【作者】 王红洁； 余娟丽； 张健； 张大海； 浑丙利； 严友兰； 乔冠军；

【Author】 WANG Hongjie~1 YU Juanli~1 ZhANG Jian~2 ZhANG Dahai~2 YAN Youlan~1,HUN Bingli~1,QIAO Guanjun~2 1(State Key Laboratory for Mechanical Behavior of Materials,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049) 2(National Key Defense Laboratory of Advanced Functional Composite Materials Technology, Aerospace Research Institute of Materials & Processing Technology,Beijing 100076)

【机构】 西安交通大学金属材料强度国家重点实验室； 航天材料及工艺研究所先进功能复合材料技术国防科技重点实验室；

【摘要】 本文以氮化硅为原料,添加不同烧结助剂,利用液相烧结,制备高性能多孔氮化硅透波材料。通过对材料的密度、孔隙率、强度和介电性能测试,及显微组织观察,系统分析了烧结助剂对材料性能和组织的影响。结果表明,在相同烧结工艺条件下,与添加Y₂O₃-Al₂O₃复合烧结助剂的氮化硅多孔陶瓷相比,单纯添加Y₂O₃烧结助剂的氮化硅多孔陶瓷具有较高的气孔率、较低的介电常数和介电损耗。更多还原

【Abstract】 In this paper,the high performance porous wave- transparent Si₃N₄ ceramics was prepared by using presureless sintering,used Y2O3 and Al2O3 as sintering rids.The influence of sintering aids on the properties of wave-transparent porous Si3N4 ceramics were investigated also.The results show that at the same sintering condition,the samples,which contain the only Y2O3 sintering aids,has the higher proposity,lower dielectric constant and the dielectric loss.更多还原