A method for obtaining and encapsulating nano-metal iron

Abstract

The invention discloses a method for obtaining nano-metallic iron and its encapsulation. The method is a laboratory simulation method for preparing nano-metallic iron in lunar soil. Nano-iron is obtained by bombarding an iron target, and nano-iron is obtained by bombarding a basalt target. Floccules; the iron pellets deposited by laser bombardment mainly exist in the form of zero-valent iron, and are polycrystalline; by adjusting the pulse laser bombardment frequency and bombardment time and other parameters to control the size and content of nano-iron, the lunar soil can be simulated in batches The nano-iron-wrapped structure is used to simulate more realistic lunar soil and moondust samples.

Description

technical field [0001] The invention relates to the field of geochemistry, in particular to a method for obtaining and encapsulating nanometer metal iron in simulated lunar soil. Background technique [0002] Unlike the earth, the moon has no protection from the atmosphere and magnetic field, and has suffered from space weathering for a long time. Nano metallic iron (npFe 0 ) was found to be widely present in the cementitious glass phase of lunar regolith and in the amorphous ring on the surface of lunar regolith particles in the form of round globules. Its formation is considered to be related to space weathering. Through the study of Apollo lunar samples, nano-metallic iron is the most important factor that changes the reflectance spectrum of the lunar surface. [0003] Through the experimental simulation research on nano-metallic iron, it can provide a strong theoretical basis for the explanation of its formation and the interpretation of the remote sensing data of the ...

AI Technical Summary

Problems solved by technology

[0004] At present, a series of experiments have been carried out at home and abroad to simulate the nano-metallic iron in the lunar soil. In order to simulate the smelting reduction effect of (micro) meteorite bombardment, olivine, pyroxene, plagioclase and basalt glass were heated to 1100 °C in a hydrogen atmosphere. ℃, and cooled rapidly, this method has obtained submicron or even a few micron metallic iron, but it is far beyond the particle size range of nano-metallic iron in lunar soil; using pulsed laser radiation to simulate olivine and pyroxene to simulate (micro) meteorites Bombardment evaporation deposition, it was observed that the surface of olivine particles was amorphized and wrapped with nano-metal iron, but this structure was not found in pyroxene, and the content of nano-metal iron was low, and the repeatability of the experimental results was poor; Melts of different shapes were also observed in plagioclase with low iron content; to simulate the sputtering deposition of solar wind particles, high-energy H and He ions were mainly implanted into olivine and pyroxene with an ion implanter. Crystal thin layer and bubble structure, but no nano-metallic iron was observed

There are also some non-causal simulation methods, such as chemical synthesis sol-gel method, microwave melting method, magnetron sputtering method, and two-step heat treatment method, etc., but these methods cannot simulate in batches close to the real lunar soil spherical spherical nanometer iron

Images