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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >BaFe_(12)O_(19) fine crystals dispersed in a glassy matrix: magnetic and structural properties
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BaFe_(12)O_(19) fine crystals dispersed in a glassy matrix: magnetic and structural properties

机译：分散在玻璃状基质中的BaFe_（12）O_（19）细晶体：磁性和结构性质

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摘要

A Fe_2O_3-BaO-B_2O_3-Sb_2O_3 flux melt was rapidly quenched at 10~4-10~5 grad/s between two rotating copper rollers to form glass ribbons. By X-ray diffraction it was observed that the obtained ribbons were essentially amorphous. The ribbons were subjected to heat treatments between 200 and 780℃ in order to induce the glass devitrification. The irreversible structure changes induced by thermal heat treatments were investigated by X-ray diffraction and by scanning electron microscopy (SEM). Fine crystals of barium ferrite with sizes ranging from 50 to 330 nm, at temperatures higher than 550 °C, were observed. The magnetic properties, in terms of the evolution of size of BaFe_(12)O_(19) crystals dispersed in the glassy matrix, are discussed.
机译：Fe_2O_3-BaO-B_2O_3-Sb_2O_3熔剂在两个旋转的铜辊之间以10〜4-10〜5 grad / s的速度快速淬火，形成玻璃带。通过X射线衍射观察到，所获得的带基本上是非晶的。为了使玻璃失透，对带进行了200至780℃的热处理。通过X射线衍射和扫描电子显微镜（SEM）研究了热处理引起的不可逆结构变化。在高于550°C的温度下，观察到钡铁氧体的细晶尺寸为50至330 nm。根据分散在玻璃状基质中的BaFe_（12）O_（19）晶体的尺寸演变，讨论了磁性。

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