Preparation method of machinable aluminum nitride ceramic: Fid-Bau Portal

Preparation method of machinable aluminum nitride ceramic

XU WANGJIE

The invention discloses a preparation method of machinable aluminum nitride ceramic, which comprises the following steps: carrying out ball milling on an aluminum material raw material, sieving, mixing with an adhesive, granulating, carrying out dry pressing molding, degreasing, carrying out hot pressing sintering to obtain an aluminum nitride base material, carrying out pore-forming treatment on the aluminum nitride base material, dipping in a boron-containing aqueous solution, and carrying out high-temperature heat preservation to obtain the machinable aluminum nitride ceramic. The machinable aluminum nitride ceramic disclosed by the invention is obtained. Compared with the prior art, the machinable aluminum nitride ceramic prepared by the preparation method disclosed by the invention has the advantages that the heat conductivity coefficient is effectively enhanced, the form stability is improved, and the machinable aluminum nitride ceramic has good formability and heat stability. In addition, the dielectric property is also optimized.

本发明公开了一种可加工氮化铝陶瓷的制备方法，通过将铝材原料球磨、过筛，与粘合剂混合，造粒，再干压成型，脱脂处理，再热压烧结，得到氮化铝基材，将氮化铝基材进行造孔处理，然后置于含硼水溶液中浸渍，高温保温，得到本发明的可加工氮化铝陶瓷。与现有技术相比，本发明制备的可加工氮化铝陶瓷有效地增强了导热系数，提高了形态稳定性，并具有良好的成型性能和热稳定性。此外，还优化了介电性能。

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