低温固相法制备YMnO_3纳米晶粉体  

Preparation of YMnO_3 Nanocrystal Powders by Low-temperature Solid State Method

作　　者：杨承燕[1] 王玺堂[1] 马妍[1,2] 王周福[1] 刘浩[1] 秦梦黎[1] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,武汉430081 [2]中国地质大学(武汉)教育部纳米矿物材料及应用工程研究中心,武汉430074

出　　处：《人工晶体学报》2013年第11期2309-2314,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51202169);纳米矿物材料及应用教育部工程研究中心(中国地质大学)开放基金(CUGNGM201208)

摘　　要：以金属无机盐为原料，柠檬酸为络合剂，采用低温固相法制备前驱体，再经煅烧获得高纯度YMnO3纳米粉体。利用FTIR和TG／DSC对前驱体的组成及热分解过程进行分析，用XRD、FESEM、TEM测试手段分析了YMnO3的相组成和粒子形貌，并研究了该纳米粉体的磁学性能。结果表明：经800℃煅烧可获得高纯YMnO，纳米晶粉体，颗粒近似球形且尺寸分布均匀，约为20～30nm，其反铁磁转变温度为45K。经1500℃烧结3h后可获得致密的YMnO，陶瓷。YMnO3 precursor was synthesized by low-temperature solid state reaction using inorganic salts as starting materials, and the citric acid as complex former. High purity YMnO3 nano-powders were formed by calcining the precursor. The composition and the thermo-decomposing process of the precursor were studied by means of FTIR spectrum and TG/DSC analysis. The phase constitution and particle morphology of YMnO3 were characterized by XRD, FESEM and TEM. The magnetic properties of YMnO3 nano-powders were also studied. The results showed that high purity YMnO3 nanocrystal powders could be synthesized at 800℃. The prepared YMnO3 nano-powders were almost spherical with a uniform particle size of about 20-30 nm, and the antiferronmagnetic transition temperature is about 45 K. In addition, compact YMnO3 ceramics could be obtained after sintering at 1500 ℃ for 3 h.

关 键 词：YMnO 纳米晶 低温固相法 磁性能 

分 类 号：O469[理学—凝聚态物理]