CN112067389B - Preparation method of soft material-containing detection sample for measuring heat conductivity coefficient - Google Patents
Preparation method of soft material-containing detection sample for measuring heat conductivity coefficient Download PDFInfo
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- CN112067389B CN112067389B CN202010933497.8A CN202010933497A CN112067389B CN 112067389 B CN112067389 B CN 112067389B CN 202010933497 A CN202010933497 A CN 202010933497A CN 112067389 B CN112067389 B CN 112067389B
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- sample
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- soft material
- outer diameter
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- 239000007779 soft material Substances 0.000 title claims abstract description 46
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000006260 foam Substances 0.000 claims abstract description 36
- 239000012774 insulation material Substances 0.000 claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000005520 cutting process Methods 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 13
- 239000006261 foam material Substances 0.000 claims description 10
- 239000011810 insulating material Substances 0.000 claims description 7
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 6
- 239000011496 polyurethane foam Substances 0.000 claims description 6
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000005464 sample preparation method Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/32—Polishing; Etching
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a preparation method of a soft material-containing detection sample for measuring a heat conductivity coefficient, and belongs to the field of composite material performance detection. According to the method, the periphery of the soft material-containing detection sample is replaced by the local hard foam heat insulation material, so that the problem that the thickness of the soft material-containing detection sample is reduced after being stressed and held in the heat conductivity coefficient measuring process is solved, and the accuracy of the heat conductivity coefficient test of the soft material-containing detection sample is improved. In addition, the method of the invention has the advantages of simplicity, rapidness, convenient operation and the like.
Description
Technical Field
The invention belongs to the field of composite material performance detection, and particularly relates to a preparation method of a soft material-containing detection sample for measuring a heat conductivity coefficient.
Background
At present, when the thermal conductivity coefficient test is carried out according to the GB/T10294-2008 standard, a material sample is usually directly cut into recommended dimensions specified by the standard, and then the material sample is subjected to a test and is not subjected to any treatment in the middle.
However, in the process of testing the heat conductivity coefficient according to the GB/T10294-2008 standard, a certain pretightening force is required to be applied to a sample, such as a soft material, and the sample is not subjected to hard support treatment, so that the thickness of the sample is easy to be reduced, the final heat conductivity coefficient testing result is affected, and the testing error is larger especially when the heat conductivity coefficient of the sample containing the high-foaming-rate heat insulation material is measured or the heat conductivity coefficient of the sample is measured in a high-temperature state.
Disclosure of Invention
The invention aims to provide a preparation method of a soft material-containing detection sample for measuring a heat conductivity coefficient so as to improve the test precision.
In order to achieve the above purpose, the invention adopts the following technical scheme:
A preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient comprises the following operation steps:
1) Processing and preparing a cutting sample containing soft materials according to the test requirements;
2) Round holes with the diameters of 10 mm-30 mm are respectively formed at four corners of the cut sample along the thickness direction, and the distances between the axes of the four holes and the two nearest edges are 20-30 mm;
3) Four cylindrical cushion blocks made of rigid foam materials with the heat conductivity coefficient not more than 0.08W/m.k are prepared, the round Kong Gaobu of the cut sample is smaller than 1mm, and the outer diameter is 10-33 mm;
4) Filling four cushion blocks of hard foam heat-insulating material into four round holes of a cutting sample respectively, wherein the four cushion blocks of hard foam heat-insulating material are matched in an interference manner in through holes of a soft material; the four cushion blocks of the rigid foam heat insulation material are at least 0.5mm higher than the surface of the cut sample with the round holes;
5) Polishing the cushion block of the hard foam heat-insulating material to enable the cushion block to be flush with the surface of the cut sample;
6) And (5) removing surface scraps and residues to finish the preparation of the soft material-containing detection sample for measuring the heat conductivity coefficient.
The invention relates to a preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient, which is characterized by comprising the following steps: the soft material-containing detection sample is made of soft materials; the circular hole of the cutting sample is a through hole in the thickness direction; the outer diameter of the cylindrical structure with the same outer diameter of the rigid foam heat insulation material cushion block is 1-3 mm larger than the diameter of the circular hole.
