多晶CaB_6陶瓷弱铁磁性能与气孔率关系  

Relationship of Ferromagnetic Property with Porosity of Polycrystalline CaB_6 Ceramics

作　　者：曹明贺[1] 孙越魁[2] 蒋军[2] 刘韩星[1] 袁俊[2] 

机构地区：[1]武汉理工大学材料复合新技术国家实验室,武汉430070 [2]清华大学材料科学与工程系,北京100084

出　　处：《无机材料学报》2006年第3期640-644,共5页Journal of Inorganic Materials

摘　　要：用常压烧结和热压烧结法分别制备了多晶Ca1+xB6(x=-0．02、0、0．02)陶瓷样品并对其铁磁性能进行系统分析．结果表明,在烧结温度低于1500℃范围内,不论样品富Ca或赤 Ca,所有的样品均呈现铁磁性能;另外,两种方法制备的陶瓷样品虽然气孔率明显不同,而其铁磁性能并没有显著差异,认为CaB6样品存在的铁磁性机制不决定于样品中的Ca空位浓度和气孔率．Polycrystalline Ca1＋xB6（x= -0.02, 0, 0.02） ceramics were prepared by hot press and normal methods respectively and their ferromagnetic properties were analyzed systematically. The results indicate that all the samples prepared are ferromagnetic when sintering temperature is less than 1500℃. Though the porosity ratio of these samples prepared by these two methods is significant difference, the ferromagnetic properties are not changed with the changing porosity. We believe the ferromagnetism in the CaB6 ceramics is not concerned with the Ca vacancies or the porosity in the samples.

关 键 词：多晶CaB6陶瓷 铁磁性能 气孔率 热压烧结 

分 类 号：TQ174[化学工程—陶瓷工业]