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$$\hbox {BaZrO}_{\mathrm {3}}$$BaZrO3 doping in (Na, K)(Nb, Ta)$$\hbox {O}_{\mathrm {{3}}}$$O3: investigating the phase transformation behaviour, piezoelectric, dielectric, ferroelectric properties and their stability
Bulletin of Materials Science ( IF 1.8 ) Pub Date : 2020-02-25 , DOI: 10.1007/s12034-020-2052-5 Bhupender Rawal , Prashant Dixit , N N Wathore , B Praveenkumar , H S Panda
Bulletin of Materials Science ( IF 1.8 ) Pub Date : 2020-02-25 , DOI: 10.1007/s12034-020-2052-5 Bhupender Rawal , Prashant Dixit , N N Wathore , B Praveenkumar , H S Panda
This study highlights the effect of $$\hbox {BaZrO}_{\mathrm {{3}}}$$ doping on $$(\hbox {Na}_{\mathrm {{0.52}}}\hbox {K}_{\mathrm {{0.48}}}) (\hbox {Nb}_{\mathrm {{0.95}}} \hbox {Ta}_{\mathrm {0.05}})\hbox {O}_{\mathrm {{3}}}$$ lead-free composition. The doping, interestingly, reveals the formation of a new polymorphic phase boundary between rhombohedral and tetragonal phases, while eliminating the orthorhombic phase. Rietveld refinement of temperature dependent X-ray diffraction data, in conjunction with dielectric studies, was utilized to corroborate the findings. The study also addresses in detail the process optimization methodology, involving calcination, sintering and poling process, which is highly relevant to the research community. Two mol% $$\hbox {BaZrO}_{\mathrm {{3}}}$$-doped samples exhibited better piezoelectric, ferroelectric and dielectric properties. The doping also substantially improved the stability of properties during ageing, under thermal and cyclic electrical loadings.
中文翻译:
$$\hbox {BaZrO}_{\mathrm {3}}$$BaZrO3 掺杂 (Na, K)(Nb, Ta)$$\hbox {O}_{\mathrm {{3}}}$$O3 : 研究相变行为、压电、介电、铁电特性及其稳定性
本研究强调了 $$\hbox {BaZrO}_{\mathrm {{3}}}$$ 掺杂对 $$(\hbox {Na}_{\mathrm {{0.52}}}\hbox {K} _{\mathrm {{0.48}}}) (\hbox {Nb}_{\mathrm {{0.95}}} \hbox {Ta}_{\mathrm {0.05}})\hbox {O}_{\mathrm {{3}}}$$ 无铅成分。有趣的是,掺杂揭示了菱形相和四方相之间新的多晶相边界的形成,同时消除了正交相。温度相关的 X 射线衍射数据的 Rietveld 精修结合介电研究被用来证实这些发现。该研究还详细介绍了工艺优化方法,包括与研究界高度相关的煅烧、烧结和极化工艺。两个 mol% $$\hbox {BaZrO}_{\mathrm {{3}}}$$ 掺杂的样品表现出更好的压电性,铁电和介电特性。在热负荷和循环电负荷下,掺杂还大大提高了老化过程中性能的稳定性。
更新日期:2020-02-25
中文翻译:
$$\hbox {BaZrO}_{\mathrm {3}}$$BaZrO3 掺杂 (Na, K)(Nb, Ta)$$\hbox {O}_{\mathrm {{3}}}$$O3 : 研究相变行为、压电、介电、铁电特性及其稳定性
本研究强调了 $$\hbox {BaZrO}_{\mathrm {{3}}}$$ 掺杂对 $$(\hbox {Na}_{\mathrm {{0.52}}}\hbox {K} _{\mathrm {{0.48}}}) (\hbox {Nb}_{\mathrm {{0.95}}} \hbox {Ta}_{\mathrm {0.05}})\hbox {O}_{\mathrm {{3}}}$$ 无铅成分。有趣的是,掺杂揭示了菱形相和四方相之间新的多晶相边界的形成,同时消除了正交相。温度相关的 X 射线衍射数据的 Rietveld 精修结合介电研究被用来证实这些发现。该研究还详细介绍了工艺优化方法,包括与研究界高度相关的煅烧、烧结和极化工艺。两个 mol% $$\hbox {BaZrO}_{\mathrm {{3}}}$$ 掺杂的样品表现出更好的压电性,铁电和介电特性。在热负荷和循环电负荷下,掺杂还大大提高了老化过程中性能的稳定性。