Method of preparing magnesium-niobate

Abstract

The invention discloses a method for preparing magnesium niobium oxide, which comprises the following steps: magnesium oxide (MgO) is mixed with niobium pentaoxide (Nb2O5) according to the dose of the mole ratio of 1:1, and the mixture is arranged inside a screw grinding machine to be ground for 6 to 11 hours; or after the magnesium oxide (MgO) is mixed with niobium pentaoxide (Nb2O5) at the same proportional ratio, the mixture is added with de-ionized water that can dip the mixture, and after the mixed solution is ground and uniformly mixed in a mortar, and the mixture is arranged into an oven to be dried until the mixture is slightly dry in the temperature of 80 to 100 DEG C; the slight dried mixture is ground in the screw grinding machine for 5 to 8 hours to get the magnesium niobium oxide with the ordinary chemical formula of MgNb2O6. The prepared magnesium niobium oxide can be reacted with lead monoxide to synthesize the magnesium niobium oxide lead iron electrical material, thus can greatly shorten the reaction time of the synthesis, and also can effectively prevent the volatilization of the lead composition in the reaction process, and can realize the pollution-free chemical reaction. The invention has the advantages of simple craftwork, easy operation, short preparation time, pure material phase, good dispersion, uniform particles, and the like.

Description

technical field [0001] The invention relates to the preparation of ferroelectric materials, in particular to a preparation technology of magnesium niobate. Background technique [0002] Magnesium niobate (MN) is the precursor in the porcelain powder of lead magnesium niobate base MLCC, in the prior art, it is passed niobium pentoxide (Nb 2 o 5 ) and basic magnesium carbonate high temperature solid state reaction synthesis. Not only the reaction temperature is high (~1050°C), the energy consumption is high, the process is cumbersome, and the production cost is high; and the product quality is often affected by raw materials (such as Nb 2 o 5 ) purity, particle size, so that the reaction is not complete, leading to the generation of pyrochlore phase in the next step of synthesis, and ultimately lead to the instability of the performance of the element. [0003] The mechanochemical method uses mechanical energy to activate raw materials, resulting in changes in the structur...

AI Technical Summary

Problems solved by technology

However, the traditional high-energy ball milling mechanochemical method, based on the design of crushing theory, seems powerless in the synthesis of new inorganic non-metallic materials. Synthesizing an inorganic non-metallic solid material often requires tens of hours of ball milling, and the obtained is still an amorphous phase, and An additional annealing process is required to obtain the desired phase

Due to the limitations and imperfections of the traditional pulverization theory, the synthesis process has low efficiency, high energy consumption, and low yield.

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