Device for testing porosity of silicon oxide ceramic

Abstract

The utility model discloses a porosity testing device for silicon oxide ceramics, relates to the technical field of fastener production, and can solve the problem that the porosity testing device for silicon oxide ceramics is lacked at present. The porosity testing device of the silicon oxide ceramic comprises a closed box body with a cavity inside, and a heating structure and a weighing module which are arranged in the closed box body, the air exhaust end of the air exhaust assembly is communicated with the inner cavity of the closed box body, and the water outlet end of the water supply assembly extends to the position over the weighing assembly. The weighing module comprises a buoyant weight weighing assembly for testing the buoyant weight of the silicon oxide ceramic sample.

Description

TECHNICAL FIELD

[0001] The utility model relates to ceramic matrix composite detection technical field, concretely relates to a kind of porosity test device of silicon oxide ceramics. BACKGROUND

[0002] At present, silicon oxide ceramic material is unique and superior physical, chemical and mechanical properties and characteristics. In the field of aviation, plays an important role. Because its preparation process is complex and long cycle, the problem of non-uniform porosity is easily generated in material, porosity as one of the key performance indicators of silicon oxide ceramic material, directly affect the strength, toughness, thermal conductivity and other characteristics of material, this needs to understand its internal problems by detecting the porosity of silicon oxide ceramics, therefore, the accurate test of ceramic material porosity has important technical significance to ceramic performance. And at present, there is still lack of the porosity test device of silicon oxide ceramics, so that the current porosity test of silicon oxide ceramics is not only low in efficiency, and the accuracy of data is not easy to guarantee, therefore, developing new detection tool to improve efficiency and test accuracy becomes an important direction of technical development.

[0003] The inventor specially designs a kind of porosity test device of silicon oxide ceramics, solves the problem of lack of silicon oxide ceramic material porosity test device. CONTENT OF UTILITY MODEL

[0004] The purpose of the present application is to provide a kind of porosity test device of silicon oxide ceramics, solve the problem of lack of silicon oxide ceramic material porosity test device.

[0005] To solve the above technical problems, the utility model adopts the following scheme:

[0006] The present application provides a kind of porosity test device of silicon oxide ceramics, including the sealed box body with cavity in the inside, and heating structure and weighing module being set in the sealed box body;

[0007] It further includes the air extraction assembly that the inside cavity of sealed box body is communicated with, and the water supply assembly that water outlet end extends to the upper of weighing assembly;

[0008] The weighing module includes the floating weight weighing assembly that the floating weight of silicon oxide ceramic sample is tested.

[0009] Optionally, the heating structure is resistance wire that is arranged on the rear side wall and the left and right side walls of the sealed box body.

[0010] Optionally, the air extraction assembly includes air extraction pipe and vacuum pump, one end of air extraction pipe is communicated with the inside of sealed box body, and the other end is communicated with the air extraction end of vacuum pump;

[0011] It further includes the air pressure gauge that is arranged on air extraction pipe.

[0012] Optionally, the weighing module further comprises a placing table and a tray, and a weighing sensor arranged between the placing table and the tray.

[0013] The floating weight weighing assembly is arranged above the tray, and the water outlet end of the water feeding assembly is located between the tray and the floating weight weighing assembly.

[0014] Optionally, the floating weight weighing assembly comprises a sample box for being placed on the tray, and a hanging plate, a hanging basket and a pull cable, one end of the pull cable being fixed to the hanging plate and the other end being fixed to the hanging basket.

[0015] The water outlet end of the water feeding assembly is located directly above the sample box, and the sealed box body further comprises an upper bracket and a lower bracket arranged vertically and used for supporting the hanging plate.

[0016] The size of the hanging basket is smaller than that of the sample box.

[0017] In the case that the hanging plate is hung on the lower bracket, part or all of the hanging basket is immersed in the sample box.

[0018] In the case that the hanging plate is hung on the upper bracket, the bottom of the hanging basket is located directly above the top of the sample box.

[0019] Optionally, the pull cable is a steel wire rope or a nylon rope.

[0020] Optionally, the water feeding assembly comprises a water feeding pump and an L-shaped water feeding pipe, the water outlet end of the water feeding pipe being arranged downward and located directly above the sample box.

[0021] The hanging basket and the sample box are of the same shape, and are rectangular or circular.

[0022] Optionally, the sealed box body further comprises a temperature sensor.

[0023] Optionally, the front side of the sealed box body is provided with an openable and closable box door.

