Sealed crucible with pressure relief function and preparation method thereof

Abstract

The invention relates to a sealed crucible with a pressure relief function and a preparation method thereof. The sealed crucible comprises a pot body and a pot cover, an air channel used for pressure relief is formed in the pot cover, the pot cover is provided with a pressure relief part capable of deforming under pressure, and when the pot cover is in an initial state, the air channel is sealed on the pot cover by the pressure relief part; and when the pot cover is pressed, the pressure relief part deforms to open the air channel for pressure relief. According to the sealed crucible with the pressure relief function, the air channel sealed by the pressure relief part is formed in the crucible cover, when the crucible is used for testing, after the pressure in the crucible is increased, the pressure relief part is deformed, then the air channel is promoted to be opened for pressure relief, the thermal runaway process can be better simulated, and the repeatability of a test result is improved; by adopting the crucible disclosed by the invention, a new thermal analysis method can be expanded, and the influence of pressure on the thermal performance of a substance can be investigated.

Description

technical field [0001] The invention relates to the technical field related to crucibles, in particular to a sealed crucible with a pressure relief function and a preparation method thereof. Background technique [0002] Thermal analysis is an analytical technique that measures the relationship between the physical or chemical properties of a substance and temperature, and is widely used in the fields of materials, pharmaceuticals, food, energy, and the environment. As a core component of thermal analysis technology, the crucible not only acts as a reaction vessel, but also affects the reaction process. For example, as the gas production reaction proceeds, the pressure in the non-sealed crucible remains stable, while the pressure in the sealed crucible increases continuously, and the back-mixing process is strong, resulting in different reaction balances and different heat production results in the two crucibles. In addition, for volatile liquid samples, there is also a com...

AI Technical Summary

Problems solved by technology

However, the existing commercially available thermal analysis crucibles, such as the ordinary / high-pressure sealed crucibles of TA in the United States and NETZSCH in Germany, have no pressure relief function, resulting in continuous accumulation of pressure during thermal analysis, and it is impossible to simulate pressure relief and subsequent processes

When the gas generation is severe, ordinary sealed crucibles will also randomly leak at the fastening place, seriously affecting the repeatability of test results

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