Spherical and conical combined diamond anvil cell
By designing a diamond anvil with spherical and conical combination, the limitations of traditional diamond anvils in terms of optical performance and high-pressure anvil fit are solved, and higher optical penetration and signal acquisition intensity are achieved.
Patent Information
- Application Number
- CN202421542047.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-02
AI Technical Summary
Traditional diamond anvils have limitations in optical performance and high-pressure anvil matching, resulting in light reflection, small signal acquisition angle and unstable high-pressure anvil.
A diamond anvil with a spherical and conical combination was designed. By combining the spherical table of the diamond anvil with a conical waist and crown, the problem of light reflection and high-pressure anvil matching is solved.
It improves optical penetration and signal acquisition intensity, reduces light reflection, enhances the stability of high-pressure anvil and the quality of the spectral signal.
Smart Images
Figure CN222855347U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of diamond anvils, in particular to a diamond anvil of a spherical and conical combination. Background Art
[0002] The existing DAC (Diamond Anvil Cell) technology has the advantages of achieving static high pressure and being able to be used with a variety of testing instruments. Diamond, as the key material of the pressurized part, has become an indispensable high-pressure anvil material due to its ultra-high hardness, light transmittance, thermal conductivity and insulation properties.
[0003] Conventional flat-bottomed diamond anvil cells ( Figure 4 The three types of diamond anvils ( Figure 5 ) Although there are many designs, they all have a flat surface as the observation surface and light intake surface (such as Fig. 9 and Fig.10 As shown in the figure, in optics, when light hits a plane vertically during its forward motion, part of it will be reflected by the plane, while when it hits the plane obliquely, more light will be reflected. Even transparent flat objects will reflect light. Therefore, although traditional diamond anvils have excellent mechanical properties, they have certain limitations on light penetration, signal collection, and spectral analysis in experiments.
[0004] Traditional spherical diamond anvil cell ( Figure 7 ) Although the above optical reflection problem is solved, the diamond anvil and the tungsten carbide pad for supporting the diamond ( Figure 8 ) are all high-hardness materials, which are difficult to process to satisfactory spherical accuracy. Because of poor matching, it is difficult to apply ultra-high pressure.
[0005] The assembly of the traditional flat-bottomed diamond anvil and DAC (Diamond Anvil Cell) device is relatively simple, but it also has great limitations. In order to ensure strength, the size of the central light-transmitting hole is limited and cannot be made larger. The amount of light entering is small, and the signal collection angle is also small. At the same time, there will be reflection loss on the plane (such as Fig. 9 shown);
[0006] Conventional conical diamond anvil cell ( Figure 5 ) and DAC (Diamond Anvil Cell) device is relatively complicated to assemble. Fig.10 )'s conical surface meets the needs of a large table and a large light inlet, while also increasing support for the diamond. However, as light moves forward, it will be partially reflected by the plane if it hits the plane vertically, and more will be reflected if it hits the plane obliquely. At the same time, there will be reflection loss on the plane.
[0007] Traditional spherical diamond anvil cell ( Figure 3 ) and DAC (Diamond Anvil Cell) device is relatively complicated to assemble. Figure 8 ) to meet the needs of a large table and a large light inlet. At the same time, because the light path entrance is a spherical surface, even if the light is obliquely incident, the reflection can be reduced, and the signal can be amplified by a convex lens. However, since the diamond anvil and the tungsten carbide pad used to support the diamond are both high-hardness materials, it is difficult to machine them to a satisfactory spherical accuracy. Due to the insufficient machining accuracy, the fit is not good, resulting in non-surface contact (such as Fig.11 As shown), there will be a large contact stress at the contact position between the tungsten carbide pad and the diamond anvil spherical surface (as shown Fig.11 As shown in the figure, it is difficult to apply ultra-high pressure, and for this purpose a diamond anvil of a combination of a spherical surface and a conical surface is provided. Utility Model Content
[0008] The purpose of the utility model is to provide a diamond anvil with a spherical and conical combination to solve the problems raised by the above background technology in view of the defects of the prior art.
[0009] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a diamond anvil of a spherical and conical combination, comprising a diamond anvil body, a diamond anvil spherical table surface is provided at the bottom of the diamond anvil body, a diamond anvil waist is provided in the middle of the diamond anvil body, a diamond anvil crown is provided between the diamond anvil spherical table surface and the diamond anvil waist, a diamond anvil surface is provided at the top of the diamond anvil body, a diamond anvil bottom is provided between the diamond anvil surface and the diamond anvil waist, and the diamond anvil table surface is a spherical surface.