[0024] The present application has the following beneficial effects:

[0025] The present application can heat and dry the test sample through the heating structure, and then test the dry weight of the test sample, and then the air in the pores of the test sample is extracted through the water feeding assembly and the air extraction assembly, and then the pores are filled with water, so that the wet weight of the test sample is tested, and the floating weight of the test sample in water is tested through the floating weight weighing assembly, so that the porosity can be calculated according to the preset formula. Compared with the prior art, the present application provides a special test device with stable measurement, which can eliminate the interference of other factors as much as possible, and can ensure the accuracy of the measurement result of the porosity. The problem that there is currently a lack of a porosity test device for silicon oxide ceramic materials is solved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of this application.

[0027] Explanation of reference numerals in the attached diagram: 1-Sealed chamber, 2-Vacuum pump, 3-Water pump, 4-Placement platform, 5-Tray, 6-Weighing sensor, 7-Sample box, 8-Hanging basket, 9-Cable, 10-Hanging plate, 11-Upper bracket, 12-Lower bracket, 13-Heating structure, 14-Pressure gauge, 15-Temperature sensor. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0029] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] like Figure 1 As shown, this embodiment provides a porosity testing device for silica ceramics, including a sealed chamber 1 with an internal cavity, a heating structure 13 and a weighing module disposed within the sealed chamber 1.

[0033] It also includes an air extraction assembly whose air extraction end is connected to the internal cavity of the sealed box 1, and a water supply assembly whose water outlet end extends directly above the weighing assembly.

[0034] The weighing module comprises a buoyancy weight weighing assembly for weighing the buoyancy weight of the test silicon oxide ceramic sample.

[0035] The embodiment can first heat and dry the test sample through the heating structure 13, then remove the air in the pores of the test sample through the water feeding assembly and the air extraction assembly, and then fill the pores with water, so as to test the wet weight of the test sample, and the buoyancy weight of the test sample in water can be tested through the buoyancy weight weighing assembly, so that the porosity can be calculated according to a preset formula. Compared with the prior art, the application provides a special test device for stable measurement, which can eliminate the interference of other factors as much as possible and ensure the accuracy of the measurement result of the porosity. The problem that there is a lack of a test device for the porosity of silicon oxide ceramic material is solved.

[0036] Specifically, in the embodiment, the heating structure 13 is a resistance heating wire arranged on the rear side wall and the left and right side walls of the closed box body 1, which facilitates rapid heating of the inside of the closed box body 1.

[0037] Specifically, in the embodiment, the air extraction assembly comprises an air extraction pipe and a vacuum pump 2, one end of the air extraction pipe is in communication with the inside of the closed box body 1, and the other end is in communication with the air extraction end of the vacuum pump 2.

[0038] The air pressure gauge 14 arranged on the air extraction pipe facilitates monitoring of the air pressure in the inside of the closed box body 1.

[0039] Specifically, in the embodiment, the weighing module further comprises a placement table 4 and a tray 5, and a weighing sensor 6 arranged between the placement table 4 and the tray 5.

[0040] The buoyancy weight weighing assembly is arranged above the tray 5, the water outlet end of the water feeding assembly is located between the tray 5 and the buoyancy weight weighing assembly, and the weighing sensor 6 in the embodiment is a high-temperature-resistant weighing sensor 6, which is a prior component and will not be described here.

[0041] Specifically, in the embodiment, the buoyancy weight weighing assembly comprises a sample box 7 for being placed on the tray 5, a hanging plate 10, a hanging basket 8 and a cable 9, one end of the cable 9 is fixed to the hanging plate 10, and the other end is fixed to the hanging basket 8.

[0042] The water outlet end of the water feeding assembly is located directly above the sample box 7, and the inside of the closed box body 1 is further provided with an upper bracket 11 and a lower bracket 12 arranged vertically and used for supporting the hanging plate 10.

[0043] The size of the hanging basket 8 is smaller than the size of the sample box 7.

[0044] In the case that the hanging plate 10 is hung on the lower bracket 12, part of the area of the hanging basket 8 is immersed in the sample box 7.

[0045] In the case of hanging plate 10 is placed on the upper bracket 11, the bottom of the basket 8 is located directly above the top of the sample box 7, the whole of the basket 8 in this embodiment is made of steel mesh, which facilitates the water in the sample box 7 into the basket 8, in some embodiments, the steel mesh can also be provided only at the bottom of the basket 8.

[0046] Specifically, in this embodiment, the cable 9 is a steel wire rope, which ensures the tensile strength.

[0047] Specifically, in this embodiment, the water feeding assembly includes a water feeding pump 3 and a water feeding pipe shaped L, the water outlet end of the water feeding pipe is downwardly open and located directly above the sample box 7;

[0048] The shape of the basket 8 and the sample box 7 is the same, both are rectangular.

[0049] Specifically, in this embodiment, the inside of the sealed box body 1 is also provided with a temperature sensor, which facilitates the monitoring and control of the temperature.

