Testing device and testing method for low-volatile condensate of heat-conducting silica gel material

Abstract

The invention provides a testing device and a testing method for a low-volatile condensate of a heat-conducting silica gel material. The testing device comprises a heating table, a collecting pipe, a watch glass and a microgravity sensor, the collecting pipe is vertically arranged on the surface of the heating table; the watch glass cover is arranged at the end part, far away from the heating table, of the collecting pipe; the microgravity sensor is arranged on the surface, in contact with the watch glass, of the collecting pipe, and the microgravity sensor is used for detecting the weight change of the watch glass; when the heat-conducting silica gel material is tested through the testing device, the heat-conducting silica gel material is placed on the surface of the heating table, the collecting pipe and the watch glass cover are arranged above the heat-conducting silica gel material, and the heating table heats the heat-conducting silica gel material at a target testing temperature. According to the invention, the low-volatile condensate generated by the heat-conducting silica gel material can be detected efficiently, accurately and intuitively, and the testing efficiency and testing precision of the heat-conducting silica gel material are improved.

Description

Technical Field

[0001] The present application relates to the technical field of thermal conductive material testing, and in particular to a low-volatile condensate testing device and a testing method for thermal conductive silicone material. Background Art

[0002] Thermally conductive silicone materials are a type of highly efficient thermal interface material that has been widely used in the fields of electronic products, power equipment, etc. They are usually made of thermally conductive fillers (such as aluminum powder, alumina, etc.) and organic polymer matrices (such as silicone rubber), have high thermal conductivity and low stress, can maintain close contact with heating and cooling devices, and conduct heat quickly.

[0003] Thermally conductive silicone materials may produce low-volatile condensate during use. Low-volatile condensate refers to liquid or solid substances formed by cooling or condensation of volatile substances in thermally conductive silicone materials after heating and evaporation under high temperature conditions. Usually, these substances have low volatility and are not easy to evaporate at room temperature. Only under high temperature conditions can they show obvious volatilization or condensation. The accumulation of low-volatile condensate may affect the performance of the material and even cause contamination of electronic equipment or other precision components.

[0004] Detecting low-volatile condensates generated by thermally conductive silicone materials is crucial to ensuring product yield. However, there is currently no device on the market that can efficiently and accurately detect low-volatile condensates generated by thermally conductive silicone materials. Summary of the invention

[0005] In view of the above-mentioned problems, the present application is proposed to provide a low-volatile condensate testing device and a testing method for thermally conductive silicone materials that overcome the problems or at least partially solve the problems, including:

[0006] A low-volatile condensate testing device for thermally conductive silica gel material, comprising: a heating table, a collecting tube, a watch glass and a microgravity sensor;

[0007] The collecting tube is vertically arranged on the surface of the heating platform; the watch glass cover is arranged at the end of the collecting tube away from the heating platform; the microgravity sensor is arranged on the surface of the collecting tube in contact with the watch glass, and the microgravity sensor is used to detect the weight change of the watch glass;

[0008] When the thermally conductive silicone material is tested by the testing device, the thermally conductive silicone material is placed on the surface of the heating table, the collecting tube and the surface dish cover are arranged above the thermally conductive silicone material, and the heating table heats the thermally conductive silicone material at a target test temperature.

[0009] Preferably, the heating platform comprises a base, a controller, a heater and a heat conducting plate; the controller and the heater are both arranged inside the base; the heat conducting plate is arranged on the surface of the base and connected to the heater; the controller is electrically connected to the heater.

[0010] Preferably, the heating platform further comprises a button and a display screen; the button and the display screen are both arranged on the surface of the base; and the controller is electrically connected to the button and the display screen respectively.

[0011] Preferably, the heat conduction plate is provided with more than two heat conduction zones; and the heat conduction zones are connected to the heaters in a one-to-one correspondence.

[0012] Preferably, the testing device further comprises: a semiconductor cooling sheet; the semiconductor cooling sheet is arranged on the surface of the watch dish.

[0013] Preferably, the cross section of the collecting tube gradually decreases from the end away from the watch glass to the end close to the watch glass.

[0014] Preferably, a middle portion of the watch glass is convex toward the collecting tube.

[0015] Preferably, the collecting tube and the watch glass are both made of transparent glass.

[0016] Preferably, the collecting tube is detachably connected to the watch glass.

[0017] A testing method based on the testing device described in any one of the above items, comprising:

[0018] Placing a thermally conductive silicone material on the surface of a heating platform, and placing a collection tube and a watch glass cover above the thermally conductive silicone material;

[0019] The thermally conductive silica gel material is heated at a target test temperature by a heating table, and a weight change of the watch glass is detected by a microgravity sensor;

[0020] When the weight change of the watch glass is greater than a preset change value, observe whether there is condensate on the surface of the watch glass. If no condensate is present, the watch glass is judged as qualified; if condensate is present, the watch glass is judged as unqualified.

