WO2023193366A1

WO2023193366A1 - Testing device

Info

Publication number: WO2023193366A1
Application number: PCT/CN2022/106552
Authority: WO
Inventors: 王善民; 周雪峰; 马德江; 顾超; 赵予生
Original assignee: 南方科技大学
Priority date: 2022-04-07
Filing date: 2022-07-19
Publication date: 2023-10-12
Also published as: CN216449047U

Abstract

A testing device, relating to the technical field of cavity testing. The testing device comprises an assembly body (100), a hollow pressure transmission medium block (200), a first electric conductor (300), a second electric conductor (400), and a temperature measurement assembly (500). The first electric conductor (300) and the second electric conductor (400) are arranged on the inner side of the hollow pressure transmission medium block (200) at intervals. The assembly body (100) is provided between the first electric conductor (300) and the second electric conductor (400). The assembly body (100) comprises a first conductive portion (110), a second conductive portion (120), a thermal insulation assembly (130), and a heating body (140). The first conductive portion (110) and the second conductive portion (120) are respectively arranged at two ends of the heating body (140), and the thermal insulation assembly (130) is sleeved on the heating body (140). The temperature measurement assembly (500) comprises a temperature measurement element (510) and a connecting pipe (520) wrapping the temperature measurement element (510), and the connecting pipe (520) passes through the assembly body (100). By increasing the contact area between the conductive sheets (113, 123) and the conductive columns (111, 121), the contact resistance at the interface is reduced, so as to reduce the heat generated by the conductive columns (111, 121) and the conductive sheets (113, 123) at the contact position, and prevent the conductive sheets from being burnt through at a current greater than 600 A, thereby improving the temperature upper limit of the device.

Description

a test device

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 202220782321.1 and titled "A Testing Device" submitted to the China Patent Office on April 7, 2022, the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the technical field of cavity testing, and in particular to a testing device.

Background technique

With a certain sample volume and extreme high-pressure and high-temperature conditions at the same time, it is very necessary to heat the high-pressure cavity to a high temperature above 4000K. This is very important for studying refractory compounds and the growth of single crystals under high pressure.

However, for most large cavity press devices, the heating capacity usually does not exceed 2600K, mainly because it is very challenging to design a cavity with a heating circuit that can withstand large currents and a thermal insulation layer that can effectively improve thermal efficiency. sex.

Since the cavity needs to provide ultra-high current (hundreds of amperes) during the heating process, and there is a certain contact resistance between the components involved in conduction in the heating circuit, a large amount of heat will be generated under the action of high current. As a result, the contact position burns through and the upper temperature limit cannot be increased. At the same time, the selection of insulation materials inside the cavity will also affect the upper temperature limit of the cavity to a certain extent. For example, pyrophyllite, which is currently the most widely used, often undergoes phase changes at high temperatures and even melts at extremely high temperatures. These Factors will affect the upper temperature limit of the cavity.

Therefore, for a large-cavity six-sided press device, it is worth studying how to expand the upper temperature limit of the sample cavity based on the centimeter scale.

Contents of the invention

In view of this, the purpose of this application is to provide a testing device to overcome the deficiencies in the prior art.

This application provides the following technical solution: a test device, including an assembly, a hollow pressure transmission dielectric block, a first conductor, a second conductor and a temperature measurement component;

The first conductor and the second conductor are spaced apart and arranged inside the hollow pressure transmitting dielectric block;

The assembly is disposed between the first conductor and the second conductor;

The assembly includes a first conductive part, a second conductive part, a heat preservation component and a heating body;

The first conductive part and the second conductive part are respectively provided at both ends of the heating body, and the heat preservation component is sleeved on the heating body;

The temperature measuring assembly includes a temperature measuring element and a connecting pipe wrapped around the temperature measuring element. The connecting pipe is passed through the assembly, and both ends of the connecting pipe are inserted into the hollow pressure transmission medium respectively. piece;

Both ends of the temperature measuring element are respectively arranged inside the hollow pressure transmission medium block.

In some embodiments of the present application, the first conductive part includes a first conductive pillar, a first support piece and a first conductive piece;

One end of the first conductive pillar is connected to the heating body, and the other end of the first conductive pillar is connected to the first support sheet. The first conductive sheet is stacked on the first support sheet away from the One side of the first conductive pillar.

Optionally, the second conductive part includes a second conductive pillar, a second support piece and a second conductive piece;

One end of the second conductive pillar is connected to the heating body, the other end of the second conductive pillar is connected to the second support sheet, and the second conductive sheet is stacked on the second support sheet away from the One side of the second conductive pillar.

