Structure, electric properties and positron annihilation studies of CuZnFe2O4 doped with BaTiO3
Structure, electric properties and positron annihilation studies of CuZnFe2O4 doped with BaTiO3
复制标题
BaTiO3掺杂CuZnFe2O4的结构、电性能及正电子湮灭研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
T. Sharshar
中科院分区：
文献类型：
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作者：
O. Hemeda;K. R. Mahmoud;T. Sharshar
摘要：采用高能球磨技术制备了尖晶石CuZnFe2O4铁氧体(CZF)和钛酸钡BaTiO3(BT)复合材料。复合体系的 X 射线衍射 (XRD) 图案证实了复合材料制备具有两种压磁相和压电相。扫描电子显微镜 (SEM) 测量结果显示，微观结构几乎均匀，BT 晶粒分散良好，并且存在一些孔隙。正电子湮灭寿命（PAL）用于探测 BT-CZF 复合材料的缺陷和结构变化。 PAL参数（$au_{1}^{}$、I1、$au_{2}^{}$、I2和平均寿命）表明掺杂BT含量影响空位型缺陷的尺寸和浓度。
Abstract.Composite materials of spinel CuZnFe2O4 ferrite (CZF) and barium titanate BaTiO3 (BT) were prepared by using the high-energy ball milling technique. The X-ray diffraction (XRD) patterns of the composite system confirmed the composite preparation with two piezomagnetic and piezoelectric phases. The results of scanning electron microscope (SEM) measurements show a nearly homogeneous microstructure with good dispersion of BT grains as well as the presence of some pores. The positron annihilation lifetime (PAL) is used to probe the defects and structural changes of the BT-CZF composites. The PAL parameters ($ au_{1}^{}$ , I1, $ au_{2}^{}$ , I2 and mean lifetime) show that the doped BT content affects the size and concentration of the vacant type defects.