A kind of preparation method of yttrium oxide nanopowder and nanostructure

Abstract

The invention discloses yttrium oxide nano powder and a preparing method of a nano structure. A sonochemistry method in which natural asparagus gel is used as a surface active agent is adopted to prepare the yttrium oxide nano powder. Ultrasonic resonance bubbles are utilized to form nucleation, as the bubbles break, a common chemical bond can be destroyed, hydrophilic group surfaces of organisms in the asparagus gel can be attached to Y(OH)3 precipitation, and assist in crystallization of yttrium oxide during high temperature calcination and before organic groups are evaporated to be separated. In this way, by changing conditions of the ultrasound time, the ultrasound frequency, the PH value and the amount of the asparagus gel, and different chemical bonds are destroyed, which finally results in different shapes and microstructures. Different requirements of different industries for shapes and structures of the yttrium oxide nano powder are met, and a preparing method in which shapes are controllable, and the yttrium oxide nano powder of different nano structures can be prepared in the same method is provided.

Description

technical field [0001] The invention relates to a method for preparing yttrium oxide nanopowder, in particular to a preparation method capable of preparing yttrium oxide powder with different nanostructures. Background technique [0002] As an important rare earth compound, yttrium oxide has unique optical and physical and chemical properties, and is widely used in advanced ceramic materials, fluorescent materials, catalysis, lasers, material doping and other fields. Yttrium oxide is a white rare earth oxide insoluble in water and alkali, soluble in acid, its molar mass is 225.82g / mol, density 5.01g / cm 3 , melting point 2410 ° C, belongs to the cubic crystal system. [0003] The commonly used preparation method of yttrium oxide powder is ammonium bicarbonate precipitation method. Ammonium bicarbonate is an inexpensive precipitant. In this method, the inorganic salt solution of yttrium is directly reacted with hydrogen carbonate as an aqueous solution to obtain a slurry co...

AI Technical Summary

Problems solved by technology

This method provides an economical and environmentally friendly method suitable for large-scale production of spherical nano-yttrium oxide powder, and solves the problems of low dehydration efficiency of primary particles, difficulty in sintering and densification of aggregates, and low yield in conventional methods.

[0005] Although the above methods can produce yttrium oxide nanopowders with high efficiency and yield, they cannot effectively control the morphology and structure of yttrium oxide nanopowders, or they can only have a single morphology and structure.