【摘要】 以硅粉和氮化硅晶须为原料,通过添加30%(质量分数)成孔剂球形颗粒,以聚乙烯醇作粘结剂,采用干压成型工艺,反应烧结制备了多孔氮化硅陶瓷,分析对比了氮化硅晶须对反应烧结氮化硅多孔陶瓷介电性能的影响。实验结果表明,随着氮化硅晶须加入量的升高,氮化硅多孔陶瓷的介电常数和介电损耗都升高,介电性能恶化。更多还原

【Abstract】 The porous silicon nitride was prepared by reaction-bonded raw silicon powder and silicon nitride whiskers,adding 30wt% pore-forming agent and polyvinyl alcohol.The impacts of silicon nitride whiskers on the properties of reaction-bonded porous silicon nitride ceramics were particular studied.The results showed that the dielectric constant and dielectric loss were all raised with the increase of addition of silicon nitride whiskers.The silicon nitride whiskers deteriorate the dielectric properties of porous silicon nitride ceramics.更多还原