作　　者： (张磊）; (熊定康）; (资冬斌）; (谭小军）; (徐守磊）; (邓文）;

机构地区： 广西大学物理科学与工程技术学院,南宁530004

出　　处： 《功能材料》 2017年第9期9110-9115,共6页

摘　　要： 采用固相反应法以不同的烧结温度(950,1 000,1 050和1 100℃)制备了CuFeO_2(以下简称CFO)陶瓷样品,研究了烧结温度对CFO陶瓷的微结构、元素价态及反铁磁相的影响。XRD结果表明,陶瓷样品均为CFO主相结构。SEM测试显示,不同烧结温度下样品的微观形貌有很大差异,较高的烧结温度可促进晶粒长大,同时微孔洞的开空间也增大。XPS结果显示有变价的铜离子存在,而铁离子价态保持不变。磁性能测试表明,随着烧结温度的升高,CFO陶瓷样品反铁磁相的稳定性减弱。 The CuFeO2 （CFO） ceramics were prepared by using solid state reaction method at different sintering temperatures such as 950,1 000,1 050 and 1 100℃. The influence of sintering temperature on microstructure, element valence and antiferromagnetic phase of CuFeO2 ceramics has been investigated. The XRD results showed that a major CFO phase has been formed in all CFO ceramics. The SEM images indicated that the microstructure morphology is obviously affected by sintering temperatures. The grain size and open volume of the pores increases with the increasing sintering temperatures. The XPS spectra showed that the valence state in copper appears in the mixed state of Cu^＋ and Cu^＋2 , while the iron ion valence is unchanged. Magnetic measurements showed that the stability of antiferromagnetic phase of CFO ceramics decreases with the increase of sintering temperatures.

关 键 词： 多铁材料 烧结温度 离子价态 反铁磁相