Preparation and properties of SrBi2Ta2O9 ceramics

被引：52

作者：

Shoji, K ^{[1
]}

Aikawa, M

Uehara, Y

Sakata, K

机构：

[1] Ashikaga Inst Technol, Fac Engn, Ashikaga, Tochigi 3268558, Japan

[2] Sci Univ Tokyo, Fac Sci & Technol, Noda, Chiba 2788510, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1998年 / 37卷 / 9B期

关键词：

SrBi2Ta2O9; ceramics; grain orientation; dielectric constant; coupling factor;

D O I：

10.1143/JJAP.37.5273

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The purpose of this paper is to investigate the preparation and properties of SrBi2Ta2O9 ceramics as capacitors and/or piezoelectric materials. Ordinarily fired (OF) samples were prepared by a conventional ceramic technique. Grain-oriented (GO) samples were prepared by the hot-forging method. High-density OF samples with density ratios of 95-96% to theoretical X-ray density were easily obtained at the optimized sintering temperature (1230 degrees C). In this OF sample, the Curie temperature existed at 322 degrees C, and the dielectric constant at room temperature was 135. SrBi2Ta2O9 ceramics did not deform smoothly at 1230-1250 degrees C, and the maximum reduction ratio was about 0.7. The X-ray grain orientation factor of the GO sample was about 0.52. The coupling factor k(33) Of the GO sample with f of 0.36 was 17.7%.

引用

页码：5273 / 5276

页数：4

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