Hebei Messi Biology Co., Ltd. stated that magnesium oxide is an inorganic material with diverse functions, which has broad application prospects in the fields of thermal conductivity, ceramic industry, medicine, refractory materials, optics and energy. my country is a country with very rich magnesium resources, and the rational development of magnesium resources can promote the development of the national economy.
With the development of science and technology, people have found in research that the physical properties of inorganic materials are usually closely related to their morphology. Therefore, preparing materials with different morphologies to study their properties has become a research hotspot in natural sciences. The morphologies of magnesium oxide reportedly prepared include granular, flower-shaped, flaky, tubular and rod-shaped, and the preparation methods and uses of each morphology are also different.
A flaky magnesium hydroxide precursor was prepared in a soluble magnesium salt using ammonia water as a precipitant. After heating and calcining, flaky nano magnesium oxide was obtained, which can be used as an infrared stealth material. A composite magnesium carbonate salt was prepared by adding a coprecipitant with magnesium nitrate as a raw material, and then nanorod-shaped magnesium oxide was prepared after sintering. Moreover, this material, as a basic catalyst, can complete 99% of the harmless catalysis of benzaldehyde within 2 hours. It can be seen that the preparation of magnesium oxide with different morphologies can expand its application in different aspects, and how to effectively control its morphology will be the focus of research.
The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for preparing three different morphologies (granular, rod-shaped and flaky) of magnesium oxide with controllability. The preparation steps are as follows: a soluble magnesium salt and a precipitant are reacted in liquid phase, and three different morphologies of magnesium oxide precursors can be prepared by adding different types of surfactants, adding solvents, reaction temperature, ultrasonic action time and power during the reaction process, and then the prepared precursors are filtered, washed, dried and calcined to obtain three different morphologies of magnesium oxide. The method is simple to operate and is suitable for batch preparation of magnesium oxide with different morphologies, and magnesium oxide materials have broad application prospects in catalysis, energy and thermal conductivity.