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A series of cubic phase Co3O4 nano-leaves were prepared via a combined approach of solution reaction and calcination. According to x-ray diffraction and electron microscopy, we find that the Co3 04 grain size increases with calcination temperature. This can induce many gaps in the products. M-T and M-H magnetization measurements reveal the typical antiferromagnetie behavior of nano-leaves. The effective moments of the samples prepared at 300, 400 and 500℃ are 5.6, 5.8 and 5.7μB per formula unit (FU), respectively, larger than the bulk value of 4.14 μB/FU. 相似文献
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硅酸盐因其基本结构单元[SiO4]四面体可通过共用顶点连接成各种结构形式,易形成具有大比表面积的多孔结构,且具有良好的热稳定性和化学稳定性,目前已广泛用于选择性催化、分子筛、气体的吸附与分离等领域.另外,硅酸盐还是一类优良的发光材料基质.如Mn^2 或其它稀土离子激活的Zn2SiO4、Mg2SiO4和CdSiO3等.由于原料来源广泛和价格低廉.硅酸盐的研究已引起人们的关注. 相似文献