BN-Si2N2O composite ceramic and preparation method thereof

• Main Authors: YANG ZHIHUA, DUAN XIAOMING, TIAN ZHUO, YE SHUQUN, JIA DECHANG, ZHOU YU, ZHANG PEIFENG
• Format: Patent
• Language: Chinese; English
• Published: 19.11.2014
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention discloses a BN-Si2N2O composite ceramic and a preparation method thereof, relates to a boron nitride based ceramic material and a preparation method thereof, and aims to solve the problems that an existing method for preparing the boron nitride based composite material is high in preparation cost, low in efficiency and difficult in preparation of large-size boron nitride based ceramic components. The BN-Si2N2O composite ceramic is prepared from amorphous nano silicon dioxide, silicon nitride powder and hexagonal boron nitride powder. The preparation method comprises the following steps of: one, weighing; two, preparing slurry through ball milling; three, drying to prepare powder; four, prepressing and forming; five, performing isostatic cool pressing treatment; and six, performing sintering treatment to obtain the BN-Si2N2O composite ceramic. The preparation method has the advantages that the preparation cost is reduced, the efficiency is improved, and the difficulty for preparing the large-size