A method for preparing nanometer-submicron elemental iron in simulated lunar soil/moondust

Abstract

The invention provides a method for preparing nano-submicron elemental iron in simulated lunar soil / moon dust, comprising the following steps: (1) loading simulated lunar soil CLRS-2 and graphite sheets into a crucible, and controlling simulated lunar soil The mass ratio of CLRS‑2 to the graphite sheet is (26~27):1; (2) the crucible is placed in a high-temperature atmosphere furnace, and argon gas is introduced after the high-temperature atmosphere furnace is evacuated; (3) the high-temperature atmosphere Heating the furnace to 1550-1600°C, and keeping it at this temperature for 3.5-4 hours; (4) Immediately after the heat preservation, put the reaction product in the crucible in water for quenching treatment, and then obtain the simulated iron containing nano-submicron sized elemental iron Lunar soil / moondust. The composition of the product prepared by the present invention is close to the real lunar soil / moon dust, and the particle size of the elemental iron in it is not more than 300nm, which is also close to the particle size of the elemental iron in the real moon soil / moon dust. It is safe, does not introduce impurities, can be mass-produced, and can better meet the needs of engineering experiments.

Description

A method for preparing nano-submicron elemental iron in simulated lunar soil / moon dust technical field The invention belongs to the field of celestial simulation materials, and relates to the preparation of nano-submicron level elemental iron in simulated lunar soil / moon dust. preparation method. Background technique Through the study of lunar samples returned by Apollo, it was found that vitreous is the main material composition of lunar soil [0002] One part, especially for lunar dust (lunar dust refers to the part of the lunar soil with a particle size < 20 microns), the content of cementitious glass is as high as ~80vol%. In this cementitious glass, there is a unique component - metallic iron, which is very important to the moon The physical and chemical properties of soil / moon dust have an important influence. Study shows stickiness, flotation, and biotoxicity of moon dust It is closely related to the composition of elemental iron. With the launch of a ne...

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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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