Device for measuring thermal coefficient

A technology of thermal conductivity and thermal insulation device, applied in the field of thermal conductivity measurement device, can solve the problems of insufficient thermal insulation performance, leaving air, affecting measurement accuracy, etc., to improve measurement accuracy and reliability, improve operability, and improve measurement. The effect of precision

Inactive Publication Date: 2005-08-24
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology

[0011] The method and device disclosed in the above-mentioned patents are easy to use, and the measurement cost is also low, but they have the following disadvantages: First, air will inevitably be left inside the device 9, which will affect the measurement accuracy, especially when the test sample is a jelly or porous object When, for example, heat-conducting glue, the sample contains a large amount of gas, which not only brings in gas, but also the thickness of the sample cannot be accurately measured due to the presence of gas, causing the existing measuring devi...

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  • Device for measuring thermal coefficient
  • Device for measuring thermal coefficient

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] see figure 1 , that is, a schematic perspective view of the first embodiment of the thermal conductivity measuring device 90 provided by the present invention. The device includes a thermal insulation device 100 and a presser 200 . The heat-insulated container 100 is a square airtight container, which has a movable upper cover 104, which can be opened or closed, so that items can be put in or taken out. In addition, an exhaust tube 106 penetrates the outer wall 102 of the heat insulating container 100 , so that one end thereof extends into the heat insulating container 100 , and the other end is connected to a vacuum device (not shown). The inside of the heat insulating container 100 may be evacuated.

[0025] see figure 2 , the heat-insulating container 100 has a double-layer structure, the inner layer is a thermal insulation layer 110, and the ...

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Abstract

The invention discloses a heat conducting coefficient measuring device which consists of a sealed heat insulation device and a vacuum system. The heat insulation device consists of heat source, two metal blocks, samples, a cooling device. The heat insulation device is made by spark-plasma sintering the aluminum oxide ceramic basal material with carbon nanometer tube uniformly arranged in with a intensity of 5 to 10 percent. The carbon nanometer tube distributes along the direction perpendicular to the direction which the heat travels. By pumping out the inner gas with the vacuum system, the adverse effect of the gas is eliminated which the carbon nanometer tube reflect the heat back in consequence that the carbon nanometer tube is radial heat insulation.

Description

【Technical field】 [0001] The invention relates to a thermal conductivity measuring device, in particular to a thermal conductivity measuring device with good heat insulation effect. 【Background technique】 [0002] In the process of developing functional materials, it is often necessary to measure the thermal conductivity of the thermally conductive material, especially for thermally conductive materials, such as thermally conductive adhesives, whose thermal conductivity affects the thermal conductivity of the final product. In the design process of heat sinks for electronic components, it is necessary to pre-calculate and simulate their thermal conductivity. Accurately measuring the thermal conductivity of heat-conducting materials can reduce the number of tests and development costs, so it becomes the key to development and design. [0003] At present, there are two main methods for measuring the thermal conductivity of materials: [0004] 1. Laser scintillation method. T...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 黄文正翁维襄黄全德
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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