Preparation of polycrystalline BaTi_2O_5 ferroelectric ceramics

Guo-jun Li; Rong Tu; Takashi Goto

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Preparation of polycrystalline BaTi_2O_5 ferroelectric ceramics

机译：多晶BaTi_2O_5铁电陶瓷的制备

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Polycrystalline BaTi_2O_5 (BT_2) was prepared by solid state sintering in air using BaCO_3 and TiO_2 as starting materials. A rod-like BT_2 sintered bodies in a single phase were obtained above 1025 ℃ by adding 5 wt.% B_2O_3. The densification of BT_2 sintered bodies decreased with increasing sintering temperature. The maximum permittivity of BT_2 sintered body was 640 at the Curie temperature (T_c) of 461 ℃ and the frequency of 100 kHz. The addition of B_2O_3 was effective to obtain BT_2 in a single phase at low temperatures with elongated microstructure and to improve the permittivity, indicating the formation of preferred orientation at low temperature was related with liquid-phase sintering mechanism.

机译：以BaCO_3和TiO_2为起始原料，在空气中进行固态烧结，制备了多晶BaTi_2O_5（BT_2）。在1025℃以上通过添加5 wt。％的B_2O_3获得单相棒状BT_2烧结体。 BT_2烧结体的致密化程度随烧结温度的升高而降低。在461℃的居里温度（T_c）和100 kHz的频率下，BT_2烧结体的最大介电常数为640。 B_2O_3的添加有效地在低温下以单相形式获得了具有细长微观结构的BT_2，并提高了介电常数，表明低温下优选取向的形成与液相烧结机理有关。

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来源
《Materials Letters》 |2009年第27期|2280-2282|共3页
作者
Guo-jun Li; Rong Tu; Takashi Goto;
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作者单位

Liaoning Key Materials Laboratory for Railway, Dalian Jiaotong University, Dalian 116028, PR China Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
ceramics; ferroelectrics; microstructure; sintering; X-ray diffraction;

机译：陶瓷;铁电体微观结构烧结;X射线衍射;

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Preparation of polycrystalline BaTi_2O_5 ferroelectric ceramics

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