In this project, high density silicon nitride ceramics were prepared by atmosphere pressure sintering and hot isostatic pressing. The high-strength near net size ceramic body was prepared by cold isostatic pressing, and the high-performance silicon nitride ceramic was prepared by atmosphere pressure sintering and hot isostatic pressing. With the advantages of high density, high precision, excellent thermal shock resistance and high thermal conductivity, it is widely used in the field of high temperature structural ceramics and high seismic structural ceramics.<br>
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