Method for synthetizing synthetic metal boride nano-powder by iodine assisting magnesium co-reduction solid-phase reaction

Abstract

The invention relates to a method for synthetizing synthetic metal boride nano-powder by iodine assisting magnesium co-reduction solid-phase reaction, which utilizes the iodine assisting magnesium co-reduction solid-phase reaction to synthetize alkaline earth, rare earth metal six-boron compound and transition metal boride as well as ternary rare earth six-boron compound, is a common and universal method, and can prepare and obtain YB6, ScB6, CeB6, PrB6, PrB6, NdB6, SmB6, EuB6, CaB6, SrB6, BaB6 and the like, ternary rare earth six-boron compound and transition metal boride.

Description

technical field [0001] The invention relates to a method for synthesizing metal borides by solid phase reaction, in particular to a method for synthesizing metal boride nanometer powder materials at relatively low temperature by using solid phase reaction of iodine-assisted magnesium co-reduction in a reactor. Background technique [0002] Boron compounds of transition metals and hexaboron compounds of alkaline earth and rare earth metals have high hardness, high melting and boiling points, and good thermal and chemical stability. Rare earth and alkaline earth metal hexaboron compounds have low work functions and are generally good field emission materials. Niobium boride and yttrium hexaboride are superconductors. Due to the above-mentioned excellent properties of boron compounds, the synthesis of borides has aroused the interest of scientists. So far, a variety of synthetic routes have been developed, such as direct synthesis of elements at 1800°C (J.Cryst.Growth 11(1971...

AI Technical Summary

Problems solved by technology

For the preparation of ternary or multi-component borides, it is generally obtained by means of carbothermal, borothermal and thermite at high temperatures above 1000°C. Huo Dexuan and others can obtain multi-component metal hexaborides by using sodium borohydride and chloride, see CN200610053497.9 , as mentioned earlier, this method has high pressure and relatively high temperature. In practical application, the requirements for equipment are high, which is not conducive to large-scale production operations.

In addition, there are very few current reports on the preparation of multinary metal borides at milder temperatures.

And generally there are problems such as high cost of raw materials and difficulty in industrialization

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