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Device for measuring heat conductivity coefficient of powder on basis of transient plane heat source method

A transient plane, heat source method technology, applied in the direction of material thermal development, can solve the problem of long thermal conductivity of powder thermal insulation materials

Pending Publication Date: 2017-05-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the steady-state method takes too long to measure the thermal conductivity of powder thermal insulation materials, the present invention provides a powder thermal conductivity measurement device based on the transient plane heat source method, which can quickly measure the thermal conductivity of powder thermal insulation materials at a certain temperature and a certain vacuum. thermal conductivity at

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  • Device for measuring heat conductivity coefficient of powder on basis of transient plane heat source method
  • Device for measuring heat conductivity coefficient of powder on basis of transient plane heat source method
  • Device for measuring heat conductivity coefficient of powder on basis of transient plane heat source method

Examples

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Embodiment 1

[0051] A device for measuring powder thermal conductivity based on a transient plane heat source method, the device comprising: a vacuum container 7 and a constant temperature system 11; the vacuum container 7 is set in the constant temperature system 11;

[0052] The constant temperature system 11 is an oven (RT-200°C), water bath system (0°C-100°C), oil bath system (100°C-200°C) or other low temperature system (minimum to 30K) (such as: liquid nitrogen (77K ), liquid nitrogen cryogenic box (77K-RT), etc.); the measurable temperature range of this transient plane heat source method thermal conductivity testing device is 30K-473K, and the constant temperature system 11 provides a certain ambient temperature for the sample to be tested;

[0053] Two PT100 platinum resistance thermometers are set in the constant temperature system 11 to monitor constant temperature inside the constant temperature system 11;

[0054] The vacuum container 7 includes a vacuum container cylinder bod...

Embodiment 2

[0085]A device for measuring powder thermal conductivity based on the transient plane heat source method, as described in Example 1.

[0086] To measure the thermal conductivity of the powder at 100°C and 10Pa, the steps are as follows:

[0087] 1) Install Hot Disk thermal constant analysis software in the computer;

[0088] 2) Installation of the sample to be tested: first fill the sample area 4 to be tested in the lower half 14 of the powder sample rack with powder samples, place the test probe 1, connect the upper half 13 of the powder sample rack and the lower half 14 of the powder sample rack Fix (clamp the test probe with the upper half 13 and the lower half 14 of the powder sample rack); the sample area 4 to be tested in the upper half 13 of the powder sample rack is filled with powder samples; the inner surface of the upper cover 12 of the powder sample rack Glue the 1000-mesh stainless steel mesh, connect and fix the upper half 13 of the powder sample rack with the u...

Embodiment 3

[0097] A device for measuring powder thermal conductivity based on the transient plane heat source method, as described in Example 1.

[0098] Measuring powder at 77K, 10 -3 The thermal conductivity under Pa, the steps are as follows:

[0099] 1) Install Hot Disk thermal constant analysis software in the computer;

[0100] 2) Installation of the sample to be tested: first fill the sample area 4 to be tested in the lower half 14 of the powder sample rack with powder samples, place the test probe 1, connect the upper half 13 of the powder sample rack and the lower half 14 of the powder sample rack Fix (clamp the test probe with the upper half 13 of the powder sample holder and the lower half 14 of the powder sample holder); the sample area 4 to be tested in the upper half 13 of the powder sample holder is filled with powder samples; cover 12 on the powder sample holder The inner surface of the 1000-mesh stainless steel mesh is glued, and the upper half 13 of the powder sample ...

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Abstract

The invention discloses a device for measuring the heat conductivity coefficient of powder on the basis of a transient plane heat source method. The device comprises a vacuum container and a constant temperature system, wherein the vacuum container is arranged in the constant temperature system and comprises a vacuum container drum body, a vacuum container upper flange and a vacuumizing pipe; and the vacuum container drum body internally comprises a powder sample rack, a testing probe, a PT100 platinum resistance thermometer and a fixed ring. Compared with the traditional method for measuring the heat conductivity coefficient of the powder, the device disclosed by the invention has the advantages that the heat conductivity coefficient of a powdery insulating material can be rapidly obtained; and the heat conductivity coefficient of the powdery insulating material at certain temperature and vacuum degree can be measured, the testing temperature ranges from 30K to 473K, and the vacuum degree ranges from 10<-3>Pa to 1atm.

Description

technical field [0001] The invention belongs to the technical field of thermal physical property testing of solid powder, and in particular relates to a device for measuring powder thermal conductivity based on a transient plane heat source method. Background technique [0002] Powder thermal insulation materials mainly include expanded perlite, airgel and hollow glass microspheres, etc., which have the advantages of low density, low thermal conductivity, high chemical stability, and good flame retardancy, and are an important class of thermal insulation materials. If the powder thermal insulation material is placed in a vacuum environment, its thermal insulation performance can be increased by ten times, which has great application value. Thermal conductivity is an important thermophysical parameter of thermal insulation materials. Therefore, measuring the thermal conductivity of powder thermal insulation materials at a certain temperature and a certain degree of vacuum is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 严开祺王平张敬杰
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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