[0050] Specifically, in this embodiment, the front side of the sealed box body 1 is provided with a openable and closable door (not shown in the figure), which facilitates various weighing operations.

[0051] In use, first, the dry weight of the sample is tested, first, the sample is placed inside the sealed box body 1, and the heating structure 13 is started to heat, the temperature inside the sealed box body 1 is maintained at 100+5℃, the test sample is dried, which lasts for about an hour, after the sample is cooled, it is weighed, the above drying step is repeated until its weight no longer changes, at this time, the dry weight data M1 is recorded, then the vacuum operation is carried out, the sample is placed into the sample box 7, then the vacuum pump 2 is opened, the air pressure inside the sealed box body 1 is lower than 2.5KPA, which is maintained for 15 minutes, so as to ensure that the air in the pores of the sample is extracted, then the water feeding assembly is used to add water to the sample box 7, then the air pressure inside the sealed box body 1 is gradually restored to normal pressure. And continue to soak the test sample for more than 30min, then place the hanging plate 10 on the lower bracket 12, so that the bottom of the basket 8 is immersed in water, then place the sample in the basket 8, and perform the first floating weight weighing, which is recorded as M21, then take out the sample, and perform the second floating weight weighing, which is recorded as M22, the difference between the two is the floating weight M2, then take out the sample box 7 and the floating weight weighing assembly, wipe the surface of the sample dry, and perform the wet weight weighing, and record the data as M3, use the following formula to calculate: porosity=(M3-M1 / M3-M2)*100, and the porosity can be obtained.

[0052] It can be understood that the above implementation is only an exemplary embodiment for illustrating the principle of the present application, but the present application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. A porosity testing device for silicon oxide ceramic, characterized by, The application relates to a sealed box (1) with a cavity inside, a heating structure (13) and a weighing module arranged in the sealed box (1). The application also relates to an air extraction assembly connected to the cavity inside the sealed box (1) and a water supply assembly with a water outlet arranged above the weighing module. The weighing module comprises a floating weight weighing assembly for testing the floating weight of a silicon oxide ceramic sample.

2. The porosity testing apparatus for a silicon oxide ceramic according to claim 1, characterized by The heating structure (13) is a resistance heating wire arranged on the rear wall and the left and right side walls of the sealed box (1).

3. The porosity testing apparatus for silicon oxide ceramic according to claim 1, wherein The air extraction assembly comprises an air extraction pipe and a vacuum pump (2), one end of the air extraction pipe is connected to the cavity inside the sealed box (1), and the other end is connected to the air extraction end of the vacuum pump (2). The application also comprises an air pressure gauge (14) arranged on the air extraction pipe.

4. The porosity testing apparatus for silicon oxide ceramics according to claim 1, characterized by The weighing module further comprises a placing table (4) and a tray (5), and a weighing sensor (6) arranged between the placing table (4) and the tray (5). The floating weight weighing assembly is arranged above the tray (5), and the water outlet of the water supply assembly is arranged between the tray (5) and the floating weight weighing assembly.

5. The apparatus for testing porosity of a silicon oxide ceramic according to claim 4, wherein The floating weight weighing assembly comprises a sample box (7) arranged on the tray (5), a hanging plate (10), a hanging basket (8) and a cable (9), one end of the cable (9) is fixed to the hanging plate (10), and the other end is fixed to the hanging basket (8). The water outlet of the water supply assembly is arranged above the sample box (7), and the sealed box (1) further comprises an upper bracket (11) and a lower bracket (12) arranged vertically and used for supporting the hanging plate (10). The size of the hanging basket (8) is smaller than that of the sample box (7). When the hanging plate (10) is arranged on the lower bracket (12), part or all of the hanging basket (8) is immersed in the sample box (7). When the hanging plate (10) is arranged on the upper bracket (11), the bottom of the hanging basket (8) is arranged above the top of the sample box (7).

6. The apparatus for testing porosity of a silicon oxide ceramic according to claim 5, wherein The cable (9) is a steel wire rope or a nylon rope.

7. The apparatus for testing porosity of a silicon oxide ceramic according to claim 5, wherein The water supply assembly comprises a water supply pump (3) and an L-shaped water supply pipe, the water outlet of the water supply pipe is arranged downward and above the sample box (7). The shapes of the hanging basket (8) and the sample box (7) are the same, and the shapes are rectangular or circular.

8. The porosity testing apparatus of a silicon oxide ceramic according to claim 1, wherein The sealed box (1) further comprises a temperature sensor.

9. The porosity testing apparatus of a silicon oxide ceramic according to claim 1, wherein The front side of the sealed box (1) is provided with a box door which can be opened and closed.

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