[0021] This application has the following advantages:

[0022] In view of the problem that the prior art is difficult to efficiently and accurately detect the low-volatile condensate generated by the thermally conductive silicone material, the present application provides a solution of setting a collection tube and a watch glass to collect the low-volatile substances of the thermally conductive silicone material, and setting a microgravity sensor to detect the weight change of the watch glass to accurately sense the generation of condensate, specifically: a low-volatile condensate testing device for thermally conductive silicone material, comprising: a heating table, a collection tube, a watch glass and a microgravity sensor; the collection tube is vertically arranged on the surface of the heating table; the watch glass cover is arranged at the end of the collection tube away from the heating table; the microgravity sensor is arranged on the surface of the collection tube that contacts the watch glass, and the microgravity sensor is used to detect the weight change of the watch glass; when the thermally conductive silicone material is tested by the testing device, the thermally conductive silicone material is placed on the surface of the heating table, the collection tube and the watch glass cover are arranged above the thermally conductive silicone material, and the heating table heats the thermally conductive silicone material at a target test temperature.

[0023] By setting up a collection tube and a watch glass to collect low-volatile substances of the thermally conductive silicone material, and setting up a microgravity sensor to detect the weight change of the watch glass, it is convenient to efficiently, accurately and intuitively detect the low-volatile condensates produced by the thermally conductive silicone material, thereby improving the test efficiency and test accuracy of the thermally conductive silicone material. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of a low-volatile condensate testing device for a thermally conductive silicone material provided in one embodiment of the present application;

[0026] Figure 2 It is a flowchart of the steps of a method for testing low-volatile condensate of a thermally conductive silicone material provided in one embodiment of the present application.

[0027] The reference numerals in the drawings of the specification are as follows:

[0028] 10. Heating table; 11. Base; 12. Heat conducting plate; 13. Button; 14. Display screen; 20. Collection tube; 30. Surface dish; 40. Microgravity sensor; 50. Thermal conductive silicone material. DETAILED DESCRIPTION

[0029] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0030] By analyzing the prior art, the inventors found that the existing low-volatile condensate detection relies on manual observation. Since the heating test time of the thermally conductive silicone material is relatively long (generally 3 to 24 hours), the labor intensity of the inspectors is relatively high, and the changes in the accumulation of condensate may not be observed in time, thus missing the best time to record and affecting the accuracy of the test results.

[0031] Reference Figure 1 In one embodiment of the present application, a low-volatile condensate testing device of a thermally conductive silicone material is provided, comprising: a heating platform 10, a collecting tube 20, a watch glass 30 and a microgravity sensor 40;

[0032] The collecting tube 20 is vertically arranged on the surface of the heating platform 10; the watch glass 30 is covered on the end of the collecting tube 20 away from the heating platform 10; the microgravity sensor 40 is arranged on the surface of the collecting tube 20 that contacts the watch glass 30, and the microgravity sensor 40 is used to detect the weight change of the watch glass 30;

[0033] When the thermally conductive silicone material 50 is tested by the testing device, the thermally conductive silicone material 50 is placed on the surface of the heating platform 10, the collecting tube 20 and the surface dish 30 are covered above the thermally conductive silicone material 50, and the heating platform 10 heats the thermally conductive silicone material 50 at the target test temperature.

[0034] It should be noted that the microgravity sensor 40 is a sensor that can accurately measure the slight weight change of an object, can work in a low gravity environment or under conditions of slight gravity change, and is usually used in high-precision measurement occasions. The microgravity sensor 40 is provided with one or more than two, and the surface of the collection tube 20 in contact with the watch glass 30 is provided with a groove that can accommodate the microgravity sensor 40, so that the watch glass 30 can contact the microgravity sensor 40 to transmit the weight change, and at the same time, the end of the collection tube 20 is covered to form a relatively closed gas collection space.

[0035] As an example, three microgravity sensors 40 are provided and arranged around the watch glass 30. By arranging the microgravity sensors 40 at multiple different positions on the surface of the collection tube 20, the accumulation of condensate on the watch glass 30 can be detected more accurately, and even if the condensate in some areas is unevenly distributed, the multiple microgravity sensors 40 can provide comprehensive weight data, reducing errors caused by position deviation or local accumulation.

