Solid-solid phase transition rate measurement device and method for solid material

Abstract

The invention discloses a solid-solid phase transition rate measurement device and method for a solid material, which can measure weak phase transition rate under a small quantity of weak reactions and perform measurement and analysis on fast phase transition rate. The solid-solid phase transition rate measurement device disclosed by the invention comprises a vacuum heating chamber, wherein the vacuum heating chamber is connected with a gas source device, a sample heating table is arranged in the vacuum heating chamber, the sample heating table is connected with a heating temperature control mechanism, a glass window for enabling an infrared thermal imaging instrument to measure is formed at the top of the vacuum heating chamber, and the high-resolution and high-speed infrared thermal imaging instrument is arranged outside the glass window. By using the solid-solid phase transition rate measurement device and method disclosed by the invention, the change in phase transition rate in the whole transition process can be measured, and the real-time observation of the phase transition process can be realized.

Description

technical field [0001] The present invention relates to the measurement of phase change materials, in particular to a method for measuring solid-solid phase transition and phase transition rate using a high-resolution high-speed infrared thermal imager 122 to realize real-time observation of the phase transition process. Background technique [0002] The process of a substance changing from one phase to another is called a phase transition. In recent years, the application of phase change materials in the field of energy storage has become a research hotspot, but there is no national or international standard for the measurement of the phase change rate of phase change materials. Phase change rate is an important kinetic parameter of phase change materials, so its measurement is of great significance, especially when the speed of energy storage and release is required. For solid-solid phase change materials, the general testing methods are: laser ultrasonic measurement meth...

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Problems solved by technology

[0003] The measurement device provided by Japanese patent JPA2010223635 adopts laser ultrasonic measurement method, which is easy to damage the sample, resulting in large errors in test results, complex equipment structure, difficult technical implementation, measurement results are easily affected by the environment, and it is difficult to achieve accurate measurement

[0004] Literature: The hydrogen storage material phase change rate measurement device described in Chinese Journal of Nonferrous Metals 2003 (13) 3:695-698 uses the hydrogen volume measurement method, but this type of device obtains more information in the initial and final states As a result, it is not easy for real-time observation and observation of intermediate reaction rate changes, and large errors will occur for samples with a small amount of hydrogen absorption and desorption

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