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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Correlating phase and microstructure development versus dielectric properties in La~(3+) and Er~(3+) co-doped Bi_4Ti_3O_(12) ferroelectric ceramics
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Correlating phase and microstructure development versus dielectric properties in La~(3+) and Er~(3+) co-doped Bi_4Ti_3O_(12) ferroelectric ceramics

机译：La〜（3+）和Er〜（3+）共掺杂Bi_4Ti_3O_（12）铁电陶瓷的相和微观结构发展及其介电性能

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摘要

Bi_(3.25)La_(0.75-x)Er_xTi_3O_(12) and Bi_(3.25)La_(0.75)Ti_(3-x)Er_xO_(12-δ) ceramics were prepared and studied in this work in terms of dopant-induced phase and microstructure development as well as dielectric response. The results show that introduction of Er~(3+) tends to reduce the materials' sintering temperature and average grain size. Moreover, it was noted that in these systems the substitution site of this dopant is controlled by valence state and ionic radii mismatch effects. In particular, even when a nominal substitution of Ti~(4+) is conceived, here it is found that Er~(3+) also incorporates at the (Bi,La)~(3+) sites. These and other interesting concluding remarks from this work, including Er~(3+) tolerance, were possible only after comparing, especially, the X-ray diffraction results and the intrinsic ferroelectric characteristics extracted from the dielectric measurements.
机译：Bi_（3.25）La_（0.75-x）Er_xTi_3O_（12）和Bi_（3.25）La_（0.75）Ti_（3-x）Er_xO_（12-δ）陶瓷的制备和研究根据掺杂物诱导的相以及微观结构的发展以及介电响应。结果表明，Er〜（3+）的引入趋于降低材料的烧结温度和平均晶粒尺寸。此外，注意到在这些系统中，该掺杂剂的取代位点由价态和离子半径失配效应控制。特别是，即使设想了Ti〜（4+）的名义上的取代，在此也发现Er〜（3+）也在（Bi，La）〜（3+）位点处结合。这项工作的这些和其他有趣的结论，包括Er〜（3+）耐受性，只有在进行比较之后才能实现，尤其是从电介质测量中提取的X射线衍射结果和固有铁电特性。

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