制备工艺对合成ZrO_(2(f))/NiFe_2O_4复合材料的影响  

Effect of Preparation Technique on Synthesis of ZrO_(2(f))/NiFe_2O_4 Composites

作　　者：华中胜[1] 姚广春[1] 马俊飞[1] 张志刚[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第7期976-980,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金重点资助项目(50834001)

摘　　要：以NiO和Fe2O3为原料采用固相烧结法合成了NiFe2O4尖晶石,通过向其中添加二氧化锆纤维(ZrO2(f))制备了ZrO2(f)/NiFe2O4复合材料.研究了成型压力、烧结温度及烧结时间对复合材料气孔率和抗弯强度的影响,并利用热重分析仪、X射线衍射仪和扫描电子显微镜对复合材料进行了表征.结果表明:在160 MPa成型压力下,于1 300℃烧结6 h制备的ZrO2(f)/NiFe2O4复合材料气孔率较低,具有较高的抗弯强度;复合材料主要由四方相ZrO2和立方相NiFe2O4尖晶石组成;ZrO2(f)未与基体发生反应,避免了过强的界面结合力.NiFe2O4 spinel was synthesized via solid-state sintering technology using NiO and Fe2O3 as the raw materials,and ZrO2（f）/NiFe2O4 composites were prepared by adding ZrO2（f） fiber into NiFe2O4.The effects of molding pressure,sintering temperature and sintering time on the porosity and bending strength of ZrO2（f）/NiFe2O4 composites were investigated,and the composites were characterized by thermogravimetric analysis,X-ray diffraction and scanning electron microscopy.The results showed that the composites prepared under 160 MPa and sintered at 1 300 ℃ for 6 h possess low porosity and high bending strength,which are mainly composed of tetragonal ZrO2 and cubic NiFe2O4 spinel.There are no chemical reactions between ZrO2（f） and NiFe2O4,therefore,the excessively powerful interfacial binding strength is avoided.

关 键 词：ZrO2(f) NIFE2O4尖晶石 复合材料 气孔率 抗弯强度 

分 类 号：TF77[冶金工程—钢铁冶金]