Optionally, the insulation component includes an insulation tube, a first gasket and a second gasket, the first gasket and the second gasket being respectively provided at both ends of the insulation tube;

The insulation tube is set on the heating body, and the first gasket is set on the first conductive column and the first support piece;

The second gasket is sleeved on the second conductive pillar and the second support piece.

Optionally, the orthographic projection of the first conductive sheet in the axial direction of the first support sheet completely covers the first support sheet and the first gasket.

Optionally, the orthographic projection of the second conductive sheet in the axial direction of the second support sheet completely covers the second support sheet and the second gasket.

Optionally, the first gasket, the second gasket and the insulation tube are coaxially arranged.

Optionally, the heating body includes a hollow cylinder and an inclusion body, and the inclusion body is filled inside the hollow cylinder.

Optionally, the hollow cylinder is a graphite hollow cylinder.

Optionally, the connecting tube is located between the first conductive part and the second conductive part.

The embodiments of the present application have the following advantages: by adding a first support piece between the first conductive sheet and the first conductive pillar, and adding a second support sheet between the second conductive sheet and the second conductive pillar, the number of The contact area between the first conductive sheet and the first conductive pillar, and between the second conductive sheet and the second conductive pillar greatly reduces the contact resistance at the interface, thereby reducing the contact resistance between the first conductive sheet and the second conductive sheet. The heat generated at the position prevents the first conductive sheet and the second conductive sheet from burning through when the current is greater than 600A, improves the stability of the first conductive sheet and the second conductive sheet, thereby increasing the upper temperature limit of the device.

In order to make the above objects, features and advantages of the present application more obvious and understandable, preferred embodiments are cited below and described in detail with reference to the attached drawings.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 shows a schematic structural diagram of a testing device provided by some embodiments of the present application;

Figure 2 shows a cross-sectional view of part A-A in Figure 1;

Figure 3 shows a schematic structural diagram of a testing device provided by some embodiments of the present application from another perspective;

Figure 4 shows a schematic structural diagram of an assembly in a testing device provided by some embodiments of the present application; and

FIG. 5 shows a cross-sectional view of part B-B in FIG. 4 .

Description of main component symbols:

100-Assembly; 200-Hollow pressure transmitting dielectric block; 300-First conductor; 400-Second conductor; 500-Temperature measurement component; 110-First conductive part; 120-Second conductive part; 130-Insulation Component; 140-heating body; 510-temperature measuring element; 520-connecting pipe; 131-insulation pipe; 132-first gasket; 133-second gasket; 111-first conductive column; 112-first support piece; 113 -First conductive sheet; 121-Second conductive pillar; 122-Second support sheet; 123-Second conductive sheet; 141-Hollow cylinder; 142-Inclusion.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right" and similar expressions are used herein for illustrative purposes only.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection" and "fixing" should be understood broadly. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Furthermore, the terms “first” and “second” are used for descriptive purposes only and shall not be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the template is for the purpose of describing specific embodiments only and is not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in Figures 1 to 3, some embodiments of the present application provide a testing device, which is mainly used in the study of high temperature and high pressure in centimeter-scale sample cavities. The test device includes an assembly 100 , a hollow pressure transmitting dielectric block 200 , a first conductor 300 , a second conductor 400 and a temperature measurement component 500 . Among them, the temperature measurement component 500 is used to monitor the temperature change of the heating body 140 . The first conductor 300 and the second conductor 400 are configured to be connected to an external power source, and current passes through the assembly 100, causing the assembly 100 to generate heat under the action of the current.

The first conductor 300 and the second conductor 400 are spaced apart inside the hollow pressure transmitting dielectric block 200 . It should be noted that the shape of the hollow pressure transmitting medium block 200 can be a central cylinder or a central polygonal prism, which can be specifically set according to the actual situation.

In addition, in some embodiments of the present application, the shape of the hollow pressure-transmitting medium block 200 is a cubic structure with a central opening, and the hollow pressure-transmitting medium block 200 is made of pyrophyllite, that is, the hollow pressure-transmitting medium block 200 is hollow. Pyrophyllite. Pyrophyllite is a kind of clay mineral with fine texture and low hardness. The newly developed pyrophyllite mine has a reserve capacity of 2 million tons. Among them, the aluminum content reaches 30%-39%, Fe2O3+TI2O<0.2%, and it is suitable for artificial synthesis. Blanks (molds) for diamond, ceramics, refractory materials, fiberglass, engraving stones, etc.

