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A gas permeation characteristic parameter testing device and a method for measuring gas permeation characteristic parameters of micro-nano porous materials using it

A characteristic parameter, gas permeation technology, applied in suspension and porous material analysis, measurement device, permeability/surface area analysis, etc.

Active Publication Date: 2016-03-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the existing method for measuring gas permeation characteristic parameters of micro-nano porous materials due to the small permeation flow rate of micro-nano porous materials at room temperature and the limitation of measuring gas permeation characteristic parameters of micro-nano porous materials at high temperature, measurement difficulties and In view of the problem of large errors in measurement data, a gas permeation characteristic parameter testing device and a method for using it to measure gas permeation characteristic parameters of micro-nano porous materials are provided

Method used

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  • A gas permeation characteristic parameter testing device and a method for measuring gas permeation characteristic parameters of micro-nano porous materials using it
  • A gas permeation characteristic parameter testing device and a method for measuring gas permeation characteristic parameters of micro-nano porous materials using it
  • A gas permeation characteristic parameter testing device and a method for measuring gas permeation characteristic parameters of micro-nano porous materials using it

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specific Embodiment approach 1

[0038] Specific Embodiment 1: This embodiment is a gas permeability characteristic parameter testing device including a vacuum pump 1, a first valve 2, a second valve 3, a gas source 4, a third valve 5, a heater 6, and a first experimental cylinder 7 , a first pressure sensor 8, a cover plate 9, a first high temperature sealing gasket 10, a second high temperature sealing gasket 12, a sample platform 13, a second pressure sensor 14, a second experimental cylinder 15, a partition 16 and a tube 17;

[0039] Described vacuum pump 1 communicates with the second experiment cylinder body 15 through the first valve 2; Vacuum pump 1 communicates with the first experiment cylinder body 7 through the second valve 3; The first experiment cylinder body 7 and the second experiment cylinder body 15 are provided with Partition 16, partition 16 separates the first experimental cylinder 7 from the second experimental cylinder 15, the middle of the partition 16 is provided with a first circular ...

specific Embodiment approach 2

[0044] Embodiment 2: This embodiment differs from Embodiment 1 in that: the diameter of the first circular hole is 100 mm to 300 mm. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0045] Embodiment 3: The difference between this embodiment and Embodiment 1 or Embodiment 2 is that the diameter of the third circular hole is 30 mm to 100 mm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a gas permeability characteristic parameter test device and a method for measuring gas permeability characteristic parameters of a micro-nano porous material by utilizing the test device, in particular to a high-temperature gas permeability characteristic parameter test device and a method for measuring the high-temperature gas permeability characteristic parameters of a porous material by utilizing the test device, aiming at solving the problems of the existing method for measuring the gas permeability characteristic parameters of the micro-nano porous material that the gas permeability characteristic parameters are difficult to measure and the error of the measurement data is large because the permeation flow of the micro-nano porous material is small at the room temperature and the measurement of the gas permeability characteristic parameters of the micro-nano porous material is limited at the high temperature. The gas permeability characteristic parameter test device comprises a vacuum pump, a valve air source, a heater, an experiment cylinder, a pressure sensor, a cover plate, a sample platform, an isolation plate and a pipe barrel; the gas permeability characteristic parameters of the micro-nano porous material at the room temperature and high temperature are calculated according to the formulas (in the specification). The gas permeability characteristic parameter test device is applicable to the method for measuring the gas permeability characteristic parameters of the micro-nano porous material.

Description

technical field [0001] The invention relates to a method for measuring high-temperature gas permeability characteristic parameters of porous materials. Background technique [0002] Micro-nanoporous materials are widely used in many technical fields such as energy, chemical industry, and aerospace, such as heat insulation, thermal protection of high-speed aircraft, etc. The surface of the hypersonic vehicle is covered with micro-nano porous thermal insulation materials to protect the structure of the vehicle and the temperature inside the cabin within an appropriate range. During maneuvering flight, there will be a gas pressure difference on the surface of the micro-nano porous thermal insulation material. Since heat insulation materials usually have high porosity, the gas will permeate under the action of the gas pressure difference on both sides, which will affect the heat transfer characteristics of the micro-nano porous material and the heat insulation performance of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
Inventor 夏新林李东辉艾青周优均
Owner HARBIN INST OF TECH
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