Oxidation Behaviour of Si3N4 Materials in Air and Nitrogen Atmosphere  

作　　者：ZHANGQitu LINGZhida 

机构地区：[1]DepartmentofMaterialsScienceandEngineering,NanjingUniversityofChemicalTechnology,Nanjing,210009,China

出　　处：《China's Refractories》1999年第4期3-7,共5页中国耐火材料（英文版）

摘　　要：Si3N4 powder and hot-pressed Si3N4 ceramics added with Al2O3 are used for investigate their oxidation behvior in air and nitrogen atmosphere(with oxygen partial pressure PO2=1-10Pa),The oxidation products of Si3N4 are examined by chemical analysi,X-ray diffraction (XRD) and XPS method,Also, thermodynamic calculation is made to analyze oxidation behavior of Si3N4.The results show that only passive oxidation will occur when Si3N4 is oxidized in air at high temperature,whereas in N2 at high temperature,the active oxidation is dominant in spite of the existence of a little passive oxidation.

关 键 词：氧化反应 四氮化三硅 陶瓷工业 制陶术 空气 氮气 原料 

分 类 号：TQ174.42[化学工程—陶瓷工业]