[0036] By setting up a collection tube 20 and a surface dish 30 to collect low-volatile substances of the thermally conductive silicone material 50, and setting up a microgravity sensor 40 to detect the weight change of the surface dish 30, it is convenient to efficiently, accurately and intuitively detect the low-volatile condensate generated by the thermally conductive silicone material 50, thereby improving the test efficiency and test accuracy of the thermally conductive silicone material 50.

[0037] Next, the testing device provided by this exemplary embodiment will be further described.

[0038] In one embodiment of the present application, the microgravity sensor 40 is electrically connected to the image collector and the indicator light through the control end. When the microgravity sensor 40 detects that the weight change of the surface dish 30 is greater than the preset change value, the control end automatically records the time data, and starts the image collector to take a photo of the surface dish 30, and starts the indicator light to prompt the tester. Through automated recording and prompting, the safety of the test process can be ensured, the accuracy of the test results can be improved, and it is suitable for efficient and accurate data collection and analysis needs.

[0039] In one embodiment of the present application, the heating platform 10 includes a base 11, a controller, a heater and a heat conducting plate 12; the controller and the heater are both arranged inside the base 11; the heat conducting plate 12 is arranged on the surface of the base 11 and connected to the heater; the controller is electrically connected to the heater. The controller can adjust the output power of the heater according to the preset test temperature to achieve precise control of the heating process.

[0040] In one embodiment of the present application, the heating platform 10 further includes a button 13 and a display screen 14; the button 13 and the display screen 14 are both arranged on the surface of the base 11; the controller is electrically connected to the button 13 and the display screen 14, respectively. The button 13 is used for the user to interact with the heating platform 10, so that the user can manually set the temperature, time or other parameters. The user can start or stop the heating process or perform other necessary operations through the button 13. The display screen 14 is used to display the working status of the heating platform 10 in real time, including the current temperature, set temperature, heating time or other operation information, so that the user can understand the operating status of the heating platform 10.

[0041] In one embodiment of the present application, the heat conducting plate 12 is provided with more than two heat conducting areas; the heat conducting areas are connected to the heaters one by one. By dividing the heat conducting plate 12 into a plurality of heat conducting areas, each heat conducting area is heated separately by the heater, so that the transfer and distribution of heat can be more accurately controlled, which is suitable for the scenario where multiple heat conducting silicone materials 50 need to be tested at different temperatures.

[0042] In one embodiment of the present application, the testing device further comprises: a semiconductor cooling sheet; the semiconductor cooling sheet is arranged on the surface of the watch glass 30. Specifically, the cooling surface of the semiconductor cooling sheet is in contact with the surface of the watch glass 30. By arranging the semiconductor cooling sheet, the temperature of the watch glass 30 can be effectively reduced, and the condensation efficiency of low volatile matter on the watch glass 30 can be improved.

[0043] In one embodiment of the present application, the cross section of the collecting tube 20 gradually decreases from the end away from the watch glass 30 to the end close to the watch glass 30. Specifically, the collecting tube 20 is a cone or a similar tapered shape. The tapered design of the collecting tube 20 can promote the low volatiles to be concentrated to the narrowest part of the collecting tube 20, that is, below the watch glass 30, so as to improve the collection efficiency of the low volatiles.

[0044] In one embodiment of the present application, the middle of the watch glass 30 is raised toward the collecting tube 20 to form an arched structure. The raised design of the watch glass 30 can ensure that the condensate is concentrated at one vertex under the action of gravity, so that the inspector can observe and record more intuitively.

[0045] In one embodiment of the present application, the collection tube 20 and the watch glass 30 are both made of transparent glass. By using transparent glass material, the inspector can observe the state of the thermally conductive silicone material 50 and the low-volatile condensate more intuitively.

[0046] In one embodiment of the present application, the collecting tube 20 is detachably connected to the watch glass 30. The detachable design improves the convenience of cleaning and maintaining the watch glass 30.

[0047] Reference Figure 2 In one embodiment of the present application, a testing method based on the testing device described in any of the above embodiments is also provided, including:

[0048] S110, placing the heat-conducting silicone material 50 on the surface of the heating platform 10, and placing the collecting tube 20 and the watch glass 30 above the heat-conducting silicone material 50;

[0049] S120, heating the thermally conductive silicone material 50 at a target test temperature by means of the heating platform 10, and detecting a weight change of the watch glass 30 by means of the microgravity sensor 40;

[0050] S130, when the weight change of the watch glass 30 is greater than a preset change value, observe whether there is condensate on the surface of the watch glass 30, and if there is no condensate, determine it as qualified, and if there is condensate, determine it as unqualified.

[0051] Next, the testing method provided by this exemplary embodiment will be further described.

