Method for preparing nanometer borofluoride powder

Abstract

The invention relates to a preparation method for nano M(BF4)n powder, which comprises: dissolving excess dried BF3 into organic solvent to mix with dried anhydrous MFn powder by the ratio 1:1.1-1:2.5; putting into sealed stainless steel tank with diameter as mm phi5:phi1:phi0.2=1:3:5 for high-energy grinding 50-70h as the chemical reaction equation MFn+nBF3->M(BF4)n; then, removing the steel by magnetic field, absorbing and volatilizing excess BF3 solution and solvent, and obtaining the product with size 50-80nm. This invention is simple and convenient to control, and has low cost and no pollution.

Description

technical field [0001] The invention belongs to the field of powder metallurgy preparation, in particular to a nanometer fluoroborate M(BF 4 ) n Method of powder preparation. Background technique [0002] In the prior art, nanopowder refers to ultrafine particles with an average particle diameter below 100 nm. Due to its small size, small number of atoms in the particle, and many atoms distributed on the surface, its surface area effect, volume effect and small size effect make it have different properties from conventional bulk and micropowder materials. It has many new and extremely important application values ​​in the fields of aviation, aerospace, military industry, materials, metallurgy, chemical industry, medicine, etc., and is known as a brand-new new functional material. Nano fluoroborate powder is just this new functional material with brand-new functions. Conventional fluoroborate is a kind of important metallurgical and chemical industry raw materials, it can...

AI Technical Summary

Problems solved by technology

However, it is very difficult to directly grind fluoroborate to prepare nano-powder by high-energy ball milling. After a long time of grinding, on