At the same time, the assembly 100 is disposed between the first conductor 300 and the second conductor 400 . If necessary, it should be noted that the assembly 100 is a conductive structure, and the outer wall of the assembly 100 conflicts with the inner wall of the hollow pressure transmitting dielectric block 200 .

Specifically, the first conductor 300 and the second conductor 400 respectively conflict with both ends of the assembly 100, and the first conductor 300 and the second conductor 400 can be connected to an external power supply respectively, so that the external power supply A current flows through the assembly 100 through the first conductor 300 and the second conductor 400, and causes the assembly 100 to generate heat under the action of the current.

The assembly 100 includes a first conductive part 110 , a second conductive part 120 , a heat preservation component 130 and a heating body 140 . It can be understood that the heat preservation component 130 reduces the heat loss of the heating body 140 during the heating process and improves the heat preservation quality of the heating body 140 .

By arranging the first conductive part 110 and the second conductive part 120 at both ends of the heating body 140, external power can flow through the heating body 140 through the first conductive part 110 and the second conductive part 120, so as to The heating body 140 is caused to generate heat under the action of electric current.

At the same time, the heat preservation component 130 is sleeved on the heating body 140, and the heat preservation component 130 reduces the heat loss of the heating body 140, thereby improving the heating efficiency of the heating body 140.

It should be noted that the heating body 140 has a cylindrical structure made of a material that is resistant to high temperatures and has conductive properties.

In some embodiments of the present application, the temperature measuring assembly 500 includes a temperature measuring element 510 and a connecting tube 520 wrapped around the temperature measuring element 510, and the connecting tube 520 passes through the assembly 100. It can be understood that the connecting tube 520 passes through the assembly body 100, and the two ends of the connecting tube 520 are located outside the assembly body 100 respectively. At the same time, insert both ends of the connecting pipe 520 into the hollow pressure transmitting medium block 200 respectively.

It can be understood that mounting holes are provided on opposite sides of the inner wall of the hollow pressure transmitting medium block 200, so that both ends of the connecting pipe 520 are respectively disposed in the mounting holes.

At the same time, the two ends of the temperature measuring element 510 are respectively arranged inside the hollow pressure transmission medium block. Specifically, one end of the temperature-sensing element passes through one side of the hollow pressure-transmitting medium block 200 and is attached to the outer wall of one side of the hollow pressure-transmitting medium block 200. The other end of the temperature-sensing element passes through the other side of the hollow pressure-transmitting medium block 200. And it is attached to the outer wall of the other side of the hollow pressure transmitting medium block 200, and the two ends of the temperature sensing element are connected to the multi-channel recorder through the hammer head, and the temperature change of the temperature measuring element 510 is recorded, so as to realize the heating body 140°C temperature calibration.

It should be noted that in some embodiments of the present application, the connecting pipe 520 is a ceramic pipe to improve the high temperature resistance of the connecting pipe 520 and improve the stability of the connecting rod under high temperature conditions.

Among them, ceramics have many advantages such as excellent insulation, corrosion resistance, high temperature resistance, high hardness, low density and radiation resistance. With the rise of high-tech industry, various new special ceramics have also achieved great development, and ceramics have become increasingly outstanding. structural and functional materials. They have higher temperature resistance, mechanical properties, special electrical properties and excellent chemical resistance than traditional ceramics.

The temperature measuring element 510 wrapped in a ceramic tube can be used to calibrate the temperature of the cavity inside the heating body 140 .

In some embodiments of the present application, the temperature measuring element 510 is a thermocouple.

Thermocouple (thermocouple) is a commonly used temperature measuring element 510 in temperature measuring instruments. It directly measures temperature, converts the temperature signal into a thermoelectromotive force signal, and converts it into the temperature of the measured medium through an electrical instrument (secondary instrument).

As shown in Figures 2, 4 and 5, in some embodiments of the present application, the heating body 140 includes a hollow cylinder 141 and an inclusion 142, and the inclusion 142 is filled in the hollow cylinder 141. inside, and the sample is wrapped by the inclusion 142.

It should be noted that in some embodiments of the present application, the inclusion 142 is hexagonal boron nitride. Hexagonal boron nitride is a white crystal with a melting point of nearly 3000°C. It is resistant to high temperatures, has extremely stable chemical properties, is resistant to strong acid corrosion, and has high electrical insulation properties.

