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首页> 外文期刊>Physica, B. Condensed Matter >Dielectric properties of barium titanate ceramics modified by SiO2 and by BaO-SiO2
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Dielectric properties of barium titanate ceramics modified by SiO2 and by BaO-SiO2

机译：SiO2和BaO-SiO2改性的钛酸钡陶瓷的介电性能

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摘要

The influence of SiO2 on the dielectric properties of barium titanate ceramics was investigated. SiO2 had been doped solely and together with BaO into barium titanate before calcination. X-ray diffraction showed that all the ceramics were of a pure perovskite phase after sintering at 1275 degrees C for 2 h. For SiO2-doping, there was about 2.5 degrees C increase in Curie temperature per molar percentage of doping and the leakage current was obviously increased, especially at low voltages for relatively high doping levels. While for the co-doping of SiO2 and BaO, there was little change in Curie temperature. The point defects formed through the dopings were proposed responsible for the effects. It was suggested that SiO2 is important to barium titanate ceramics not only for sintering but also for modifying their properties.
机译：研究了SiO2对钛酸钡陶瓷介电性能的影响。在煅烧之前，SiO 2已单独和与BaO一起掺杂到钛酸钡中。 X射线衍射表明，所有陶瓷在1275摄氏度下烧结2小时后均为纯钙钛矿相。对于SiO 2掺杂，居里温度每摩尔掺杂百分数增加约2.5摄氏度，并且漏电流明显增加，尤其是在相对较高掺杂水平的低电压下。对于SiO2和BaO的共掺杂，居里温度几乎没有变化。建议通过掺杂形成的点缺陷是造成这种效应的原因。有人指出，SiO2对钛酸钡陶瓷不仅很重要，而且对烧结也很重要。

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