The invention relates to a preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient, which is characterized by comprising the following steps: the soft material-containing detection sample comprises a soft material layer and a hard material layer; the circular hole of the cutting sample is a through hole in the thickness direction; the hard foam heat insulation material cushion block consists of an upper section and a lower section of coaxial cylinders with different outer diameters, wherein the outer diameter of the cylinder with the larger outer diameter is 1 mm-3 mm larger than that of the circular hole; a cylinder of smaller outer diameter, the outer diameter of which is the same as the diameter of the circular hole.
The invention relates to a preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient, which is characterized by comprising the following steps: the soft material-containing detection sample comprises a soft material layer and a hard material layer; the circular hole of the cutting sample is only formed on the soft material layer of the cutting sample; the outer diameter of the cylindrical structure with the same outer diameter of the rigid foam heat insulation material cushion block is 1-3 mm larger than the diameter of the circular hole.
The invention relates to a preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient, which is characterized by comprising the following steps: the axis of the cutting sample is equal to the distance between the two nearest edges.
The invention relates to a preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient, which is characterized by comprising the following steps: the cushion block of the rigid foam heat insulation material is made of rigid polyurethane foam material or rigid phenolic foam material.
According to the method, the periphery of the soft material-containing detection sample is replaced by the local hard foam heat insulation material, so that the problem that the thickness of the soft material-containing detection sample is reduced after being stressed and held in the heat conductivity coefficient measuring process is solved, and the accuracy of the heat conductivity coefficient test of the soft material-containing detection sample is improved. In addition, the method of the invention has the advantages of simplicity, rapidness, convenient operation and the like.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Wherein, 1-cutting the sample and 2-hard foam heat insulation material cushion block.
Detailed Description
In order to facilitate the understanding of the present invention, the technical solutions of the present invention will be described below with reference to the drawings and examples for understanding of the heat insulating material and the related test field. The specific implementation process described below is not limited to the type and thickness of the soft insulation material sample, the position and size of the processing hole, the tool used for processing the hole, the type and processing size of the rigid foam insulation material, the tool used for cutting and polishing the rigid foam insulation material, and the like.
Example 1
The test specimen of this example comprises a cut specimen 1 and a rigid foam insulation pad 2, as shown in FIG. 1.
The cut sample 1 was made of a soft polyethylene foam material, and had an external dimension of 300mm×300mm×10mm, and circular through holes each having a diameter of 10mm were formed in the thickness direction at the four corners thereof, 20mm apart from the nearest two sides.
The cushion block 2 of the rigid foam heat insulation material is made of rigid polyurethane foam material with the heat conductivity coefficient of 0.08W/m.k, is cylindrical, and has the height of 10mm and the diameter of 11mm.
The cushion block 2 of the rigid foam heat insulation material is placed in four through holes at the corners of the cutting sample 1 in an interference fit and two-sided flush mode.
The test sample preparation method of this example is as follows:
Step 1) a10 mm thick flexible polyethylene foam sheet was cut into 300 mm. Times.300 mm. Times.10 mm cut sample 1.
Step 2) circular through holes with a diameter of 10mm are opened in the thickness direction at four corners of the cut sample 1, respectively, by means of a hole digger, as shown in fig. 1. The distance between the axes of the four through holes and the two nearest sides is 20mm.
Step 3) preparing 4 cylindrical rigid foam heat insulation material cushion blocks 2 with the height of 12mm and the diameter of 11mm from rigid polyurethane foam materials.
And 4) filling 4 cushion blocks 2 of the rigid foam heat insulation material into 4 circular through holes of the cutting sample 1 in an interference fit mode, wherein each end of each cushion block is 1mm higher than the surface of the cutting sample 1.
And 5) polishing the cushion block 2 made of the hard foam heat-insulating material so as to be flush with the upper surface and the lower surface of the cutting sample 1.