In addition, the sample is wrapped in the inclusion body 142, and the sample is prevented from being contaminated by the heating body 140 through the inclusion body 142, thereby improving the stability of the sample within the inclusion body 142.

In some embodiments of the present application, the hollow cylinder 141 is a graphite hollow cylinder 141 made of graphite. It should be noted that the electrical conductivity of graphite is one hundred times higher than that of ordinary non-metallic minerals. Thermal conductivity exceeds that of steel, iron, lead and other metal materials. The melting point of graphite is 3850±50℃. Even after ultra-high temperature arc burning, the weight loss is very small and the thermal expansion coefficient is also very small. The strength of graphite increases as the temperature increases. At 2000°C, the strength of graphite doubles.

As shown in FIGS. 4 and 5 , in some embodiments of the present application, the first conductive part 110 includes a first conductive pillar 111 , a first support piece 112 and a first conductive piece 113 .

One end of the first conductive pillar 111 is connected to the heating body 140 , and the first conductive pillar 111 and the heating body 140 can be connected by bonding or integral molding.

The other end of the first conductive pillar 111 is connected to the first support piece 112, and may also be connected by bonding or integral molding. It should be noted that the axis of the first support piece 112 is coaxially arranged with the first conductive column 111, the diameter of the first support piece 112 is larger than the diameter of the first conductive column 111, and the diameter of the first support piece 112 is smaller than the heating diameter. Body 140 in diameter.

In addition, the first conductive sheet 113 is stacked on the side of the first support sheet 112 away from the first conductive pillar 111 . It should be noted that the axis of the first conductive sheet 113 coincides with the axis of the first conductive pillar 111 , and the diameter of the first conductive sheet 113 is larger than the diameter of the heating body 140 . It can be understood that the orthographic projection of the first conductive sheet 113 along the axial direction of the heating body 140 completely covers the heating body 140 .

Specifically, the first support sheet 112 is a graphite sheet. By disposing the first support sheet 112 between the first conductive pillar 111 and the first conductive sheet 113, the gap between the first conductive pillar 111 and the first conductive sheet 113 is reduced. The contact resistance between the first conductive pillar 111 and the first conductive sheet 113 is reduced, thereby preventing the first conductive sheet 113 from burning through when the current is greater than 600A, and improving the first conductive sheet 113 Tablet 113 stability.

By adding the first support sheet 112 made of graphite between the first conductive pillar 111 and the first conductive sheet 113, the contact area between the first conductive sheet 113 and the first support sheet 112 is not only increased, but also greatly reduced. The contact resistance at the contact interface between the first conductive sheet 113 and the first support sheet 112 is reduced, thereby eliminating the heat generated at the contact position between the first conductive pillar 111 and the first conductive sheet 113, and improving the performance of the first conductive sheet 113. Stability during power-on.

As shown in FIGS. 2 and 5 , in some embodiments of the present application, the second conductive part 120 includes a second conductive pillar 121 , a second support piece 122 and a second conductive piece 123 .

One end of the second conductive pillar 121 is connected to the heating body 140 , and the second conductive pillar 121 and the heating body 140 can be connected by bonding or integral molding.

The other end of the second conductive pillar 121 is connected to the second support piece 122, and may also be connected by bonding or integral molding. It should be noted that the axis of the second support piece 122 is coaxially arranged with the second conductive column 121, the diameter of the second support piece 122 is larger than the diameter of the second conductive column 121, and the diameter of the second support piece 122 is smaller than the heating diameter. Body 140 in diameter.

In addition, the second conductive sheet 123 is stacked on the side of the second support sheet 122 away from the second conductive pillar 121 . It should be noted that the axis of the second conductive sheet 123 coincides with the axis of the second conductive pillar 121 , and the diameter of the second conductive sheet 123 is larger than the diameter of the heating body 140 . It can be understood that the orthographic projection of the second conductive sheet 123 along the axial direction of the heating body 140 completely covers the heating body 140 .

It should be noted that in some embodiments of the present application, the heating body 140 has a cylindrical structure, and the axis of the first conductive pillar 111, the axis of the heating body 140 and the axis of the second conductive pillar 121 coincide.

In addition, the diameter of the first conductive pillar 111 is equal to the diameter of the second conductive pillar 121 , and the diameter of the first conductive pillar 111 is smaller than the diameter of the heating body 140 .