[0010] As a further improvement of the technical solution, the waist of the diamond anvil is cylindrical.
[0011] As a further improvement of the technical solution, the bottom of the diamond anvil is a conical body.
[0012] As a further improvement of the technical solution, the crown of the diamond anvil is in the shape of a truncated cone.
[0013] As a further improvement of the technical solution, the diamond anvil body is embedded in a tungsten carbide base.
[0014] Compared with the prior art, the utility model has the following beneficial effects: the spherical diamond anvil has a spherical arc surface diamond light inlet window during use, which is more suitable for light penetration and reduces light reflection. It also has a lens effect, which amplifies the returning light and can obtain better spectral signals. It is very helpful for experimental signal collection, and avoids the problem of processing accuracy of the full surface design, which causes insufficient pressure and causes fragmentation. The full mirror-polished spherical processing effect can minimize the reflection of light when light enters the diamond spherical surface from any angle. It can not only enter directly, but also enter obliquely, which has a better matching degree with special equipment, a larger signal collection angle, and better signal collection intensity. The new anvil surface processing method can be adjusted horizontally during the processing project, while ensuring excellent processing accuracy. The whole system brings a more efficient processing method, speeds up the production cycle, and brings customers a better service experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention is described in more detail below by way of example with reference to the accompanying drawings, in which:
[0016] Figure 1 This is a schematic diagram of the structure of the diamond anvil of the utility model;
[0017] Figure 2 This is a schematic diagram of the structure of the diamond anvil of the utility model installed on a tungsten carbide base;
[0018] Figure 3 This is a module diagram for detecting the diamond level before anvil surface processing of the utility model;
[0019] Figure 4 It is a traditional flat-bottomed diamond anvil in the background technology of the present utility model;
[0020] Figure 5 It is a traditional conical diamond anvil in the background technology of the utility model;
[0021] Figure 6 It is a traditional conical pad in the background technology of the utility model;
[0022] Figure 7 It is a traditional spherical diamond in the background technology of the utility model;
[0023] Figure 8 It is a traditional spherical diamond pad in the background technology of the utility model;
[0024] Fig. 9 It is a schematic diagram of the combination of a conventional flat-bottomed diamond anvil and a pad in the background technology of the present utility model;
[0025] Fig.10It is a schematic diagram of the combination of a conventional conical diamond anvil and a tungsten carbide pad in the background technology of the present utility model;
[0026] Fig.11 It is a contact diagram of a diamond anvil and a tungsten carbide pad for supporting diamond in the background technology of the utility model.
[0027] The meanings of the numbers in the figure are: 1: diamond anvil spherical table, 2: diamond anvil crown, 3: diamond anvil waist, 4: diamond anvil bottom, 5: diamond anvil surface, 6: tungsten carbide base. DETAILED DESCRIPTION
[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0029] Example: Figure 1-2 As shown, a diamond anvil of a spherical and conical combination comprises a diamond anvil body, a diamond anvil spherical table 1 is provided at the bottom of the diamond anvil body, a diamond anvil waist 3 is provided in the middle of the diamond anvil body, a diamond anvil crown 2 is provided between the diamond anvil spherical table 1 and the diamond anvil waist 3, a diamond anvil surface 5 is provided at the top of the diamond anvil body, a diamond anvil bottom 4 is provided between the diamond anvil surface 5 and the diamond anvil waist 3, and the diamond anvil table 1 is a spherical surface.
[0030] The diamond anvil waist 3 is cylindrical.
[0031] The bottom 4 of the diamond anvil is a 16-sided cone.
[0032] The diamond anvil crown 2 is in the shape of a truncated cone.
[0033] The diamond anvil body is embedded in the tungsten carbide base 6 .
[0034] Working principle: A diamond anvil that is a combination of a spherical surface and a conical surface. It solves the problem of light reflection on a flat surface by using the "spherical diamond anvil table", and solves the problem of matching the diamond anvil with the pad by combining the "cone-shaped diamond anvil crown".
