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首页> 外文期刊>Physica, B. Condensed Matter >Effect of elevated concentrations of strontium and iron on the structural and dielectric characteristics of Ba _((1-x-y))Sr _((x))Ti Fe _((y))O _3 prepared through sol-gel technique (Conference Paper)
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Effect of elevated concentrations of strontium and iron on the structural and dielectric characteristics of Ba _((1-x-y))Sr _((x))Ti Fe _((y))O _3 prepared through sol-gel technique (Conference Paper)

机译：溶胶-凝胶法制备的锶和铁的浓度升高对Ba _（（1-xy））Sr _（（x））Ti Fe _（（y））O_3的结构和介电特性的影响（会议论文）

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摘要

Nano-composite Ba _(1-x)Sr _((x))TiO _3 (BST), where x=0.01-0.50 and doped with different concentrations of iron Ba _((1-x-y))Sr _((x))TiFe _((y))O _3 (BSTF), where x=0.01 and y=0.01-0.05 powders were prepared by sol-gel method. The effect of increasing the iron and strontium concentrations substituted in Barium strontium titanate system will be studied. The prepared samples have a tetragonal crystalline phase after sintering for 1 h at 750°C in air. The structural and the morphological features of the systems have been studied using X-ray diffraction (XRD), transmission electron microscope (TEM) and scanning electron microscope (SEM). The dielectric properties of the BST and BSTF systems have been investigated as a function of temperature and frequency. The dielectric measurements are carried out in the frequency range 42 Hz-1 MHz, at a temperature ranging between 25 and 250°C. The results showed a decrease in T _c temperature giving the following values 90 and 85°C for B _(10)ST and B _(10)ST _5F prepared powder samples, respectively, implying tetragonal, feroelectric phase at lower temperature into cubic, para-electric phase at temperature higher than T _c.
机译：纳米复合Ba _（1-x）Sr _（（x））TiO _3（BST），其中x = 0.01-0.50并掺杂了不同浓度的铁Ba _（（1-xy））Sr _（（x ））TiFe _（（y））O _3（BSTF），其中x = 0.01，y = 0.01-0.05的粉末通过溶胶-凝胶法制备。将研究增加钛酸锶钡体系中取代的铁和锶浓度的作用。制备的样品在空气中在750°C烧结1小时后具有四方晶相。使用X射线衍射（XRD），透射电子显微镜（TEM）和扫描电子显微镜（SEM）研究了系统的结构和形态特征。已经研究了BST和BSTF系统的介电性能随温度和频率的变化。介电测量是在42 Hz-1 MHz的频率范围内，温度范围为25至250°C之间进行的。结果表明，对于B _（10）ST和B _（10）ST _5F制备的粉末样品，T _c温度分别降低以下90和85°C，这表明较低温度下的四方铁电相变为立方晶，温度高于T _c时的顺电相。

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