Step 6) removing the scraps and residues on the surface of the cut sample 1, and completing the preparation of the detection sample in the embodiment.
Example 2
The test specimen of this example comprises a cut specimen 1 and a rigid foam insulation pad 2.
The cutting sample 1 comprises a soft material layer and a hard material layer, wherein the external dimension is 300mm multiplied by 12mm, and the soft material layer is 7mm thick and is made of soft EVA foam material; the hard material layer is 8mm thick and is made of ceramic materials. Round through holes with the diameter of 30mm are respectively formed in the positions of the four corners and 30mm away from the nearest two sides along the thickness direction.
The cushion block 2 of the rigid foam heat insulation material is made of a rigid phenolic foam material with the heat conductivity coefficient of 0.06W/m.k and consists of an upper section and a lower section of coaxial cylindrical structure, wherein the height of the upper section of cylindrical structure is 8mm, the diameter of the upper section of cylindrical structure is 30mm, and the height of the lower section of cylindrical structure is 7mm, and the diameter of the lower section of cylindrical structure is 33mm.
The cushion block 2 of the rigid foam heat insulation material is placed in four through holes at the corners of the cutting sample 1 in an interference fit and two-sided flush mode.
The test sample preparation method of this example is as follows:
Step 1) a composite sample made of a 7mm thick EVA foam layer and an 8mm thick ceramic layer was processed into a cut sample 1 having dimensions 300mm by 15 mm.
And 2) adopting a water jet cutting processing mode, and respectively opening circular through holes with the diameter of 30mm at four corners of the cut sample 1 along the thickness direction. The axial center distance of the four through holes is 30mm from the two nearest sides of the cutting sample 1.
And 3) preparing 4 rigid polyurethane foam cushion blocks 2 with the height of 16mm and the diameter of 30mm from a rigid phenolic foam material, wherein the rigid polyurethane foam cushion blocks are composed of an upper section and a lower section of coaxial cylindrical structures, the height of the upper section of cylindrical structure is 8.5mm, the diameter of the upper section of cylindrical structure is 30mm, and the height of the lower section of cylindrical structure is 7.5mm, and the diameter of the lower section of cylindrical structure is 33mm.
Step 4), filling 4 cushion blocks 2 of the rigid foam heat insulation material into 4 circular through holes of a cutting sample 1 in an interference fit mode respectively; wherein the lower section cylinder structure is positioned in the soft material layer of the cutting sample 1, and the upper section cylinder structure is positioned in the hard material layer of the cutting sample 1; the cushion block 2 of the rigid foam heat insulating material is polished to be flush with the upper and lower surfaces of the cut sample 1.
And 5) removing scraps and residues on the surface of the cut sample 1 to finish the preparation of 1 soft heat insulation material heat conductivity coefficient sample.
Example 3
The difference from the second embodiment is that:
The circular through holes of the cut sample 1 are opened only in the soft material layer.
The rigid foam cushion block 2 is cylindrical, 7.5mm in height and 33mm in diameter.
