The Invention Relates to a Preparation Method and a Process of Aluminum Diboride Powder

Background Technology

Aluminum diboride, also known as AlB2, has high theoretical combustion temperature, high melting point and excellent chemical stability. Additionally, it exhibits a high aluminum grain refining efficiency, making it an attractive choice in many areas. AlB2 can also be used to enhance the wear resistance and properties of alloys. It is also a solid propellant additive. AlB2 can be prepared in two methods. It is possible to either solid phase sinter aluminum powder and aluminum powder direct or through aluminum heat reaction aluminum powder and boronoxide or borofluoride. AlB2 powder made by either of these methods will have uneven size or shape which can cause a decrease in performance. AlB2 powder should be made with uniform particle sizes. It will ensure that it performs well and is easy to control.

Technical Implementation Elements

In this patent application, the technical problem is that an aluminum diboride (or AlB2) powder must be provided. This method can also control AlB2’s particle size and shape and provide a means to make sure it performs well. According to the invention, a process for making aluminum diboride is disclosed. It involves adding the precursor react raw materials to the liquid phase and obtaining the uniformly mixed suspension via ultrasonic mixer. Next, vacuum freeze-drying technology is used to remove the solvent to make the treatment material. Finally, the quartz tube with treated precursor reaction material and sealed is placed in a quartz tube. Aluminum diboride is prepared by baking the quartz tube in an oven.
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