[0052] As described in step S110 , the thermally conductive silicone material 50 is placed on the surface of the heating platform 10 , and the collecting tube 20 and the watch glass 30 are placed above the thermally conductive silicone material 50 .

[0053] Wipe the heating platform 10, the collecting tube 20, the watch glass 30 and the microgravity sensor 40 with alcohol in advance, place the thermal conductive silicone material 50 (make sure the sample thickness is greater than or equal to 2 mm, and it can be stacked if the thickness is not enough) on the surface of the heating platform 10, cover the collecting tube 20 and the watch glass 30 embedded with the microgravity sensor 40 above the thermal conductive silicone material 50, and adjust the microgravity sensor 40 to zero.

[0054] As described in step S120 , the thermally conductive silicone material 50 is heated at a target test temperature by the heating platform 10 , and the weight change of the watch glass 30 is detected by the microgravity sensor 40 .

[0055] The heat-conductive silicone material 50 is heated at a preset test temperature by the heating table 10 (it can be heated continuously or for a preset test time), and the weight change of the watch glass 30 is continuously detected by the microgravity sensor 40.

[0056] As described in step S130, when the weight change of the watch glass 30 is greater than the preset change value, observe whether there is condensate on the surface of the watch glass 30. If there is no condensate, it is determined to be qualified; if there is condensate, it is determined to be unqualified.

[0057] When the weight change of the watch dish 30 is greater than a preset change value (eg, 0.05-0.1 g), observe whether there is condensate on the surface of the watch dish 30. If no condensate is present, the watch dish 30 is judged as qualified; if condensate is present, the watch dish 30 is judged as unqualified.

[0058] To ensure the accuracy of the test data, more than two repeated samples can be taken during the test. If all samples are qualified, the final result is qualified; if any sample is unqualified, the final result is unqualified.

[0059] The above embodiments are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to in detail.

[0060] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the interpretation of the attached claims includes the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0061] Finally, it should be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or terminal device including the elements.

[0062] The above is a detailed introduction to the low volatile condensate test device and test method of a thermally conductive silicone material provided by the present application. The present specification uses specific embodiments to illustrate the principles and implementation methods of the present application. The above embodiments are only used to help understand the method and core ideas of the present application. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A low-volatile condensate testing device for thermally conductive silicone materials, characterized in that: include: heating stage, collection tubes, watch glasses, and microgravity sensors; The collecting tube is vertically arranged on the surface of the heating platform; the watch glass cover is arranged at the end of the collecting tube away from the heating platform; the microgravity sensor is arranged on the surface of the collecting tube in contact with the watch glass, and the microgravity sensor is used to detect the weight change of the watch glass; When the thermally conductive silicone material is tested by the testing device, the thermally conductive silicone material is placed on the surface of the heating table, the collecting tube and the surface dish cover are arranged above the thermally conductive silicone material, and the heating table heats the thermally conductive silicone material at a target test temperature.

2. The testing device according to claim 1, characterized in that: The heating platform comprises a base, a controller, a heater and a heat conducting plate; the controller and the heater are both arranged inside the base; the heat conducting plate is arranged on the surface of the base and connected to the heater; the controller is electrically connected to the heater.

3. The testing device according to claim 2, characterized in that: The heating platform further comprises a button and a display screen; the button and the display screen are both arranged on the surface of the base; and the controller is electrically connected to the button and the display screen respectively.

4. The testing device according to claim 2, characterized in that: The heat conduction plate is provided with more than two heat conduction areas; the heat conduction areas are connected to the heaters in a one-to-one correspondence.

5. The testing device according to claim 1, characterized in that: Also includes: Semiconductor refrigeration sheet; the semiconductor refrigeration sheet is arranged on the surface of the watch dish.

6. The testing device according to claim 1, characterized in that: The cross section of the collecting tube gradually decreases from the end away from the watch glass to the end close to the watch glass.

7. The testing device according to claim 1, characterized in that: The middle portion of the watch glass protrudes toward the collecting tube.

8. The testing device according to claim 1, characterized in that: The collecting tube and the watch glass are both made of transparent glass.

9. The testing device according to claim 1, characterized in that: The collecting tube is detachably connected to the watch glass.

10. A testing method based on the testing device according to any one of claims 1 to 9, characterized in that: include: Placing a thermally conductive silicone material on the surface of a heating platform, and placing a collection tube and a watch glass cover above the thermally conductive silicone material; The thermally conductive silica gel material is heated at a target test temperature by a heating table, and a weight change of the watch glass is detected by a microgravity sensor; When the weight change of the watch glass is greater than a preset change value, observe whether there is condensate on the surface of the watch glass. If there is no condensate, it is determined to be qualified; if there is condensate, it is determined to be unqualified.

Images