Constant-pressure sealed type device for measuring oxygen exchange coefficient and oxygen diffusion coefficient

A technology of oxygen diffusion coefficient and oxygen exchange coefficient, which is used in measurement devices, instruments, scientific instruments, etc., can solve the problems of high cost and unsatisfactory data accuracy, and achieve stable test process, low test and analysis cost, and easy automation. Effect

Active Publication Date: 2015-07-22
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The existing analytical and testing devices for measuring oxygen exchange coefficient and oxygen diffusion coefficient are expensive and the data accuracy is not ideal

Method used

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  • Constant-pressure sealed type device for measuring oxygen exchange coefficient and oxygen diffusion coefficient
  • Constant-pressure sealed type device for measuring oxygen exchange coefficient and oxygen diffusion coefficient
  • Constant-pressure sealed type device for measuring oxygen exchange coefficient and oxygen diffusion coefficient

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Embodiment Construction

[0045] Preferred embodiments of the present invention are described in detail as follows:

[0046] In this example, see figure 2 , an isobaric sealed device for measuring oxygen exchange coefficient and oxygen diffusion coefficient, mainly includes an experimental platform device, a material conductivity testing device 8, an input and output device and a data analysis system, and samples of experimental materials to be tested are arranged on the experimental platform device , the test end of the material conductivity test device 8 is installed on the experimental platform device, the test end of the material conductivity test device 8 directly contacts the sample of the experimental material to be tested through a platinum wire, and the material conductivity test device 8 will test the obtained test material The conductivity signal of the experimental material sample is input to the data analysis system, and the data I / O interface of the data analysis system is connected to t...

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Abstract

The invention discloses a constant-pressure sealed type device for measuring the oxygen exchange coefficient and the oxygen diffusion coefficient. The device comprises an experimental platform device, a material conductivity test device, an input and output device, a data analysis system, a gas mixing device, an atmosphere pre-heating device and a gas detecting device, wherein the experimental platform device comprises constant-pressure cabins, a transmission device, experiment cavities and a sample table, a to-be-measured experimental material sample arranged on the sample table is switched in different experimental cavity atmospheres in the whole testing process, a gap between a sliding shaft and a sliding track is reduced by a sealing ring, and constant-pressure balance between the cavities is realized; the gas mixing device is used for providing different oxygen partial pressure test gases; the atmosphere pre-heating device is used for controlling the gas temperature; the data analysis system is used for performing signal data fitting computation to obtain the oxygen exchange coefficient and the oxygen diffusion coefficient. According to the constant-pressure sealed type device for measuring the oxygen exchange coefficient and the oxygen diffusion coefficient, signal data are collected by the test device, so that data of the oxygen exchange coefficient and the oxygen diffusion coefficient of the material are obtained accurately and rapidly, and the material performance data are obtained.

Description

technical field [0001] The invention relates to a material physical performance testing device, in particular to a material oxygen conductivity testing device, which is applied in the technical field of material physical and chemical performance analysis and testing. Background technique [0002] In the process of studying the oxygen conduction process of the material system, the surface oxygen exchange coefficient (k) and bulk diffusion coefficient (D) are usually used to characterize the change of oxygen flow rate to characterize the corresponding two important processes - surface adsorption and bulk diffusion. To date, two methods of measurement are generally used to obtain these two parameters. One is the isotope exchange depth curve method (IEDP), using 18 The diffusion curve of O isotope in the sample is fitted to obtain two parameters. Another method is the electrical conductivity relaxation method (ECR), which changes the oxygen partial pressure in the surrounding ...

Claims

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Application Information

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IPC IPC(8): G01N13/00
Inventor 甄强谭威李榕
Owner SHANGHAI UNIV
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