Preparation method of nano-submicron elemental iron in simulated lunar soil/dust

Abstract

The invention provides a preparation method of nano-submicron elemental iron in simulated lunar soil / dust. The preparation method comprises the following steps: (1) putting the simulated lunar soil CLRS-2 and flake graphite into a crucible, and controlling the mass ratio of the simulated lunar soil CLRS-2 to the flake graphite to be (26-27) to 1; (2) placing the crucible in a high-temperature atmosphere furnace, vacuumizing the high-temperature atmosphere furnace, and then introducing argon; (3) heating the high-temperature atmosphere furnace to 1550-1600 DEG C, and performing heat preservation at the temperature for 3.5-4 hours; and (4) immediately placing a reaction product in the crucible into water for quenching treatment after the heat preservation is completed so as to obtain the simulated lunar soil / dust containing the nano-submicron elemental iron. The composition of the product prepared according to the invention is similar to that of real lunar soil / dust. The particle size of the elemental iron does not exceed 300 nm and is also similar to that of elemental iron in the real lunar soil / dust. Meanwhile, the preparation method is simple in process, safe in production process, free of introduction of impurities, capable of achieving batch production, and capable of better meeting the requirements of engineering tests.

Description

technical field [0001] The invention belongs to the field of celestial body simulation materials, and relates to a method for preparing nano-submicron elemental iron in simulated lunar soil / moon dust. Background technique [0002] Through the study of lunar samples returned by Apollo, it was found that vitreous is one of the main components of lunar soil, especially for lunar dust (moon dust refers to the part of lunar soil with a particle size of less than 20 microns), cementitious The content of glass is as high as -80 vol%. There is a unique component in this cementitious glass-metal iron element, which has an important influence on the physical and chemical properties of lunar soil / moon dust. Studies have shown that the adhesion, buoyancy and biological toxicity of moon dust are closely related to the composition of elemental iron. With the launch of a new round of lunar exploration projects, people urgently need to solve practical problems such as adhesion, wear, occl...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the complex process, low efficiency, high risk factor, easy mixing of impurities and large particle size of elemental iron in the existing method of preparing simulated lunar soil / moon dust, or the difference between the composition of the product and the actual lunar soil / moon dust However, the present invention provides a method for simulating the preparation of nanometer-submicron elemental iron in lunar soil / moon dust, so as to obtain metal iron with smaller particle size and a composition very close to that of lunar soil / moon dust Simulate lunar soil / moon dust, while avoiding the introduction of impurities in the preparation process, simplifying the preparation process, improving production efficiency and production process safety, so as to better meet the needs of engineering experiments

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