Specifically, the second support sheet 122 is a graphite sheet. By disposing the second support sheet 122 between the second conductive pillar 121 and the second conductive sheet 123, the gap between the second conductive pillar 121 and the second conductive sheet 123 is reduced. The contact resistance between the second conductive pillar 121 and the second conductive sheet 123 is reduced, thereby preventing the second conductive sheet 123 from burning through when the current is greater than 600A, and improving the second conductive Tablet 123 stability.

By adding the second support sheet 122 made of graphite between the second conductive pillar 121 and the second conductive sheet 123, the contact area between the second conductive sheet 123 and the second support sheet 122 is not only increased, but also greatly reduced. The contact resistance at the contact interface between the second conductive sheet 123 and the second support sheet 122 is reduced, thereby eliminating the heat generated at the contact position between the second conductive pillar 121 and the second conductive sheet 123, and improving the performance of the second conductive sheet 123. Stability during power-on.

As shown in Figure 5, in some embodiments of the present application, the insulation assembly 130 includes an insulation tube 131, a first gasket 132 and a second gasket 133. The first gasket 132 and the second gasket 133 are respectively provided. at both ends of the insulation tube 131.

It should be noted that the outer diameters of the first gasket 132 and the second gasket 133 are equal to the outer diameter of the thermal insulation tube 131 , and the first gasket 132 , the second gasket 133 and the thermal insulation tube 131 are coaxially arranged.

Wherein, the insulation tube 131 is sleeved on the heating body 140 . It can be understood that the inner wall of the insulation tube 131 conflicts with the outer wall of the heating body 140 . Specifically, the length of the thermal insulation tube 131 along its axial direction is not less than the length of the heating body 140 along its axial direction, so that the thermal insulation tube 131 is completely wrapped around the circumference of the heating body 140 to improve the thermal insulation of the heating body 140 by the thermal insulation tube 131 . quality.

In addition, the first gasket 132 is sleeved on the first conductive pillar 111 and the first support piece 112 to form a cylindrical structure. It should be noted that the first gasket 132 , the first conductive pillar 111 and the first support piece 112 are coaxially arranged, and the sum of the height of the first conductive pillar 111 and the thickness of the first support piece 112 is equal to the thickness of the first gasket 132 .

The second gasket 133 is sleeved on the second conductive pillar 121 and the second support piece 122 to form a cylindrical structure. It should be noted that the second gasket 133, the second conductive pillar 121 and the second support piece 122 are coaxially arranged. The sum of the height of the second conductive pillar 121 and the thickness of the second support piece 122 is equal to the thickness of the second gasket 133 .

Specifically, the insulation tube 131 is a zirconium dioxide tube. Among them, zirconium dioxide is the main oxide of zirconium. It is usually a white, odorless and tasteless crystal, and is insoluble in water, hydrochloric acid and dilute sulfuric acid. It is chemically inactive and has high melting point, high resistivity, high refractive index and low thermal expansion coefficient, making it an important high temperature resistant material, ceramic insulation material and ceramic sunscreen agent.

In addition, the first gasket 132 and the second gasket 133 are respectively zirconium dioxide gaskets made of zirconium dioxide.

It should be noted that the orthographic projection of the first conductive sheet in the axial direction of the first support sheet completely covers the first support sheet and the first gasket. The orthographic projection of the second conductive sheet in the axial direction of the second support sheet completely covers the second support sheet and the second gasket.

As shown in FIGS. 2 and 5 , in some embodiments of the present application, the side of the first conductive sheet 113 close to the heating body 140 is connected to the first support sheet 112 and the first gasket 132 respectively. conflict. The first conductive sheet 113 may be connected to the first supporting sheet 112 by bonding or integral molding.

In addition, the side of the second conductive piece 123 close to the heating body 140 conflicts with the second support piece 122 and the second gasket 133 respectively. The second conductive sheet 123 can also be connected to the second supporting sheet 122 by bonding or integral molding.

It should be noted that both the first conductive sheet 113 and the second conductive sheet 123 are molybdenum sheets. Among them, after the molybdenum sheet has been rolled with a deformation of more than 60%, the density of the molybdenum sheet is basically close to the theoretical density of molybdenum. Therefore, it has high strength, uniform internal structure and excellent high-temperature creep resistance, and is therefore known as It is widely used in the production of reflective screens and covers in sapphire crystal growth furnaces, reflective screens, heating belts, connectors in vacuum furnaces, sputtering targets for plasma coating, high-temperature resistant boats and other products.