Claims (3)
1. A preparation method of a soft material-containing detection sample for measuring heat conductivity coefficient comprises the following operation steps:
① Processing and preparing a cutting sample (1) containing soft materials according to test requirements, wherein the soft materials are soft polyethylene foam materials or soft EVA foam materials;
② Round holes with the diameters of 10 mm-30 mm are respectively formed at four corners of the cutting sample (1) along the thickness direction, and the distances between the axes of the four holes and the two nearest edges are 20-30 mm;
③ Four cylindrical cushion blocks (2) made of rigid foam materials with the heat conductivity coefficient not more than 0.08W/m.k are prepared, the round Kong Gaobu of the heat-conducting material is smaller than 1mm, and the outer diameter of the heat-conducting material is 10-33 mm;
④ Filling four cushion blocks (2) of rigid foam heat insulation materials into four round holes of a cutting sample (1) respectively, wherein the four round holes of the soft materials are matched in an interference manner; four cushion blocks (2) made of rigid foam heat insulation materials, which are at least 0.5mm higher than the surface with round holes of the cutting sample (1);
⑤ Polishing the cushion block (2) made of the rigid foam heat-insulating material to enable the cushion block to be flush with the surface of the cutting sample (1);
⑥ Removing surface scraps and residues to finish the preparation of the soft material-containing detection sample for measuring the heat conductivity coefficient;
the soft material-containing detection sample is made of soft materials; the circular hole of the cutting sample (1) is a through hole in the thickness direction; the rigid foam heat insulation material cushion block (2) is of a cylindrical structure with the same outer diameter, and the outer diameter of the rigid foam heat insulation material cushion block is 1-3 mm larger than the diameter of the circular hole;
Or, the soft material-containing detection sample comprises a soft material layer and a hard material layer; the circular hole of the cutting sample (1) is a through hole in the thickness direction; the rigid foam heat insulation material cushion block (2) consists of an upper section and a lower section of coaxial cylinders with different outer diameters, wherein the outer diameter of the cylinder with the larger outer diameter is 1 mm-3 mm larger than the diameter of the circular hole; a cylinder with smaller outer diameter, the outer diameter of which is the same as the diameter of the circular hole;
or, the soft material-containing detection sample comprises a soft material layer and a hard material layer; the round hole of the cutting sample (1) is only formed on the soft material layer; the rigid foam heat insulation material cushion block (2) is of a cylindrical structure with the same outer diameter, and the outer diameter of the rigid foam heat insulation material cushion block is 1-3 mm larger than the diameter of the circular hole.
2. The method for preparing a soft material-containing test sample for measuring thermal conductivity according to claim 1, wherein: the axis of the cutting sample (1) is equal to the distance between the two nearest edges.
3. The method for producing a soft material-containing test sample for thermal conductivity measurement according to any one of claims 1 to 2, wherein: the cushion block (2) of the rigid foam heat insulation material is made of rigid polyurethane foam material or rigid phenolic foam material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933497.8A CN112067389B (en) | 2020-09-08 | 2020-09-08 | Preparation method of soft material-containing detection sample for measuring heat conductivity coefficient |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010933497.8A CN112067389B (en) | 2020-09-08 | 2020-09-08 | Preparation method of soft material-containing detection sample for measuring heat conductivity coefficient |
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| Publication Number | Publication Date |
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| CN112067389A CN112067389A (en) | 2020-12-11 |
| CN112067389B true CN112067389B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010933497.8A Active CN112067389B (en) | 2020-09-08 | 2020-09-08 | Preparation method of soft material-containing detection sample for measuring heat conductivity coefficient |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115326874A (en) * | 2022-09-02 | 2022-11-11 | 山东非金属材料研究所 | Method for testing thermal diffusion coefficient of light-transmitting material based on laser flash method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410765A (en) * | 2001-10-10 | 2003-04-16 | 株式会社日立制作所 | Resin thermal impedance testing method and tester using same |
| CN104535609A (en) * | 2014-12-26 | 2015-04-22 | 怡维怡橡胶研究院有限公司 | Device for determining heat-conductivity coefficient |
| CN110044955A (en) * | 2019-02-15 | 2019-07-23 | 上海海事大学 | Sample holder and measurement method for steady state method measurement creamy material heating conduction |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288641B (en) * | 2011-08-18 | 2014-01-08 | 中国飞机强度研究所 | Method for measuring high temperature thermal conductivity coefficient |
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- 2020-09-08 CN CN202010933497.8A patent/CN112067389B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1410765A (en) * | 2001-10-10 | 2003-04-16 | 株式会社日立制作所 | Resin thermal impedance testing method and tester using same |
| CN104535609A (en) * | 2014-12-26 | 2015-04-22 | 怡维怡橡胶研究院有限公司 | Device for determining heat-conductivity coefficient |
| CN110044955A (en) * | 2019-02-15 | 2019-07-23 | 上海海事大学 | Sample holder and measurement method for steady state method measurement creamy material heating conduction |
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