Design a measuring device for measuring the growth temperature of diamond, the measuring device comprising a base 1 and a measuring box 6; a vertical support rod 2 is fixedly connected to the upper end of the base 1; a measuring rod 3 is rotatably connected to the upper end of the vertical support rod 2; a temperature measuring lens 4 is fixedly connected to the end of the measuring rod 3, the lower part of the temperature measuring lens 4 is connected to one end of a spring device 5, and the other end of the spring device 5 is fixedly connected to the vertical support rod 2; an observation window 7 is provided at the left end of the measuring box 6; a screw 8 is installed in the spring device 5; a molybdenum base 9 is provided in the measuring box 6; Step 2: Fix the base 1 on the left side of the measuring box 6, adjust the front and rear position of the base 1, then move the base 1 left and right, fix the base 1 at a suitable position, loosen the screw 8, adjust the position of the temperature measuring lens 4 by the extension and contraction of the spring device 5 until the temperature measuring position requirement is met, tighten the screw 8, and the temperature measuring lens 4 receives the infrared radiation emitted by the diamond and converts it into a temperature value; Step 3: As the diamond grows thicker, fine-tune the movement of the temperature measuring lens 4 by means of screw 8 so that the temperature is measured at the center of the diamond surface.

[0017] Among them, the temperature measuring lens 4 and the observation window 7 both adopt a design of high on the left and low on the right, and the diameter of the temperature measuring lens 4 is smaller than the diameter of the observation window 7. The temperature measuring position requirement is: the infrared light emitted by the diamond at the upper end of the molybdenum base 9 passes through the observation window 7 and is focused on the temperature measuring lens 4.

[0018] At the same time, the temperature measuring lens includes an optical system, a photoelectric detector, a signal amplifier, and a signal processing and display output part. The optical system is responsible for gathering the infrared radiation energy of the diamond, the photoelectric detector converts the received infrared radiation into an electrical signal, the signal amplifier and the signal processing circuit processes and calculates the electrical signal, and finally displays the temperature value of the diamond on an external display device through the display output part.

[0019] In addition, the standard for adjusting the front and rear position of the base 1 is: to make the axis of the observation window 7 and the axis of the temperature measuring lens 4 on the same front view plane, and the standard for moving the base 1 left and right is: the distance from the temperature measuring lens 4 to the diamond is greater than the minimum detection distance and less than the maximum detection distance.

[0020] The work includes the following steps: Step 1: Design a measuring device for measuring the growth temperature of diamond, the measuring device comprising a base 1 and a measuring box 6; a vertical support rod 2 is fixedly connected to the upper end of the base 1; a measuring rod 3 is rotatably connected to the upper end of the vertical support rod 2; a temperature measuring lens 4 is fixedly connected to the end of the measuring rod 3, the lower part of the temperature measuring lens 4 is connected to one end of a spring device 5, and the other end of the spring device 5 is fixedly connected to the vertical support rod 2; an observation window 7 is arranged at the left end of the measuring box 6; a screw 8 is installed in the spring device 5; a molybdenum base 9 is arranged in the measuring box 6; the temperature measuring lens 4 and the observation window 7 are both designed to be high on the left and low on the right, and the diameter of the temperature measuring lens 4 is smaller than the diameter of the observation window 7; Step 2: Fix the base 1 on the left side of the measuring box 6, adjust the front and rear position of the base 1, and the standard for adjusting the front and rear position of the base 1 is: make the axis of the observation window 7 and the axis of the temperature measuring lens 4 on the same front view plane, and then move the base 1 left and right. The standard for moving the base 1 left and right is: the distance from the temperature measuring lens 4 to the diamond is greater than the minimum detection distance and less than the maximum detection distance. Fix the base 1 at a suitable position, loosen the screw 8, and adjust the position of the temperature measuring lens 4 by the extension and contraction of the spring device 5 until the temperature measurement position requirement is met, and then tighten the screw 8. The temperature measurement position requirement is: the infrared light emitted by the diamond at the upper end of the molybdenum base 9 passes through the observation window 7 and focuses on the temperature measuring lens 4. The temperature measuring lens 4 receives the infrared radiation emitted by the diamond and converts it into a temperature value. The temperature measuring lens includes an optical system, a photoelectric detector, a signal amplifier, and a signal processing and display output part, wherein the optical system is responsible for converging the infrared radiation energy of the diamond, the photoelectric detector converts the received infrared radiation into an electrical signal, the signal amplifier and the signal processing circuit process and calculate the electrical signal, and finally the temperature value of the diamond is displayed on an external display device through the display output part; Step 3: As the diamond grows thicker, fine-tune the movement of the temperature measuring lens 4 by means of screw 8 so that the temperature is measured at the center of the diamond surface.