In some embodiments of the present application, the connecting tube 520 is located between the first conductive part 110 and the second conductive part 120 . In order to improve the accuracy of temperature calibration in the cavity of the heating body 140 , the axis of the connecting pipe 520 intersects the axis of the heating body 140 , and the axis of the connecting pipe 520 is perpendicular to the axis of the heating body 140 .

Specifically, the heating body 140 is formed by filling the detection sample into the hollow cylinder 141 through the inclusion body 142 . The first conductor 300 and the second conductor 400 are connected to the external power supply respectively, so that the external current flows through the heating body 140, so that the temperature of the heating body 140 gradually increases under the action of the current. By wrapping the heat preservation component 130 in the heating The circumferential direction of the body 140 greatly improves the heating efficiency of the heating body 140 under the action of electric current.

The temperature in the cavity of the heating body 140 is calibrated through the temperature measuring element 510. At the same time, the sample is wrapped in the hollow cylinder 141 through the inclusion 142 made of hexagonal boron nitride to prevent the sample from being absorbed by the hollow cylinder made of graphite. The body 141 is contaminated and the stability of the sample in the inclusion body 142 is improved.

By placing the device into a press, six hammer heads pressurize the six sides of the pyrophyllite assembly block. When the preset pressure is reached, the hammer heads that are in conflict with the first conductor 300 and the second conductor 400 are energized and heat the cavity of the heating body 140. At the same time, the hammer heads that are in conflict with both ends of the temperature measuring element 510 are The head is connected to a multi-channel recorder and records the temperature of the thermocouple to achieve temperature calibration of the cavity of the heating body 140 and determine whether the sample is melted based on the sudden change in the resistance of the press circuit. Through this device, the upper temperature limit of the high-temperature cavity can reach 4000K, far exceeding the 2600K of most similar cavities currently.

In all examples shown and described herein, any specific values are to be construed as illustrative only and not as limiting, and therefore other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

The above-described embodiments only express several implementation modes of the present application. The descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present application. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the protection scope of the present application.

Claims

A testing device, characterized in that it includes an assembly, a hollow pressure transmission dielectric block, a first conductor, a second conductor and a temperature measurement component;

The first conductor and the second conductor are spaced apart and arranged inside the hollow pressure transmitting dielectric block;

The assembly is disposed between the first conductor and the second conductor;

The assembly includes a first conductive part, a second conductive part, a heat preservation component and a heating body;

The first conductive part and the second conductive part are respectively provided at both ends of the heating body, and the heat preservation component is sleeved on the heating body;

The temperature measuring assembly includes a temperature measuring element and a connecting pipe wrapped around the temperature measuring element. The connecting pipe is passed through the assembly, and both ends of the connecting pipe are inserted into the hollow pressure transmission medium respectively. blocks; and

Both ends of the temperature measuring element are respectively arranged inside the hollow pressure transmission medium block.
The testing device according to claim 1, wherein the first conductive part includes a first conductive pillar, a first support piece and a first conductive piece;

One end of the first conductive pillar is connected to the heating body, and the other end of the first conductive pillar is connected to the first support sheet. The first conductive sheet is stacked on the first support sheet away from the One side of the first conductive pillar.
The testing device according to claim 2, wherein the second conductive part includes a second conductive pillar, a second support piece and a second conductive piece;

One end of the second conductive pillar is connected to the heating body, the other end of the second conductive pillar is connected to the second support sheet, and the second conductive sheet is stacked on the second support sheet away from the One side of the second conductive pillar.
The testing device according to claim 3, wherein the insulation component includes an insulation tube, a first gasket and a second gasket, and the first gasket and the second gasket are respectively arranged on both sides of the insulation tube. end;

The insulation tube is set on the heating body, and the first gasket is set on the first conductive column and the first support piece;

The second gasket is sleeved on the second conductive pillar and the second support piece.
The testing device according to claim 4, wherein the orthographic projection of the first conductive sheet in the axial direction of the first support sheet completely covers the first support sheet and the first gasket.
The testing device according to claim 4, wherein the orthographic projection of the second conductive sheet in the axial direction of the second support sheet completely covers the second support sheet and the second gasket.
The testing device according to claim 4, wherein the first gasket, the second gasket and the insulation tube are coaxially arranged.
The testing device according to claim 1, wherein the heating body includes a hollow cylinder and an inclusion body, and the inclusion body is filled inside the hollow cylinder.
The testing device according to claim 8, wherein the hollow cylinder is a graphite hollow cylinder.
The testing device according to any one of claims 1 to 9, wherein the connecting tube is located between the first conductive part and the second conductive part.