[0035] After the diamond anvil spherical surface is completed, there is no reference surface for the diamond anvil surface processing. Traditional diamond anvils use the flat table as the reference surface to process the diamond anvil surface and verify the parallelism of the diamond anvil surface. The spherical table cannot match the parallelism of the anvil surface. Figure 3As shown in the figure: In actual operation, two light sources are used to illuminate the waist of the spherical diamond anvil to observe whether the returned light is in the same path as the outgoing light. If they are the same path, it means that the diamond is level. If they are different, the diamond clamping level is fine-tuned to the same path, and then the anvil surface is processed. After the processing is completed, the spherical diamond anvil is installed in the DAC (Diamond Anvil Cell) diamond anvil cavity, and it is fitted with the diamond anvil surface at the other end to observe the interference fringes and verify again whether the diamond anvil surface is parallel. After two verifications, the parallelism of the diamond anvil surface is ensured to be correct.
[0036] The processing of spherical diamond anvils can be divided into 7 steps: 1. Raw material processing; 2. Welding; 3. Waist grinding; 4. Surface grinding; 5. Spherical arc surface processing; 6. Bottom grinding; 7. Anvil surface grinding. The processing order is waist, surface, spherical arc surface, bottom, anvil surface. First, the target diameter of the diamond anvil is achieved, and then the crown and spherical arc surface are processed to ensure the overall processing accuracy of the diamond anvil. The entire processing process is formed in one step.
[0037] Step 1: Process the diamond raw material to a suitable size;
[0038] Step 2: Weld the rough diamond material to the machine body.
[0039] Step 3: Process the diamond into a cylindrical waist with a specified diameter;
[0040] Step 4: Processing the diamond into a conical crown;
[0041] Step 5: Process the diamond into a spherical arc surface with a mirror effect;
[0042] Step 6: Process the diamond into a 16-sided bottom;
[0043] Step 7: Process the diamond into anvil surface.
[0044] During use, the spherical diamond anvil has a spherical arc surface diamond light inlet window, which is more suitable for light penetration and reduces light reflection. It also has a lens effect, which amplifies the returning light and can obtain better spectral signals. It is very helpful for experimental signal collection and avoids the breakage caused by insufficient pressure due to the processing accuracy problem of the full surface design.
[0045] The full mirror-polished spherical processing effect can minimize the reflection of light when the light enters the diamond spherical surface from any angle. It can not only enter directly, but also enter obliquely, which is better for matching special equipment, with a larger signal collection angle and better signal collection intensity.
[0046] The new anvil surface processing method can be adjusted horizontally during the processing process, ensuring excellent processing accuracy. The whole system brings a more efficient processing method, speeds up the production cycle, and brings customers a better service experience.
[0047] Compared with the prior art, this diamond anvil can solve the following problems:
[0048] 1. Improve the optical performance of diamond anvil cells in DAC experiments, solve the problem of light reflection and refraction on a plane, improve optical penetration, and improve signal acquisition and spectral analysis intensity.
[0049] 2. Solve the non-surface contact between spherical diamond anvil and tungsten carbide pad due to machining accuracy problems.
[0050] 3. Solve the processing technology problems of the circular arc surface of the diamond anvil, from the flat surface to the spherical surface, and from the spherical frosted surface to the spherical mirror polished surface.
[0051] 4. Solve the parallelism problem between the diamond anvil surface and the flat table. The spherical table cannot match the parallelism of the diamond anvil surface. Through a new verification method, solve the spherical diamond anvil surface processing problem and verify the parallelism problem of the diamond anvil surface.
[0052] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.
Claims
1. A diamond anvil of a spherical and conical combination, comprising a diamond anvil body, a diamond anvil spherical table (1) is provided at the bottom of the diamond anvil body, a diamond anvil waist (3) is provided in the middle of the diamond anvil body, a diamond anvil crown (2) is provided between the diamond anvil spherical table (1) and the diamond anvil waist (3), a diamond anvil surface (5) is provided at the top of the diamond anvil body, and a diamond anvil bottom (4) is provided between the diamond anvil surface (5) and the diamond anvil waist (3), characterized in that: The diamond anvil spherical table (1) is a spherical surface.
2. The diamond anvil of the spherical and conical combination according to claim 1, characterized in that: The diamond anvil waist (3) is cylindrical.
3. The diamond anvil of the spherical and conical combination according to claim 1, characterized in that: The bottom (4) of the diamond anvil is a 16-sided cone.
4. The diamond anvil of the spherical and conical combination according to claim 1, characterized in that: The diamond anvil crown (2) is in the shape of a truncated cone.
5. The diamond anvil of the spherical and conical combination according to claim 1, characterized in that: The diamond anvil body is embedded in a tungsten carbide base (6).