Preparation method for nano-silicon nitride ceramic material compounded by erbium oxide and praseodymium oxide
A technology of silicon nitride ceramics and erbium oxide, applied in the field of ceramic materials, can solve the problems of unfavorable promotion of silicon nitride and high cost of iridium oxide, and achieve the effects of low cost, high density and industrialized production.
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[0021] The erbium oxide and praseodymium oxide are Ganzhou Jiarun New Material Co., Ltd., and the silicon nitride powder is M11 powder produced by German Starck Company. 3% of erbium oxide, 5% of praseodymium oxide and 92% of silicon nitride powder were respectively weighed according to weight percentage.
[0022] The above two powders were mixed uniformly in a planetary ball mill (QM-3SP2 type of Nanjing University Instrument Factory) at a speed of 300 rpm for 1.5 hours. The mixed powder was molded under a pressure of 80 MPa, and the green body was kept at 1450° C. for 16 hours in a vacuum carbon tube furnace (ZT-40-20 type from Shanghai Chenrong Electric Furnace Co., Ltd.).
[0023] The bulk density of the silicon nitride ceramics obtained in this embodiment is 3.41g / cm 3 , The flexural strength is 623Mpa.
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