Gallic acid bismuth zirconium double metal salt, preparation method and application thereof

Abstract

The invention discloses a gallic acid bismuth zirconium double metal salt comprising Bi2Zr(C7O6H3)2, wherein the C706H3 is gallic acid negative ions. The preparation method of the double metal salt comprises the following steps: (1) reacting gallic acid and bismuth metal salt to obtain gallic acid bismuth; (2) adding an alkali solution into the gallic acid bismuth, and filtering the mixture; and (3) dissolving soluble zirconium salt into water, and adding the filtrate obtained in the step (2) into the mixture to obtain the gallic acid bismuth zirconium double metal salt. The gallic acid bismuth zirconium double metal salt can be used as a combustion catalyst of a solid propellant, an unstable combustion inhibitor and a difunctional ballistic modifier.

Description

technical field [0001] The invention relates to a bismuth-zirconium gallate double metal salt and a preparation method thereof. The double metal salt can be used as a combustion catalyst of a solid propellant, an inhibitor of unstable combustion and a dual-function ballistic improver. technical background [0002] Solid propellants are the energy source of solid rocket motors, and have been widely used in strategic and tactical weapons and aerospace technology. The range and flight speed of a rocket depend first on the total energy level of the propellant charge, but are closely related to the energy release rate and efficiency of the propellant charge. The combustion process as a means of propellant energy release can be divided into steady-state combustion and unstable combustion. Therefore, the performance adjustment of steady-state combustion and the suppression of unstable combustion have long been one of the important research topics for propellant developers. one. ...

AI Technical Summary

Problems solved by technology

[0003] Lead compounds are the most important catalysts for the practical application of double-base propellants today, but lead compounds are highly toxic, and the lead oxide produced by combustion and decomposition is white or light blue smoke in the engine exhaust, which is not conducive to the guidance of missiles and stealth, for which researchers have long carried out research on non-lead catalysts

[0004] In addition, the most used unstable combustion inhibitors in China are Al powder and Al powder 2 o 3 , although the addition of Al powder solves the problems of low propellant energy, high-frequency oscillation and unstable combustion, but the aluminum powder participates in the combustion reaction when the propellant burns, which adversely affects the ballistic performance of the engine. The tail produces a very thick plume, which is inconsistent with the low signature of the propellant required by modern weapons

And Al 2 o 3 Due to its low melting point, it is easy to condense with catalysts such as PbO and CuO to form large particles during combustion, which not only affects the catalytic efficiency of the catalyst, but also affects the inhibition efficiency of unstable combustion.

Images