Device for testing air permeability of graphite material

A graphite material and testing device technology, which is applied in measuring devices, analytical materials, suspensions and porous material analysis, etc., can solve the problems that the influence relationship cannot be clarified, and achieve the effects of good sealing, high precision and simplified structure

Active Publication Date: 2020-06-26
山东伟基炭科技有限公司
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Problems solved by technology

[0004] In the field of single crystal silicon and silicon carbide production, the gas permeability of the crucible of graphite material is a key parameter for crystal growth, but due to the limiting factors of gas permeability measurement of graphite material, its influence relationship has not been clarified so far

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  • Device for testing air permeability of graphite material
  • Device for testing air permeability of graphite material
  • Device for testing air permeability of graphite material

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] In describing the present invention, it is to be understood that the terms "central", "axial", "radial", "longitudinal", "transverse", "length", "width", "upper", "lower" , "front", "back", "left", "right", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. Based on the orientation or positional relationship s...

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Abstract

The invention provides a device for testing the air permeability of a graphite material. The device comprises an air storage tank, a pressure stabilizing tank, a pressure reducing filter, a flow meter, a testing tank, a tee joint, an exhaust pipe and a differential pressure gauge, the testing tank comprises a lower pipe, an upper pipe, a lower annular rubber pad, a radial sealing ring, an upper annular rubber pad, a graphite material sample and a sealing ring; the pressure difference exists between the two sides of the sample in the thickness direction; gas passing through a sample, the differential pressure of the two sides of the sample in the thickness direction is displayed by the differential pressure gauge, the pressure and the flow of gas flowing through the sample are displayed bythe flow meter, and then the air permeability of the graphite material is calculated according to a differential pressure method, so that the air permeability of the graphite material with high density and very small air permeability is detected, and the precision and the accuracy are relatively high.

Description

technical field [0001] The invention belongs to the technical field of graphite material detection, in particular to a testing device for the air permeability of graphite material. Background technique [0002] Carbon materials are mainly divided into carbon materials and graphite materials (solid materials whose main component is graphitic carbon). Although GB / T9973-2006 carbon material air permeability test method specifies the air permeability test method of carbon materials, this method is for reference. The air permeability test method of insulation materials has been established, and due to the extensive use of rotameters, water column differential pressure gauges and pressure gauges, the measurement devices themselves are not accurate, so the operation is complicated and the readings are prone to errors, so this method is limited to some domestic medium and rough. The test of materials with high air permeability such as graphite, the air permeability is 10-350cm 2 / s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 薛雁凯刘添华董延平姜明理
Owner 山东伟基炭科技有限公司
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