The Catalytic Materials Used in Synthesis of Cubic Boron Nitride under High Pressure

The preparation of catalytic materials Mg3B2N4 and Ca3B2N4 used in synthesis of cubic boron nitride under high pressure and their stability and catalysis are discussed in this paper. The crystalline of the hBN and the synthesis temperature time process and circumstance have important influence on the quality and stability of the catalysts. With these catalysis, the cBN was synthesized under high pressure and high temperature. These catalysts are characterized as lower synthesis pressure, higher transformation radio, wider range of synthesis pressure and temperature, lower impurity content and higher strength.