Preparation method of composite oxide

Abstract

The invention discloses a preparation method of a composite oxide. In the method, one or more of ammonium salt, magnesium salt, calcium salt, strontium salt, aluminum salt, lead salt, titanium salt, chromium salt, manganese salt, ferric salt, cobalt salt, nickel salt, copper salt, zinc salt, zirconium salt, silver salt, lanthanum salt and cerium salt are dissolved in water to form a solution A; and one or more of ammonia water, ammonium carbonate, sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, sodium silicate and sodium aluminate are dissolved in water to form a solution B. The solution A and the solution B are quickly mixed, stirred and ground after being cooled, and water is solidified quickly in the process of generating sediments so as to form a powder with ice and the sediments highly dispersed. The powder is aged, washed, dried and baked to obtain target material. In the preparation process, liquid-solid phase transformation is quick so as to ensure high dispersion of different components, and the synthetic material has the advantages of high specific surface, low bulk density, high catalytic performance and the like. The method has the characteristics of simple operation and low cost, and is generally suitable for synthesizing a variety of composite oxides.

Description

technical field

[0001] The invention relates to a preparation method of a composite oxide. Background technique

[0002] Composite oxides with specific structures and compositions play a very important role in the fields of catalysis, materials, and energy. Composite oxides, due to the synergy between multiple components or the formation of a specific structure, often have properties that single-component oxides do not have in various physical and chemical properties. For example, MgAl 2 o 4 Spinel materials have unique mechanical and physical and chemical properties, and can be widely used as refractory materials, ceramic insulating materials, catalyst carriers, etc. ABOs 3 Type perovskite compounds have outstanding optical, electrical, magnetic, and catalytic properties. And Ce x Zr 1-x o 2 The material has a good ability to store and release oxygen, and has a good application prospect in the purification of automobile exhaust.

[0003] The existing preparation me...