[0021] Through the above steps, the temperature conditions during the growth of diamonds on the molybdenum base 9 can be accurately measured, which improves the limitation of the small measurement position area under the existing technology, and solves the problem that the temperature measuring point moves with the growth thickness during the diamond growth process, avoids the problem of polycrystalline growth on the surface of single-crystal diamond due to inaccurate temperature measurement, reduces the quality of diamond, and increases cutting loss. The quality of diamond is further improved to solve the problem that the temperature measuring point moves with the growth thickness during the diamond growth process, and the temperature measurement may be inaccurate.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A method for measuring the temperature of diamond growth, characterized in that: The steps include: Step 1: Design a measuring device for measuring the growth temperature of diamond, the measuring device comprising a base (1) and a measuring box (6); the upper end of the base (1) is fixedly connected to a vertical support rod (2); the upper end of the vertical support rod (2) is rotatably connected to a measuring rod (3); the end of the measuring rod (3) is fixedly connected to a temperature measuring lens (4), the lower end of the temperature measuring lens (4) is connected to one end of a spring device (5), and the other end of the spring device (5) is fixedly connected to the vertical support rod (2); an observation window (7) is provided at the left end of the measuring box (6); a screw (8) is installed in the spring device (5); and a molybdenum base (9) is provided in the measuring box (6); Step 2: Fix the base (1) on the left side of the measuring box (6), adjust the front and rear position of the base (1), then move the base (1) left and right, fix the base (1) at a suitable position, loosen the screw (8), adjust the position of the temperature measuring lens (4) by the extension and contraction of the spring device (5), until the temperature measuring position requirement is met, tighten the screw (8), and the temperature measuring lens (4) receives the infrared radiation emitted by the diamond and converts it into a temperature value; Step 3: As the diamond grows thicker, the temperature measuring lens (4) is fine-tuned by means of the screw (8) so that the temperature is measured at the center of the diamond surface.

2. The method for measuring the temperature of diamond growth according to claim 1, characterized in that: The temperature measuring lens (4) and the observation window (7) are both designed to be higher on the left and lower on the right, and the diameter of the temperature measuring lens (4) is smaller than the diameter of the observation window (7).

3. The method for measuring the temperature of diamond growth according to claim 1, characterized in that: The temperature measurement position requirement is that the infrared light emitted by the diamond on the upper end of the molybdenum base (9) passes through the observation window (7) and is focused on the temperature measurement lens (4).

4. The method for measuring the temperature of diamond growth according to claim 1, characterized in that: The temperature measuring lens (4) comprises an optical system, a photoelectric detector, a signal amplifier and a signal processing and display output part, wherein the optical system is responsible for gathering the infrared radiation energy of the diamond, the photoelectric detector converts the received infrared radiation into an electrical signal, the signal amplifier and the signal processing circuit processes and calculates the electrical signal, and finally displays the temperature value of the diamond on an external display device through the display output part.

5. The method for measuring the temperature of diamond growth according to claim 1, characterized in that: The standard for adjusting the front and rear position of the base (1) is to make the axis of the observation window (7) and the axis of the temperature measuring lens (4) on the same front view plane.

6. The method for measuring the temperature of diamond growth according to claim 1, characterized in that: The standard for moving the base (1) left and right is that the distance from the temperature measuring lens (4) to the diamond is greater than the minimum detection distance and less than the maximum detection distance.

Images